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powerpc/eeh: Debugfs for error injection

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

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2013-06-20 18:13:26 +08:00 committed by Benjamin Herrenschmidt
parent 37c367f279
commit 8998897b8f
1 changed files with 31 additions and 0 deletions
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31
arch/powerpc/platforms/powernv/eeh-ioda.c
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@ -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;
}