[PATCH 2/6] PCIERR : interfaces for synchronous I/O error detection

Hidetoshi Seto
2006-03-24T07:48:04Z

This patch is 1/4 of PCIERR implementation for IA64.

This part enable us to switch IA64-specific PCIERR by config.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>

-----
arch/ia64/Kconfig | 10 ++++++++++
arch/ia64/lib/Makefile | 1 +
arch/ia64/lib/pcierr_check.c | 23 +++++++++++++++++++++++
include/asm-ia64/pci.h | 8 ++++++++
4 files changed, 42 insertions(+)

Index: linux-2.6.16_WORK/arch/ia64/Kconfig
=================================--- linux-2.6.16_WORK.orig/arch/ia64/Kconfig
+++ linux-2.6.16_WORK/arch/ia64/Kconfig
@@ -410,6 +410,16 @@
bool
default PCI

+config PCIERR_CHECK
+ bool "Support pcierr interfaces for IO error detection."
+ depends on PCI
+ help
+ Saying Y provides pcierr infrastructure for "RAS-aware" drivers
+ to detect and recover some IO errors, which strongly required by
+ some of very-high-reliable systems.
+
+ If you don't know what to do here, say N.
+
source "drivers/pci/Kconfig"

source "drivers/pci/hotplug/Kconfig"
Index: linux-2.6.16_WORK/arch/ia64/lib/Makefile
=================================--- linux-2.6.16_WORK.orig/arch/ia64/lib/Makefile
+++ linux-2.6.16_WORK/arch/ia64/lib/Makefile
@@ -15,6 +15,7 @@
lib-$(CONFIG_MCKINLEY) += copy_page_mck.o memcpy_mck.o
lib-$(CONFIG_PERFMON) += carta_random.o
lib-$(CONFIG_MD_RAID5) += xor.o
+lib-$(CONFIG_PCIERR_CHECK) += pcierr_check.o

AFLAGS___divdi3.o AFLAGS___udivdi3.o = -DUNSIGNED
Index: linux-2.6.16_WORK/include/asm-ia64/pci.h
=================================--- linux-2.6.16_WORK.orig/include/asm-ia64/pci.h
+++ linux-2.6.16_WORK/include/asm-ia64/pci.h
@@ -171,4 +171,12 @@

#define pcibios_scan_all_fns(a, b) 0

+#ifdef CONFIG_PCIERR_CHECK
+/* Enable ia64 pcierr - See arch/ia64/lib/pcierr_check.c */
+#define HAVE_ARCH_PCIERR_CHECK
+typedef struct {
+ int dummy;
+} iocookie;
+#endif /* CONFIG_PCIERR_CHECK */
+
#endif /* _ASM_IA64_PCI_H */
Index: linux-2.6.16_WORK/arch/ia64/lib/pcierr_check.c
=================================--- /dev/null
+++ linux-2.6.16_WORK/arch/ia64/lib/pcierr_check.c
@@ -0,0 +1,23 @@
+/*
+ * File: pcierr_check.c
+ * Purpose: Implement the IA64 specific pcierr interfaces for RAS-drivers
+ */
+
+#include <linux/pci.h>
+
+void pcierr_clear(iocookie *cookie, struct pci_dev *dev);
+int pcierr_read(iocookie *cookie);
+
+void pcierr_clear(iocookie *cookie, struct pci_dev *dev)
+{
+ /* register device etc. */
+}
+
+int pcierr_read(iocookie *cookie)
+{
+ /* check error etc. */
+ return 0;
+}
+
+EXPORT_SYMBOL(pcierr_read);
+EXPORT_SYMBOL(pcierr_clear);