diff --git a/libc/kernel/uapi/linux/mii.h b/libc/kernel/uapi/linux/mii.h
new file mode 100644
index 0000000..d0f940e
--- /dev/null
+++ b/libc/kernel/uapi/linux/mii.h
@@ -0,0 +1,171 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI__LINUX_MII_H__
+#define _UAPI__LINUX_MII_H__
+#include <linux/types.h>
+#include <linux/ethtool.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_BMCR 0x00
+#define MII_BMSR 0x01
+#define MII_PHYSID1 0x02
+#define MII_PHYSID2 0x03
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_ADVERTISE 0x04
+#define MII_LPA 0x05
+#define MII_EXPANSION 0x06
+#define MII_CTRL1000 0x09
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_STAT1000 0x0a
+#define MII_MMD_CTRL 0x0d
+#define MII_MMD_DATA 0x0e
+#define MII_ESTATUS 0x0f
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_DCOUNTER 0x12
+#define MII_FCSCOUNTER 0x13
+#define MII_NWAYTEST 0x14
+#define MII_RERRCOUNTER 0x15
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_SREVISION 0x16
+#define MII_RESV1 0x17
+#define MII_LBRERROR 0x18
+#define MII_PHYADDR 0x19
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_RESV2 0x1a
+#define MII_TPISTATUS 0x1b
+#define MII_NCONFIG 0x1c
+#define BMCR_RESV 0x003f
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMCR_SPEED1000 0x0040
+#define BMCR_CTST 0x0080
+#define BMCR_FULLDPLX 0x0100
+#define BMCR_ANRESTART 0x0200
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMCR_ISOLATE 0x0400
+#define BMCR_PDOWN 0x0800
+#define BMCR_ANENABLE 0x1000
+#define BMCR_SPEED100 0x2000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMCR_LOOPBACK 0x4000
+#define BMCR_RESET 0x8000
+#define BMSR_ERCAP 0x0001
+#define BMSR_JCD 0x0002
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMSR_LSTATUS 0x0004
+#define BMSR_ANEGCAPABLE 0x0008
+#define BMSR_RFAULT 0x0010
+#define BMSR_ANEGCOMPLETE 0x0020
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMSR_RESV 0x00c0
+#define BMSR_ESTATEN 0x0100
+#define BMSR_100HALF2 0x0200
+#define BMSR_100FULL2 0x0400
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMSR_10HALF 0x0800
+#define BMSR_10FULL 0x1000
+#define BMSR_100HALF 0x2000
+#define BMSR_100FULL 0x4000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define BMSR_100BASE4 0x8000
+#define ADVERTISE_SLCT 0x001f
+#define ADVERTISE_CSMA 0x0001
+#define ADVERTISE_10HALF 0x0020
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADVERTISE_1000XFULL 0x0020
+#define ADVERTISE_10FULL 0x0040
+#define ADVERTISE_1000XHALF 0x0040
+#define ADVERTISE_100HALF 0x0080
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADVERTISE_1000XPAUSE 0x0080
+#define ADVERTISE_100FULL 0x0100
+#define ADVERTISE_1000XPSE_ASYM 0x0100
+#define ADVERTISE_100BASE4 0x0200
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADVERTISE_PAUSE_CAP 0x0400
+#define ADVERTISE_PAUSE_ASYM 0x0800
+#define ADVERTISE_RESV 0x1000
+#define ADVERTISE_RFAULT 0x2000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADVERTISE_LPACK 0x4000
+#define ADVERTISE_NPAGE 0x8000
+#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL |   ADVERTISE_CSMA)
+#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL |   ADVERTISE_100HALF | ADVERTISE_100FULL)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_SLCT 0x001f
+#define LPA_10HALF 0x0020
+#define LPA_1000XFULL 0x0020
+#define LPA_10FULL 0x0040
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_1000XHALF 0x0040
+#define LPA_100HALF 0x0080
+#define LPA_1000XPAUSE 0x0080
+#define LPA_100FULL 0x0100
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_1000XPAUSE_ASYM 0x0100
+#define LPA_100BASE4 0x0200
+#define LPA_PAUSE_CAP 0x0400
+#define LPA_PAUSE_ASYM 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_RESV 0x1000
+#define LPA_RFAULT 0x2000
+#define LPA_LPACK 0x4000
+#define LPA_NPAGE 0x8000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
+#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
+#define EXPANSION_NWAY 0x0001
+#define EXPANSION_LCWP 0x0002
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define EXPANSION_ENABLENPAGE 0x0004
+#define EXPANSION_NPCAPABLE 0x0008
+#define EXPANSION_MFAULTS 0x0010
+#define EXPANSION_RESV 0xffe0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ESTATUS_1000_TFULL 0x2000
+#define ESTATUS_1000_THALF 0x1000
+#define NWAYTEST_RESV1 0x00ff
+#define NWAYTEST_LOOPBACK 0x0100
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define NWAYTEST_RESV2 0xfe00
+#define ADVERTISE_1000FULL 0x0200
+#define ADVERTISE_1000HALF 0x0100
+#define CTL1000_AS_MASTER 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CTL1000_ENABLE_MASTER 0x1000
+#define LPA_1000LOCALRXOK 0x2000
+#define LPA_1000REMRXOK 0x1000
+#define LPA_1000FULL 0x0800
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LPA_1000HALF 0x0400
+#define FLOW_CTRL_TX 0x01
+#define FLOW_CTRL_RX 0x02
+#define MII_MMD_CTRL_DEVAD_MASK 0x1f
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MII_MMD_CTRL_ADDR 0x0000
+#define MII_MMD_CTRL_NOINCR 0x4000
+#define MII_MMD_CTRL_INCR_RDWT 0x8000
+#define MII_MMD_CTRL_INCR_ON_WT 0xC000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct mii_ioctl_data {
+ __u16 phy_id;
+ __u16 reg_num;
+ __u16 val_in;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u16 val_out;
+};
+#endif