[netdrvr] sfc: sfc: Add self-test support

Add a set of self-tests accessible thorugh ethtool.
Add hardware loopback and TX disable control code to support them.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/net/sfc/enum.h b/drivers/net/sfc/enum.h
index 43663a4619da..c53290d08e2b 100644
--- a/drivers/net/sfc/enum.h
+++ b/drivers/net/sfc/enum.h
@@ -10,6 +10,55 @@
 #ifndef EFX_ENUM_H
 #define EFX_ENUM_H
 
+/**
+ * enum efx_loopback_mode - loopback modes
+ * @LOOPBACK_NONE: no loopback
+ * @LOOPBACK_XGMII: loopback within MAC at XGMII level
+ * @LOOPBACK_XGXS: loopback within MAC at XGXS level
+ * @LOOPBACK_XAUI: loopback within MAC at XAUI level
+ * @LOOPBACK_PHYXS: loopback within PHY at PHYXS level
+ * @LOOPBACK_PCS: loopback within PHY at PCS level
+ * @LOOPBACK_PMAPMD: loopback within PHY at PMAPMD level
+ * @LOOPBACK_NETWORK: reflecting loopback (even further than furthest!)
+ */
+/* Please keep in order and up-to-date w.r.t the following two #defines */
+enum efx_loopback_mode {
+        LOOPBACK_NONE = 0,
+        LOOPBACK_MAC = 1,
+        LOOPBACK_XGMII = 2,
+        LOOPBACK_XGXS = 3,
+        LOOPBACK_XAUI = 4,
+        LOOPBACK_PHY = 5,
+        LOOPBACK_PHYXS = 6,
+        LOOPBACK_PCS = 7,
+        LOOPBACK_PMAPMD = 8,
+        LOOPBACK_NETWORK = 9,
+        LOOPBACK_MAX
+};
+
+#define LOOPBACK_TEST_MAX LOOPBACK_PMAPMD
+
+extern const char *efx_loopback_mode_names[];
+#define LOOPBACK_MODE_NAME(mode)                        \
+        STRING_TABLE_LOOKUP(mode, efx_loopback_mode)
+#define LOOPBACK_MODE(efx)                              \
+        LOOPBACK_MODE_NAME(efx->loopback_mode)
+
+/* These loopbacks occur within the controller */
+#define LOOPBACKS_10G_INTERNAL ((1 << LOOPBACK_XGMII)| \
+                                (1 << LOOPBACK_XGXS) | \
+                                (1 << LOOPBACK_XAUI))
+
+#define LOOPBACK_MASK(_efx)                     \
+        (1 << (_efx)->loopback_mode)
+
+#define LOOPBACK_INTERNAL(_efx)                                         \
+        ((LOOPBACKS_10G_INTERNAL & LOOPBACK_MASK(_efx)) ? 1 : 0)
+
+#define LOOPBACK_OUT_OF(_from, _to, _mask)              \
+        (((LOOPBACK_MASK(_from) & (_mask)) &&           \
+          ((LOOPBACK_MASK(_to) & (_mask)) == 0)) ? 1 : 0)
+
 /*****************************************************************************/
 
 /**