powerpc/powernv: Debugfs directory for PHB

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>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 319ed61d674a682475e6280cdee1eb46cab778f7..dc4ec795696714f07d043c7ed55ca6a4301bf6be 100644 (file)
--- 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"
@@ -969,12 +971,33 @@ 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 3656a2409e9a9703b839e4b2d3a7b84fd42b5b79..43906e3ab26f7f538cac0ae1cb7c25fd2a61142e 100644 (file)
--- 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;