net: thunderx: Support for internal loopback mode
Support for setting VF's corresponding BGX LMAC in internal
loopback mode. This mode can be used for verifying basic HW
functionality such as packet I/O, RX checksum validation,
CQ/RBDR interrupts, stats e.t.c. Useful when DUT has no external
network connectivity.
'loopback' mode can be enabled or disabled via ethtool.
Note: This feature is not supported when no of VFs enabled are
morethan no of physical interfaces i.e active BGX LMACs
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 5e54186..574c492 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -329,6 +329,37 @@
}
}
+/* Configure BGX LMAC in internal loopback mode */
+void bgx_lmac_internal_loopback(int node, int bgx_idx,
+ int lmac_idx, bool enable)
+{
+ struct bgx *bgx;
+ struct lmac *lmac;
+ u64 cfg;
+
+ bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx];
+ if (!bgx)
+ return;
+
+ lmac = &bgx->lmac[lmac_idx];
+ if (lmac->is_sgmii) {
+ cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL);
+ if (enable)
+ cfg |= PCS_MRX_CTL_LOOPBACK1;
+ else
+ cfg &= ~PCS_MRX_CTL_LOOPBACK1;
+ bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg);
+ } else {
+ cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1);
+ if (enable)
+ cfg |= SPU_CTL_LOOPBACK;
+ else
+ cfg &= ~SPU_CTL_LOOPBACK;
+ bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg);
+ }
+}
+EXPORT_SYMBOL(bgx_lmac_internal_loopback);
+
static int bgx_lmac_sgmii_init(struct bgx *bgx, int lmacid)
{
u64 cfg;