Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 464 insertions, 0 deletions

diff --git a/drivers/uio/uio_fsl_elbc_gpcm.c b/drivers/uio/uio_fsl_elbc_gpcm.c
new file mode 100644
index 000000000..82dda799f
--- /dev/null
+++ b/drivers/uio/uio_fsl_elbc_gpcm.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0
+/* uio_fsl_elbc_gpcm: UIO driver for eLBC/GPCM peripherals
+
+   Copyright (C) 2014 Linutronix GmbH
+     Author: John Ogness <john.ogness@linutronix.de>
+
+   This driver provides UIO access to memory of a peripheral connected
+   to the Freescale enhanced local bus controller (eLBC) interface
+   using the general purpose chip-select mode (GPCM).
+
+   Here is an example of the device tree entries:
+
+	localbus@ffe05000 {
+		ranges = <0x2 0x0 0x0 0xff810000 0x10000>;
+
+		dpm@2,0 {
+			compatible = "fsl,elbc-gpcm-uio";
+			reg = <0x2 0x0 0x10000>;
+			elbc-gpcm-br = <0xff810800>;
+			elbc-gpcm-or = <0xffff09f7>;
+			interrupt-parent = <&mpic>;
+			interrupts = <4 1>;
+			device_type = "netx5152";
+			uio_name = "netx_custom";
+			netx5152,init-win0-offset = <0x0>;
+		};
+	};
+
+   Only the entries reg (to identify bank) and elbc-gpcm-* (initial BR/OR
+   values) are required. The entries interrupt*, device_type, and uio_name
+   are optional (as well as any type-specific options such as
+   netx5152,init-win0-offset). As long as no interrupt handler is needed,
+   this driver can be used without any type-specific implementation.
+
+   The netx5152 type has been tested to work with the netX 51/52 hardware
+   from Hilscher using the Hilscher userspace netX stack.
+
+   The netx5152 type should serve as a model to add new type-specific
+   devices as needed.
+*/
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <asm/fsl_lbc.h>
+
+#define MAX_BANKS 8
+
+struct fsl_elbc_gpcm {
+	struct device *dev;
+	struct fsl_lbc_regs __iomem *lbc;
+	u32 bank;
+	const char *name;
+
+	void (*init)(struct uio_info *info);
+	void (*shutdown)(struct uio_info *info, bool init_err);
+	irqreturn_t (*irq_handler)(int irq, struct uio_info *info);
+};
+
+static ssize_t reg_show(struct device *dev, struct device_attribute *attr,
+			char *buf);
+static ssize_t reg_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count);
+
+static DEVICE_ATTR(reg_br, 0664, reg_show, reg_store);
+static DEVICE_ATTR(reg_or, 0664, reg_show, reg_store);
+
+static struct attribute *uio_fsl_elbc_gpcm_attrs[] = {
+	&dev_attr_reg_br.attr,
+	&dev_attr_reg_or.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(uio_fsl_elbc_gpcm);
+
+static ssize_t reg_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct uio_info *info = dev_get_drvdata(dev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+	struct fsl_lbc_bank *bank = &priv->lbc->bank[priv->bank];
+
+	if (attr == &dev_attr_reg_br) {
+		return scnprintf(buf, PAGE_SIZE, "0x%08x\n",
+				 in_be32(&bank->br));
+
+	} else if (attr == &dev_attr_reg_or) {
+		return scnprintf(buf, PAGE_SIZE, "0x%08x\n",
+				 in_be32(&bank->or));
+	}
+
+	return 0;
+}
+
+static ssize_t reg_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct uio_info *info = dev_get_drvdata(dev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+	struct fsl_lbc_bank *bank = &priv->lbc->bank[priv->bank];
+	unsigned long val;
+	u32 reg_br_cur;
+	u32 reg_or_cur;
+	u32 reg_new;
+
+	/* parse use input */
+	if (kstrtoul(buf, 0, &val) != 0)
+		return -EINVAL;
+	reg_new = (u32)val;
+
+	/* read current values */
+	reg_br_cur = in_be32(&bank->br);
+	reg_or_cur = in_be32(&bank->or);
+
+	if (attr == &dev_attr_reg_br) {
+		/* not allowed to change effective base address */
+		if ((reg_br_cur & reg_or_cur & BR_BA) !=
+		    (reg_new & reg_or_cur & BR_BA)) {
+			return -EINVAL;
+		}
+
+		/* not allowed to change mode */
+		if ((reg_new & BR_MSEL) != BR_MS_GPCM)
+			return -EINVAL;
+
+		/* write new value (force valid) */
+		out_be32(&bank->br, reg_new | BR_V);
+
+	} else if (attr == &dev_attr_reg_or) {
+		/* not allowed to change access mask */
+		if ((reg_or_cur & OR_GPCM_AM) != (reg_new & OR_GPCM_AM))
+			return -EINVAL;
+
+		/* write new value */
+		out_be32(&bank->or, reg_new);
+
+	} else {
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+#ifdef CONFIG_UIO_FSL_ELBC_GPCM_NETX5152
+#define DPM_HOST_WIN0_OFFSET	0xff00
+#define DPM_HOST_INT_STAT0	0xe0
+#define DPM_HOST_INT_EN0	0xf0
+#define DPM_HOST_INT_MASK	0xe600ffff
+#define DPM_HOST_INT_GLOBAL_EN	0x80000000
+
+static irqreturn_t netx5152_irq_handler(int irq, struct uio_info *info)
+{
+	void __iomem *reg_int_en = info->mem[0].internal_addr +
+					DPM_HOST_WIN0_OFFSET +
+					DPM_HOST_INT_EN0;
+	void __iomem *reg_int_stat = info->mem[0].internal_addr +
+					DPM_HOST_WIN0_OFFSET +
+					DPM_HOST_INT_STAT0;
+
+	/* check if an interrupt is enabled and active */
+	if ((ioread32(reg_int_en) & ioread32(reg_int_stat) &
+	     DPM_HOST_INT_MASK) == 0) {
+		return IRQ_NONE;
+	}
+
+	/* disable interrupts */
+	iowrite32(ioread32(reg_int_en) & ~DPM_HOST_INT_GLOBAL_EN, reg_int_en);
+
+	return IRQ_HANDLED;
+}
+
+static void netx5152_init(struct uio_info *info)
+{
+	unsigned long win0_offset = DPM_HOST_WIN0_OFFSET;
+	struct fsl_elbc_gpcm *priv = info->priv;
+	const void *prop;
+
+	/* get an optional initial win0 offset */
+	prop = of_get_property(priv->dev->of_node,
+			       "netx5152,init-win0-offset", NULL);
+	if (prop)
+		win0_offset = of_read_ulong(prop, 1);
+
+	/* disable interrupts */
+	iowrite32(0, info->mem[0].internal_addr + win0_offset +
+		     DPM_HOST_INT_EN0);
+}
+
+static void netx5152_shutdown(struct uio_info *info, bool init_err)
+{
+	if (init_err)
+		return;
+
+	/* disable interrupts */
+	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_WIN0_OFFSET +
+		     DPM_HOST_INT_EN0);
+}
+#endif
+
+static void setup_periph(struct fsl_elbc_gpcm *priv,
+				   const char *type)
+{
+#ifdef CONFIG_UIO_FSL_ELBC_GPCM_NETX5152
+	if (strcmp(type, "netx5152") == 0) {
+		priv->irq_handler = netx5152_irq_handler;
+		priv->init = netx5152_init;
+		priv->shutdown = netx5152_shutdown;
+		priv->name = "netX 51/52";
+		return;
+	}
+#endif
+}
+
+static int check_of_data(struct fsl_elbc_gpcm *priv,
+				   struct resource *res,
+				   u32 reg_br, u32 reg_or)
+{
+	/* check specified bank */
+	if (priv->bank >= MAX_BANKS) {
+		dev_err(priv->dev, "invalid bank\n");
+		return -ENODEV;
+	}
+
+	/* check specified mode (BR_MS_GPCM is 0) */
+	if ((reg_br & BR_MSEL) != BR_MS_GPCM) {
+		dev_err(priv->dev, "unsupported mode\n");
+		return -ENODEV;
+	}
+
+	/* check specified mask vs. resource size */
+	if ((~(reg_or & OR_GPCM_AM) + 1) != resource_size(res)) {
+		dev_err(priv->dev, "address mask / size mismatch\n");
+		return -ENODEV;
+	}
+
+	/* check specified address */
+	if ((reg_br & reg_or & BR_BA) != fsl_lbc_addr(res->start)) {
+		dev_err(priv->dev, "base address mismatch\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int get_of_data(struct fsl_elbc_gpcm *priv, struct device_node *node,
+		       struct resource *res, u32 *reg_br,
+		       u32 *reg_or, unsigned int *irq, char **name)
+{
+	const char *dt_name;
+	const char *type;
+	int ret;
+
+	/* get the memory resource */
+	ret = of_address_to_resource(node, 0, res);
+	if (ret) {
+		dev_err(priv->dev, "failed to get resource\n");
+		return ret;
+	}
+
+	/* get the bank number */
+	ret = of_property_read_u32(node, "reg", &priv->bank);
+	if (ret) {
+		dev_err(priv->dev, "failed to get bank number\n");
+		return ret;
+	}
+
+	/* get BR value to set */
+	ret = of_property_read_u32(node, "elbc-gpcm-br", reg_br);
+	if (ret) {
+		dev_err(priv->dev, "missing elbc-gpcm-br value\n");
+		return ret;
+	}
+
+	/* get OR value to set */
+	ret = of_property_read_u32(node, "elbc-gpcm-or", reg_or);
+	if (ret) {
+		dev_err(priv->dev, "missing elbc-gpcm-or value\n");
+		return ret;
+	}
+
+	/* get optional peripheral type */
+	priv->name = "generic";
+	if (of_property_read_string(node, "device_type", &type) == 0)
+		setup_periph(priv, type);
+
+	/* get optional irq value */
+	*irq = irq_of_parse_and_map(node, 0);
+
+	/* sanity check device tree data */
+	ret = check_of_data(priv, res, *reg_br, *reg_or);
+	if (ret)
+		return ret;
+
+	/* get optional uio name */
+	if (of_property_read_string(node, "uio_name", &dt_name) != 0)
+		dt_name = "eLBC_GPCM";
+	*name = devm_kstrdup(priv->dev, dt_name, GFP_KERNEL);
+	if (!*name)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int uio_fsl_elbc_gpcm_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct fsl_elbc_gpcm *priv;
+	struct uio_info *info;
+	char *uio_name = NULL;
+	struct resource res;
+	unsigned int irq;
+	u32 reg_br_cur;
+	u32 reg_or_cur;
+	u32 reg_br_new;
+	u32 reg_or_new;
+	int ret;
+
+	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
+		return -ENODEV;
+
+	/* allocate private data */
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+	priv->dev = &pdev->dev;
+	priv->lbc = fsl_lbc_ctrl_dev->regs;
+
+	/* get device tree data */
+	ret = get_of_data(priv, node, &res, &reg_br_new, &reg_or_new,
+			  &irq, &uio_name);
+	if (ret)
+		return ret;
+
+	/* allocate UIO structure */
+	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	/* get current BR/OR values */
+	reg_br_cur = in_be32(&priv->lbc->bank[priv->bank].br);
+	reg_or_cur = in_be32(&priv->lbc->bank[priv->bank].or);
+
+	/* if bank already configured, make sure it matches */
+	if ((reg_br_cur & BR_V)) {
+		if ((reg_br_cur & BR_MSEL) != BR_MS_GPCM ||
+		    (reg_br_cur & reg_or_cur & BR_BA)
+		     != fsl_lbc_addr(res.start)) {
+			dev_err(priv->dev,
+				"bank in use by another peripheral\n");
+			return -ENODEV;
+		}
+
+		/* warn if behavior settings changing */
+		if ((reg_br_cur & ~(BR_BA | BR_V)) !=
+		    (reg_br_new & ~(BR_BA | BR_V))) {
+			dev_warn(priv->dev,
+				 "modifying BR settings: 0x%08x -> 0x%08x",
+				 reg_br_cur, reg_br_new);
+		}
+		if ((reg_or_cur & ~OR_GPCM_AM) != (reg_or_new & ~OR_GPCM_AM)) {
+			dev_warn(priv->dev,
+				 "modifying OR settings: 0x%08x -> 0x%08x",
+				 reg_or_cur, reg_or_new);
+		}
+	}
+
+	/* configure the bank (force base address and GPCM) */
+	reg_br_new &= ~(BR_BA | BR_MSEL);
+	reg_br_new |= fsl_lbc_addr(res.start) | BR_MS_GPCM | BR_V;
+	out_be32(&priv->lbc->bank[priv->bank].or, reg_or_new);
+	out_be32(&priv->lbc->bank[priv->bank].br, reg_br_new);
+
+	/* map the memory resource */
+	info->mem[0].internal_addr = ioremap(res.start, resource_size(&res));
+	if (!info->mem[0].internal_addr) {
+		dev_err(priv->dev, "failed to map chip region\n");
+		return -ENODEV;
+	}
+
+	/* set all UIO data */
+	info->mem[0].name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%pOFn", node);
+	info->mem[0].addr = res.start;
+	info->mem[0].size = resource_size(&res);
+	info->mem[0].memtype = UIO_MEM_PHYS;
+	info->priv = priv;
+	info->name = uio_name;
+	info->version = "0.0.1";
+	if (irq) {
+		if (priv->irq_handler) {
+			info->irq = irq;
+			info->irq_flags = IRQF_SHARED;
+			info->handler = priv->irq_handler;
+		} else {
+			irq = 0;
+			dev_warn(priv->dev, "ignoring irq, no handler\n");
+		}
+	}
+
+	if (priv->init)
+		priv->init(info);
+
+	/* register UIO device */
+	if (uio_register_device(priv->dev, info) != 0) {
+		dev_err(priv->dev, "UIO registration failed\n");
+		ret = -ENODEV;
+		goto out_err2;
+	}
+
+	/* store private data */
+	platform_set_drvdata(pdev, info);
+
+	dev_info(priv->dev,
+		 "eLBC/GPCM device (%s) at 0x%llx, bank %d, irq=%d\n",
+		 priv->name, (unsigned long long)res.start, priv->bank,
+		 irq ? : -1);
+
+	return 0;
+out_err2:
+	if (priv->shutdown)
+		priv->shutdown(info, true);
+	iounmap(info->mem[0].internal_addr);
+	return ret;
+}
+
+static int uio_fsl_elbc_gpcm_remove(struct platform_device *pdev)
+{
+	struct uio_info *info = platform_get_drvdata(pdev);
+	struct fsl_elbc_gpcm *priv = info->priv;
+
+	platform_set_drvdata(pdev, NULL);
+	uio_unregister_device(info);
+	if (priv->shutdown)
+		priv->shutdown(info, false);
+	iounmap(info->mem[0].internal_addr);
+
+	return 0;
+
+}
+
+static const struct of_device_id uio_fsl_elbc_gpcm_match[] = {
+	{ .compatible = "fsl,elbc-gpcm-uio", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, uio_fsl_elbc_gpcm_match);
+
+static struct platform_driver uio_fsl_elbc_gpcm_driver = {
+	.driver = {
+		.name = "fsl,elbc-gpcm-uio",
+		.of_match_table = uio_fsl_elbc_gpcm_match,
+		.dev_groups = uio_fsl_elbc_gpcm_groups,
+	},
+	.probe = uio_fsl_elbc_gpcm_probe,
+	.remove = uio_fsl_elbc_gpcm_remove,
+};
+module_platform_driver(uio_fsl_elbc_gpcm_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>");
+MODULE_DESCRIPTION("Freescale Enhanced Local Bus Controller GPCM driver");