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Commit 8998897b authored by Gavin Shan's avatar Gavin Shan Committed by Benjamin Herrenschmidt
Browse files

powerpc/eeh: Debugfs for error injection 



The patch creates debugfs entries (powerpc/PCIxxxx/err_injct) for
injecting EEH errors for testing purpose.

Signed-off-by: default avatarGavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 37c367f2

arch/powerpc/platforms/powernv/eeh-ioda.c

+31 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
 */



#include <linux/bootmem.h>

#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/io.h>
@@ -64,6 +65,29 @@ static struct notifier_block ioda_eeh_nb = { 
	.priority	= 0

};



#ifdef CONFIG_DEBUG_FS

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");

#endif /* CONFIG_DEBUG_FS */



/**

 * ioda_eeh_post_init - Chip dependent post initialization

 * @hose: PCI controller
@@ -101,6 +125,13 @@ static int ioda_eeh_post_init(struct pci_controller *hose) 
			}

		}



#ifdef CONFIG_DEBUG_FS

		if (phb->dbgfs)

			debugfs_create_file("err_injct", 0600,

					    phb->dbgfs, hose,

					    &ioda_eeh_dbgfs_ops);

#endif



		phb->eeh_enabled = 1;

	}