diff options
| author | Gavin Shan | 2013-06-20 18:13:26 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2013-06-21 16:01:52 +1000 |
| commit | 8998897b8f966c9036307b5130494d4bf1e6cb18 (patch) | |
| tree | 3347a4b4e98fc85513f55c0829f943800becc7de /arch | |
| parent | 37c367f2792f899528b5bf201a4bd6131f8b75b6 (diff) | |
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: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/powernv/eeh-ioda.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c index 2b7689ed5d18..84f3036511cb 100644 --- a/arch/powerpc/platforms/powernv/eeh-ioda.c +++ b/arch/powerpc/platforms/powernv/eeh-ioda.c @@ -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; } |