IB/ipath: Add ipath_read_ireg() abstraction
Different chips have different width interrupt status registers, so add
a flag and accessor function to decide which width register read to use.
Signed-off-by: Arthur Jones <arthur.jones@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h
index e07df00..c472904 100644
--- a/drivers/infiniband/hw/ipath/ipath_kernel.h
+++ b/drivers/infiniband/hw/ipath/ipath_kernel.h
@@ -753,6 +753,8 @@
* are 64bit */
#define IPATH_32BITCOUNTERS 0x20000
/* can miss port0 rx interrupts */
+ /* Interrupt register is 64 bits */
+#define IPATH_INTREG_64 0x40000
#define IPATH_DISABLED 0x80000 /* administratively disabled */
/* Use GPIO interrupts for new counters */
#define IPATH_GPIO_ERRINTRS 0x100000
@@ -958,6 +960,12 @@
pd->port_rcvhdrtail_kvaddr));
}
+static inline u64 ipath_read_ireg(const struct ipath_devdata *dd, ipath_kreg r)
+{
+ return (dd->ipath_flags & IPATH_INTREG_64) ?
+ ipath_read_kreg64(dd, r) : ipath_read_kreg32(dd, r);
+}
+
/*
* sysfs interface.
*/