Index: sys/dev/ixl/i40e_adminq_cmd.h
===================================================================
--- sys/dev/ixl/i40e_adminq_cmd.h
+++ sys/dev/ixl/i40e_adminq_cmd.h
@@ -1940,6 +1940,7 @@
 	I40E_PHY_TYPE_25GBASE_LR		= 0x22,
 	I40E_PHY_TYPE_25GBASE_AOC		= 0x23,
 	I40E_PHY_TYPE_25GBASE_ACC		= 0x24,
+	I40E_PHY_TYPE_40GBASE_LM4		= 0x25,
 	I40E_PHY_TYPE_MAX,
 	I40E_PHY_TYPE_NOT_SUPPORTED_HIGH_TEMP	= 0xFD,
 	I40E_PHY_TYPE_EMPTY			= 0xFE,
@@ -1981,7 +1982,8 @@
 				BIT_ULL(I40E_PHY_TYPE_25GBASE_SR) | \
 				BIT_ULL(I40E_PHY_TYPE_25GBASE_LR) | \
 				BIT_ULL(I40E_PHY_TYPE_25GBASE_AOC) | \
-				BIT_ULL(I40E_PHY_TYPE_25GBASE_ACC))
+				BIT_ULL(I40E_PHY_TYPE_25GBASE_ACC) | \
+				BIT_ULL(I40E_PHY_TYPE_40GBASE_LM4))
 
 #define I40E_LINK_SPEED_100MB_SHIFT	0x1
 #define I40E_LINK_SPEED_1000MB_SHIFT	0x2
Index: sys/dev/ixl/i40e_common.c
===================================================================
--- sys/dev/ixl/i40e_common.c
+++ sys/dev/ixl/i40e_common.c
@@ -1245,6 +1245,7 @@
 	case I40E_PHY_TYPE_1000BASE_LX:
 	case I40E_PHY_TYPE_40GBASE_SR4:
 	case I40E_PHY_TYPE_40GBASE_LR4:
+	case I40E_PHY_TYPE_40GBASE_LM4:
 	case I40E_PHY_TYPE_25GBASE_LR:
 	case I40E_PHY_TYPE_25GBASE_SR:
 		media = I40E_MEDIA_TYPE_FIBER;
Index: sys/dev/ixl/i40e_type.h
===================================================================
--- sys/dev/ixl/i40e_type.h
+++ sys/dev/ixl/i40e_type.h
@@ -332,7 +332,8 @@
  * PHY types. There is an unused bit (31) in the I40E_CAP_PHY_TYPE_* bit
  * fields but no corresponding gap in the i40e_aq_phy_type enumeration. So,
  * a shift is needed to adjust for this with values larger than 31. The
- * only affected values are I40E_PHY_TYPE_25GBASE_*.
+ * only affected values are I40E_PHY_TYPE_25GBASE_* and
+ * I40E_PHY_TYPE_40GBASE_LM4.
  */
 #define I40E_PHY_TYPE_OFFSET 1
 #define I40E_CAP_PHY_TYPE_25GBASE_KR BIT_ULL(I40E_PHY_TYPE_25GBASE_KR + \
@@ -347,6 +348,8 @@
 					     I40E_PHY_TYPE_OFFSET)
 #define I40E_CAP_PHY_TYPE_25GBASE_ACC BIT_ULL(I40E_PHY_TYPE_25GBASE_ACC + \
 					     I40E_PHY_TYPE_OFFSET)
+#define I40E_CAP_PHY_TYPE_40GBASE_LM4 BIT_ULL(I40E_PHY_TYPE_40GBASE_LM4 + \
+					     I40E_PHY_TYPE_OFFSET)
 #define I40E_HW_CAP_MAX_GPIO			30
 #define I40E_HW_CAP_MDIO_PORT_MODE_MDIO		0
 #define I40E_HW_CAP_MDIO_PORT_MODE_I2C		1
Index: sys/dev/ixl/if_ixl.c
===================================================================
--- sys/dev/ixl/if_ixl.c
+++ sys/dev/ixl/if_ixl.c
@@ -1541,6 +1541,9 @@
 		case I40E_PHY_TYPE_40GBASE_LR4:
 			ifmr->ifm_active |= IFM_40G_LR4;
 			break;
+		case I40E_PHY_TYPE_40GBASE_LM4:
+			ifmr->ifm_active |= IFM_40G_LM4;
+			break;
 		case I40E_PHY_TYPE_XLAUI:
 			ifmr->ifm_active |= IFM_OTHER;
 			break;
Index: sys/dev/ixl/ixl_pf_main.c
===================================================================
--- sys/dev/ixl/ixl_pf_main.c
+++ sys/dev/ixl/ixl_pf_main.c
@@ -642,6 +642,8 @@
 		ifmedia_add(media, IFM_ETHER | IFM_40G_SR4, 0, NULL);
 	if (phy_types & (I40E_CAP_PHY_TYPE_40GBASE_LR4))
 		ifmedia_add(media, IFM_ETHER | IFM_40G_LR4, 0, NULL);
+	if (phy_types & (I40E_CAP_PHY_TYPE_40GBASE_LM4))
+		ifmedia_add(media, IFM_ETHER | IFM_40G_LM4, 0, NULL);
 
 	if (phy_types & (I40E_CAP_PHY_TYPE_1000BASE_KX))
 		ifmedia_add(media, IFM_ETHER | IFM_1000_KX, 0, NULL);
@@ -2868,14 +2870,14 @@
 		"20GBASE-KR2",
 		"Reserved (31)"
 	};
-	static char * ext_phy_types_str[8] = {
+	static char * ext_phy_types_str[9] = {
 		"25GBASE-KR",
 		"25GBASE-CR",
 		"25GBASE-SR",
 		"25GBASE-LR",
 		"25GBASE-AOC",
 		"25GBASE-ACC",
-		"Reserved (6)",
+		"40GBASE-LM4",
 		"Reserved (7)"
 	};
 
Index: sys/net/ieee8023ad_lacp.c
===================================================================
--- sys/net/ieee8023ad_lacp.c
+++ sys/net/ieee8023ad_lacp.c
@@ -1215,6 +1215,7 @@
 		case IFM_40G_CR4:
 		case IFM_40G_SR4:
 		case IFM_40G_LR4:
+		case IFM_40G_LM4:
 		case IFM_40G_XLPPI:
 		case IFM_40G_KR4:
 		case IFM_40G_XLAUI:
Index: sys/net/if_media.h
===================================================================
--- sys/net/if_media.h
+++ sys/net/if_media.h
@@ -259,6 +259,7 @@
 #define	IFM_400G_AUI8_AC IFM_X(116)	/* 400G-AUI8 active copper/optical */
 #define	IFM_400G_AUI8	IFM_X(117)	/* 400G-AUI8 */
 #define	IFM_50G_KR4	IFM_X(118)	/* 50GBase-KR4 */
+#define	IFM_40G_LM4	IFM_X(119)	/* 40GBase-LM4 */
 
 /*
  * Please update ieee8023ad_lacp.c:lacp_compose_key()
@@ -457,6 +458,7 @@
 	{ IFM_40G_CR4,	"40Gbase-CR4" },				\
 	{ IFM_40G_SR4,	"40Gbase-SR4" },				\
 	{ IFM_40G_LR4,	"40Gbase-LR4" },				\
+	{ IFM_40G_LM4,	"40GBase-LM4" },				\
 	{ IFM_1000_KX,	"1000Base-KX" },				\
 	{ IFM_OTHER,	"Other" },					\
 	{ IFM_10G_KX4,	"10GBase-KX4" },				\
@@ -802,6 +804,7 @@
 	{ IFM_ETHER | IFM_40G_CR4,	IF_Gbps(40ULL) },		\
 	{ IFM_ETHER | IFM_40G_SR4,	IF_Gbps(40ULL) },		\
 	{ IFM_ETHER | IFM_40G_LR4,	IF_Gbps(40ULL) },		\
+	{ IFM_ETHER | IFM_40G_LM4,	IF_Gbps(40ULL) },		\
 	{ IFM_ETHER | IFM_1000_KX,	IF_Mbps(1000) },		\
 	{ IFM_ETHER | IFM_10G_KX4,	IF_Gbps(10ULL) },		\
 	{ IFM_ETHER | IFM_10G_KR,	IF_Gbps(10ULL) },		\