Patchwork [2/6] powerpc/powernv: Support inbound error injection

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Submitter Gavin Shan
Date Sept. 6, 2013, 1 a.m.
Message ID <1378429205-16248-3-git-send-email-shangw@linux.vnet.ibm.com>
Download mbox | patch
Permalink /patch/273006/
State Accepted, archived
Commit ff6bdcd967f6f5ca870a42a744acc8788faaa1d2
Delegated to: Benjamin Herrenschmidt
Headers show

Comments

Gavin Shan - Sept. 6, 2013, 1 a.m.
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>
---
 arch/powerpc/platforms/powernv/eeh-ioda.c |   59 ++++++++++++++++++++++++----
 1 files changed, 50 insertions(+), 9 deletions(-)

Patch

diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 855c1d5..3ee44b0 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -66,26 +66,60 @@  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 */
 
 /**
@@ -123,10 +157,17 @@  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;