[PATCH 4/5] powerpc/powernv: Debugfs directory for PHB

[Gavin Shan <shangw@linux.vnet.ibm.com>]

The patch creates one debugfs directory ("powerpc/PCIxxxx") for
each PHB so that we can hook EEH error injection debugfs entry
there in proceeding patch.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/pci-ioda.c |   23 +++++++++++++++++++++++
 arch/powerpc/platforms/powernv/pci.h      |    4 ++++
 2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 48b0940..3e5c3d5 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -13,6 +13,7 @@
 
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/string.h>
 #include <linux/init.h>
@@ -32,6 +33,7 @@
 #include <asm/iommu.h>
 #include <asm/tce.h>
 #include <asm/xics.h>
+#include <asm/debug.h>
 
 #include "powernv.h"
 #include "pci.h"
@@ -968,12 +970,33 @@ static void pnv_pci_ioda_setup_DMA(void)
 	}
 }
 
+static void pnv_pci_ioda_create_dbgfs(void)
+{
+#ifdef CONFIG_DEBUG_FS
+	struct pci_controller *hose, *tmp;
+	struct pnv_phb *phb;
+	char name[16];
+
+	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+		phb = hose->private_data;
+
+		sprintf(name, "PCI%04x", hose->global_number);
+		phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root);
+		if (!phb->dbgfs)
+			pr_warning("%s: Error on creating debugfs on PHB#%x\n",
+				__func__, hose->global_number);
+	}
+#endif /* CONFIG_DEBUG_FS */
+}
+
 static void pnv_pci_ioda_fixup(void)
 {
 	pnv_pci_ioda_setup_PEs();
 	pnv_pci_ioda_setup_seg();
 	pnv_pci_ioda_setup_DMA();
 
+	pnv_pci_ioda_create_dbgfs();
+
 #ifdef CONFIG_EEH
 	eeh_addr_cache_build();
 	eeh_init();
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 3656a240..43906e3 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -96,6 +96,10 @@ struct pnv_phb {
 	int			removed;
 #endif
 
+#ifdef CONFIG_DEBUG_FS
+	struct dentry		*dbgfs;
+#endif
+
 #ifdef CONFIG_PCI_MSI
 	unsigned int		msi_base;
 	unsigned int		msi32_support;
-- 
1.7.5.4