1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 84632c569f2c..2805cfbf1765 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -1226,6 +1226,37 @@ static inline void gfar_write_isrg(struct gfar_private *priv)
         }
 }
 
+static inline int gfar_is_dma_stopped(struct gfar_private *priv)
+{
+        struct gfar __iomem *regs = priv->gfargrp[0].regs;
+
+        return ((gfar_read(&regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)) ==
+               (IEVENT_GRSC | IEVENT_GTSC));
+}
+
+static inline int gfar_is_rx_dma_stopped(struct gfar_private *priv)
+{
+        struct gfar __iomem *regs = priv->gfargrp[0].regs;
+
+        return gfar_read(&regs->ievent) & IEVENT_GRSC;
+}
+
+static inline void gfar_wmb(void)
+{
+#if defined(CONFIG_PPC)
+        /* The powerpc-specific eieio() is used, as wmb() has too strong
+         * semantics (it requires synchronization between cacheable and
+         * uncacheable mappings, which eieio() doesn't provide and which we
+         * don't need), thus requiring a more expensive sync instruction.  At
+         * some point, the set of architecture-independent barrier functions
+         * should be expanded to include weaker barriers.
+         */
+        eieio();
+#else
+        wmb(); /* order write acesses for BD (or FCB) fields */
+#endif
+}
+
 irqreturn_t gfar_receive(int irq, void *dev_id);
 int startup_gfar(struct net_device *dev);
 void stop_gfar(struct net_device *dev);