powerpc/powernv: Support inbound error injection

For now, we only support outbound error injection. Actually, the
hardware supports injecting inbound errors as well. The patch enables
to inject inbound errors.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 50 insertions, 9 deletions

diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 799ccaa07b80..34e0583106cf 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -59,26 +59,60 @@ static struct notifier_block ioda_eeh_nb = {
 };
 
 #ifdef CONFIG_DEBUG_FS
-static int ioda_eeh_dbgfs_set(void *data, u64 val)
+static int ioda_eeh_dbgfs_set(void *data, int offset, u64 val)
 {
         struct pci_controller *hose = data;
         struct pnv_phb *phb = hose->private_data;
 
-        out_be64(phb->regs + 0xD10, val);
+        out_be64(phb->regs + offset, val);
         return 0;
 }
 
-static int ioda_eeh_dbgfs_get(void *data, u64 *val)
+static int ioda_eeh_dbgfs_get(void *data, int offset, u64 *val)
 {
         struct pci_controller *hose = data;
         struct pnv_phb *phb = hose->private_data;
 
-        *val = in_be64(phb->regs + 0xD10);
+        *val = in_be64(phb->regs + offset);
         return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_dbgfs_ops, ioda_eeh_dbgfs_get,
-                        ioda_eeh_dbgfs_set, "0x%llx\n");
+static int ioda_eeh_outb_dbgfs_set(void *data, u64 val)
+{
+        return ioda_eeh_dbgfs_set(data, 0xD10, val);
+}
+
+static int ioda_eeh_outb_dbgfs_get(void *data, u64 *val)
+{
+        return ioda_eeh_dbgfs_get(data, 0xD10, val);
+}
+
+static int ioda_eeh_inbA_dbgfs_set(void *data, u64 val)
+{
+        return ioda_eeh_dbgfs_set(data, 0xD90, val);
+}
+
+static int ioda_eeh_inbA_dbgfs_get(void *data, u64 *val)
+{
+        return ioda_eeh_dbgfs_get(data, 0xD90, val);
+}
+
+static int ioda_eeh_inbB_dbgfs_set(void *data, u64 val)
+{
+        return ioda_eeh_dbgfs_set(data, 0xE10, val);
+}
+
+static int ioda_eeh_inbB_dbgfs_get(void *data, u64 *val)
+{
+        return ioda_eeh_dbgfs_get(data, 0xE10, val);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_outb_dbgfs_ops, ioda_eeh_outb_dbgfs_get,
+                        ioda_eeh_outb_dbgfs_set, "0x%llx\n");
+DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_inbA_dbgfs_ops, ioda_eeh_inbA_dbgfs_get,
+                        ioda_eeh_inbA_dbgfs_set, "0x%llx\n");
+DEFINE_SIMPLE_ATTRIBUTE(ioda_eeh_inbB_dbgfs_ops, ioda_eeh_inbB_dbgfs_get,
+                        ioda_eeh_inbB_dbgfs_set, "0x%llx\n");
 #endif /* CONFIG_DEBUG_FS */
 
 /**
@@ -116,10 +150,17 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
         }
 
 #ifdef CONFIG_DEBUG_FS
-        if (phb->dbgfs)
-                debugfs_create_file("err_injct", 0600,
+        if (phb->dbgfs) {
+                debugfs_create_file("err_injct_outbound", 0600,
+                                    phb->dbgfs, hose,
+                                    &ioda_eeh_outb_dbgfs_ops);
+                debugfs_create_file("err_injct_inboundA", 0600,
                                     phb->dbgfs, hose,
-                                    &ioda_eeh_dbgfs_ops);
+                                    &ioda_eeh_inbA_dbgfs_ops);
+                debugfs_create_file("err_injct_inboundB", 0600,
+                                    phb->dbgfs, hose,
+                                    &ioda_eeh_inbB_dbgfs_ops);
+        }
 #endif
 
         phb->eeh_state |= PNV_EEH_STATE_ENABLED;