EFX_LOOPBACK_GMAC
EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMAC == EFX_LOOPBACK_GMAC);
EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMAC == EFX_LOOPBACK_GMAC);
EFX_SET_QWORD_BIT(mask, EFX_LOOPBACK_GMAC);
EFX_STATIC_ASSERT(MC_CMD_LOOPBACK_GMAC == EFX_LOOPBACK_GMAC);