[PATCH 27/27] powerpc/eeh: Debugfs for error injection
From: Gavin Shan <hidden>
Date: 2013-06-05 07:34:59
Subsystem:
linux for powerpc (32-bit and 64-bit), pci enhanced error handling (eeh) for powerpc, the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Mahesh J Salgaonkar, Linus Torvalds
The patch creates debugfs entries (powerpc/PCIxxxx/err_injct) for injecting EEH errors for testing purpose. Signed-off-by: Gavin Shan <redacted> --- arch/powerpc/platforms/powernv/eeh-ioda.c | 33 ++++++++++++++++++++++++++++- 1 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index cbef2d5..6b13405 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c@@ -21,6 +21,7 @@ */ #include <linux/bootmem.h> +#include <linux/debugfs.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/io.h>
@@ -43,6 +44,29 @@ #include "powernv.h" #include "pci.h" +#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
@@ -56,8 +80,15 @@ static int ioda_eeh_post_init(struct pci_controller *hose) struct pnv_phb *phb = hose->private_data; /* FIXME: Enable it for PHB3 later */ - if (phb->type == PNV_PHB_IODA1) + if (phb->type == PNV_PHB_IODA1) { +#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; + } return 0; }
--
1.7.5.4