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, 704 insertions, 0 deletions

diff --git a/drivers/clk/tegra/clk-bpmp.c b/drivers/clk/tegra/clk-bpmp.c
new file mode 100644
index 000000000..0ecdffaa6
--- /dev/null
+++ b/drivers/clk/tegra/clk-bpmp.c
@@ -0,0 +1,704 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016-2022 NVIDIA Corporation
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/seq_buf.h>
+#include <linux/slab.h>
+
+#include <soc/tegra/bpmp.h>
+#include <soc/tegra/bpmp-abi.h>
+
+#define TEGRA_BPMP_DUMP_CLOCK_INFO	0
+
+#define TEGRA_BPMP_CLK_HAS_MUX		BIT(0)
+#define TEGRA_BPMP_CLK_HAS_SET_RATE	BIT(1)
+#define TEGRA_BPMP_CLK_IS_ROOT		BIT(2)
+
+struct tegra_bpmp_clk_info {
+	unsigned int id;
+	char name[MRQ_CLK_NAME_MAXLEN];
+	unsigned int parents[MRQ_CLK_MAX_PARENTS];
+	unsigned int num_parents;
+	unsigned long flags;
+};
+
+struct tegra_bpmp_clk {
+	struct clk_hw hw;
+
+	struct tegra_bpmp *bpmp;
+	unsigned int id;
+
+	unsigned int num_parents;
+	unsigned int *parents;
+};
+
+static inline struct tegra_bpmp_clk *to_tegra_bpmp_clk(struct clk_hw *hw)
+{
+	return container_of(hw, struct tegra_bpmp_clk, hw);
+}
+
+struct tegra_bpmp_clk_message {
+	unsigned int cmd;
+	unsigned int id;
+
+	struct {
+		const void *data;
+		size_t size;
+	} tx;
+
+	struct {
+		void *data;
+		size_t size;
+		int ret;
+	} rx;
+};
+
+static int tegra_bpmp_clk_transfer(struct tegra_bpmp *bpmp,
+				   const struct tegra_bpmp_clk_message *clk)
+{
+	struct mrq_clk_request request;
+	struct tegra_bpmp_message msg;
+	void *req = &request;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.cmd_and_id = (clk->cmd << 24) | clk->id;
+
+	/*
+	 * The mrq_clk_request structure has an anonymous union at offset 4
+	 * that contains all possible sub-command structures. Copy the data
+	 * to that union. Ideally we'd be able to refer to it by name, but
+	 * doing so would require changing the ABI header and increase the
+	 * maintenance burden.
+	 */
+	memcpy(req + 4, clk->tx.data, clk->tx.size);
+
+	memset(&msg, 0, sizeof(msg));
+	msg.mrq = MRQ_CLK;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = clk->rx.data;
+	msg.rx.size = clk->rx.size;
+
+	err = tegra_bpmp_transfer(bpmp, &msg);
+	if (err < 0)
+		return err;
+	else if (msg.rx.ret < 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int tegra_bpmp_clk_prepare(struct clk_hw *hw)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct tegra_bpmp_clk_message msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_ENABLE;
+	msg.id = clk->id;
+
+	return tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+}
+
+static void tegra_bpmp_clk_unprepare(struct clk_hw *hw)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct tegra_bpmp_clk_message msg;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_DISABLE;
+	msg.id = clk->id;
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0)
+		dev_err(clk->bpmp->dev, "failed to disable clock %s: %d\n",
+			clk_hw_get_name(hw), err);
+}
+
+static int tegra_bpmp_clk_is_prepared(struct clk_hw *hw)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_is_enabled_response response;
+	struct tegra_bpmp_clk_message msg;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_IS_ENABLED;
+	msg.id = clk->id;
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	return response.state;
+}
+
+static unsigned long tegra_bpmp_clk_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_get_rate_response response;
+	struct cmd_clk_get_rate_request request;
+	struct tegra_bpmp_clk_message msg;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_GET_RATE;
+	msg.id = clk->id;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	return response.rate;
+}
+
+static int tegra_bpmp_clk_determine_rate(struct clk_hw *hw,
+					 struct clk_rate_request *rate_req)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_round_rate_response response;
+	struct cmd_clk_round_rate_request request;
+	struct tegra_bpmp_clk_message msg;
+	unsigned long rate;
+	int err;
+
+	rate = min(max(rate_req->rate, rate_req->min_rate), rate_req->max_rate);
+
+	memset(&request, 0, sizeof(request));
+	request.rate = min_t(u64, rate, S64_MAX);
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_ROUND_RATE;
+	msg.id = clk->id;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	rate_req->rate = (unsigned long)response.rate;
+
+	return 0;
+}
+
+static int tegra_bpmp_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_set_parent_response response;
+	struct cmd_clk_set_parent_request request;
+	struct tegra_bpmp_clk_message msg;
+	int err;
+
+	memset(&request, 0, sizeof(request));
+	request.parent_id = clk->parents[index];
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_SET_PARENT;
+	msg.id = clk->id;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	/* XXX check parent ID in response */
+
+	return 0;
+}
+
+static u8 tegra_bpmp_clk_get_parent(struct clk_hw *hw)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_get_parent_response response;
+	struct tegra_bpmp_clk_message msg;
+	unsigned int i;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_GET_PARENT;
+	msg.id = clk->id;
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+	if (err < 0) {
+		dev_err(clk->bpmp->dev, "failed to get parent for %s: %d\n",
+			clk_hw_get_name(hw), err);
+		return U8_MAX;
+	}
+
+	for (i = 0; i < clk->num_parents; i++)
+		if (clk->parents[i] == response.parent_id)
+			return i;
+
+	return U8_MAX;
+}
+
+static int tegra_bpmp_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long parent_rate)
+{
+	struct tegra_bpmp_clk *clk = to_tegra_bpmp_clk(hw);
+	struct cmd_clk_set_rate_response response;
+	struct cmd_clk_set_rate_request request;
+	struct tegra_bpmp_clk_message msg;
+
+	memset(&request, 0, sizeof(request));
+	request.rate = min_t(u64, rate, S64_MAX);
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_SET_RATE;
+	msg.id = clk->id;
+	msg.tx.data = &request;
+	msg.tx.size = sizeof(request);
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	return tegra_bpmp_clk_transfer(clk->bpmp, &msg);
+}
+
+static const struct clk_ops tegra_bpmp_clk_gate_ops = {
+	.prepare = tegra_bpmp_clk_prepare,
+	.unprepare = tegra_bpmp_clk_unprepare,
+	.is_prepared = tegra_bpmp_clk_is_prepared,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+};
+
+static const struct clk_ops tegra_bpmp_clk_mux_ops = {
+	.prepare = tegra_bpmp_clk_prepare,
+	.unprepare = tegra_bpmp_clk_unprepare,
+	.is_prepared = tegra_bpmp_clk_is_prepared,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+	.set_parent = tegra_bpmp_clk_set_parent,
+	.get_parent = tegra_bpmp_clk_get_parent,
+};
+
+static const struct clk_ops tegra_bpmp_clk_rate_ops = {
+	.prepare = tegra_bpmp_clk_prepare,
+	.unprepare = tegra_bpmp_clk_unprepare,
+	.is_prepared = tegra_bpmp_clk_is_prepared,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+	.determine_rate = tegra_bpmp_clk_determine_rate,
+	.set_rate = tegra_bpmp_clk_set_rate,
+};
+
+static const struct clk_ops tegra_bpmp_clk_mux_rate_ops = {
+	.prepare = tegra_bpmp_clk_prepare,
+	.unprepare = tegra_bpmp_clk_unprepare,
+	.is_prepared = tegra_bpmp_clk_is_prepared,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+	.determine_rate = tegra_bpmp_clk_determine_rate,
+	.set_parent = tegra_bpmp_clk_set_parent,
+	.get_parent = tegra_bpmp_clk_get_parent,
+	.set_rate = tegra_bpmp_clk_set_rate,
+};
+
+static const struct clk_ops tegra_bpmp_clk_mux_read_only_ops = {
+	.get_parent = tegra_bpmp_clk_get_parent,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+};
+
+static const struct clk_ops tegra_bpmp_clk_read_only_ops = {
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+};
+
+static const struct clk_ops tegra_bpmp_clk_gate_mux_read_only_ops = {
+	.prepare = tegra_bpmp_clk_prepare,
+	.unprepare = tegra_bpmp_clk_unprepare,
+	.is_prepared = tegra_bpmp_clk_is_prepared,
+	.recalc_rate = tegra_bpmp_clk_recalc_rate,
+	.get_parent = tegra_bpmp_clk_get_parent,
+};
+
+static int tegra_bpmp_clk_get_max_id(struct tegra_bpmp *bpmp)
+{
+	struct cmd_clk_get_max_clk_id_response response;
+	struct tegra_bpmp_clk_message msg;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_GET_MAX_CLK_ID;
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	if (response.max_id > INT_MAX)
+		return -E2BIG;
+
+	return response.max_id;
+}
+
+static int tegra_bpmp_clk_get_info(struct tegra_bpmp *bpmp, unsigned int id,
+				   struct tegra_bpmp_clk_info *info)
+{
+	struct cmd_clk_get_all_info_response response;
+	struct tegra_bpmp_clk_message msg;
+	unsigned int i;
+	int err;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = CMD_CLK_GET_ALL_INFO;
+	msg.id = id;
+	msg.rx.data = &response;
+	msg.rx.size = sizeof(response);
+
+	err = tegra_bpmp_clk_transfer(bpmp, &msg);
+	if (err < 0)
+		return err;
+
+	strscpy(info->name, response.name, MRQ_CLK_NAME_MAXLEN);
+	info->num_parents = response.num_parents;
+
+	for (i = 0; i < info->num_parents; i++)
+		info->parents[i] = response.parents[i];
+
+	info->flags = response.flags;
+
+	return 0;
+}
+
+static void tegra_bpmp_clk_info_dump(struct tegra_bpmp *bpmp,
+				     const char *level,
+				     const struct tegra_bpmp_clk_info *info)
+{
+	const char *prefix = "";
+	struct seq_buf buf;
+	unsigned int i;
+	char flags[64];
+
+	seq_buf_init(&buf, flags, sizeof(flags));
+
+	if (info->flags)
+		seq_buf_printf(&buf, "(");
+
+	if (info->flags & TEGRA_BPMP_CLK_HAS_MUX) {
+		seq_buf_printf(&buf, "%smux", prefix);
+		prefix = ", ";
+	}
+
+	if ((info->flags & TEGRA_BPMP_CLK_HAS_SET_RATE) == 0) {
+		seq_buf_printf(&buf, "%sfixed", prefix);
+		prefix = ", ";
+	}
+
+	if (info->flags & TEGRA_BPMP_CLK_IS_ROOT) {
+		seq_buf_printf(&buf, "%sroot", prefix);
+		prefix = ", ";
+	}
+
+	if (info->flags)
+		seq_buf_printf(&buf, ")");
+
+	dev_printk(level, bpmp->dev, "%03u: %s\n", info->id, info->name);
+	dev_printk(level, bpmp->dev, "  flags: %lx %s\n", info->flags, flags);
+	dev_printk(level, bpmp->dev, "  parents: %u\n", info->num_parents);
+
+	for (i = 0; i < info->num_parents; i++)
+		dev_printk(level, bpmp->dev, "    %03u\n", info->parents[i]);
+}
+
+static int tegra_bpmp_probe_clocks(struct tegra_bpmp *bpmp,
+				   struct tegra_bpmp_clk_info **clocksp)
+{
+	struct tegra_bpmp_clk_info *clocks;
+	unsigned int max_id, id, count = 0;
+	unsigned int holes = 0;
+	int err;
+
+	err = tegra_bpmp_clk_get_max_id(bpmp);
+	if (err < 0)
+		return err;
+
+	max_id = err;
+
+	dev_dbg(bpmp->dev, "maximum clock ID: %u\n", max_id);
+
+	clocks = kcalloc(max_id + 1, sizeof(*clocks), GFP_KERNEL);
+	if (!clocks)
+		return -ENOMEM;
+
+	for (id = 0; id <= max_id; id++) {
+		struct tegra_bpmp_clk_info *info = &clocks[count];
+
+		err = tegra_bpmp_clk_get_info(bpmp, id, info);
+		if (err < 0)
+			continue;
+
+		if (info->num_parents >= U8_MAX) {
+			dev_err(bpmp->dev,
+				"clock %u has too many parents (%u, max: %u)\n",
+				id, info->num_parents, U8_MAX);
+			continue;
+		}
+
+		/* clock not exposed by BPMP */
+		if (info->name[0] == '\0') {
+			holes++;
+			continue;
+		}
+
+		info->id = id;
+		count++;
+
+		if (TEGRA_BPMP_DUMP_CLOCK_INFO)
+			tegra_bpmp_clk_info_dump(bpmp, KERN_DEBUG, info);
+	}
+
+	dev_dbg(bpmp->dev, "holes: %u\n", holes);
+	*clocksp = clocks;
+
+	return count;
+}
+
+static unsigned int
+tegra_bpmp_clk_id_to_index(const struct tegra_bpmp_clk_info *clocks,
+			   unsigned int num_clocks, unsigned int id)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_clocks; i++)
+		if (clocks[i].id == id)
+			return i;
+
+	return UINT_MAX;
+}
+
+static const struct tegra_bpmp_clk_info *
+tegra_bpmp_clk_find(const struct tegra_bpmp_clk_info *clocks,
+		    unsigned int num_clocks, unsigned int id)
+{
+	unsigned int i;
+
+	i = tegra_bpmp_clk_id_to_index(clocks, num_clocks, id);
+
+	if (i < num_clocks)
+		return &clocks[i];
+
+	return NULL;
+}
+
+static struct tegra_bpmp_clk *
+tegra_bpmp_clk_register(struct tegra_bpmp *bpmp,
+			const struct tegra_bpmp_clk_info *info,
+			const struct tegra_bpmp_clk_info *clocks,
+			unsigned int num_clocks)
+{
+	struct tegra_bpmp_clk *clk;
+	struct clk_init_data init;
+	const char **parents;
+	unsigned int i;
+	int err;
+
+	clk = devm_kzalloc(bpmp->dev, sizeof(*clk), GFP_KERNEL);
+	if (!clk)
+		return ERR_PTR(-ENOMEM);
+
+	clk->id = info->id;
+	clk->bpmp = bpmp;
+
+	clk->parents = devm_kcalloc(bpmp->dev, info->num_parents,
+				    sizeof(*clk->parents), GFP_KERNEL);
+	if (!clk->parents)
+		return ERR_PTR(-ENOMEM);
+
+	clk->num_parents = info->num_parents;
+
+	/* hardware clock initialization */
+	memset(&init, 0, sizeof(init));
+	init.name = info->name;
+	clk->hw.init = &init;
+	if (info->flags & BPMP_CLK_STATE_CHANGE_DENIED) {
+		if ((info->flags & BPMP_CLK_RATE_PARENT_CHANGE_DENIED) == 0) {
+			dev_WARN(bpmp->dev,
+				"Firmware bug! Inconsistent permission bits for clock %s. State and parent/rate changes disabled.",
+				 init.name);
+		}
+		if (info->flags & TEGRA_BPMP_CLK_HAS_MUX)
+			init.ops = &tegra_bpmp_clk_mux_read_only_ops;
+		else
+			init.ops = &tegra_bpmp_clk_read_only_ops;
+	} else if (info->flags & BPMP_CLK_RATE_PARENT_CHANGE_DENIED) {
+		if (info->flags & TEGRA_BPMP_CLK_HAS_MUX)
+			init.ops = &tegra_bpmp_clk_gate_mux_read_only_ops;
+		else
+			init.ops = &tegra_bpmp_clk_gate_ops;
+	} else if (info->flags & TEGRA_BPMP_CLK_HAS_MUX) {
+		if (info->flags & TEGRA_BPMP_CLK_HAS_SET_RATE)
+			init.ops = &tegra_bpmp_clk_mux_rate_ops;
+		else
+			init.ops = &tegra_bpmp_clk_mux_ops;
+	} else {
+		if (info->flags & TEGRA_BPMP_CLK_HAS_SET_RATE)
+			init.ops = &tegra_bpmp_clk_rate_ops;
+		else
+			init.ops = &tegra_bpmp_clk_gate_ops;
+	}
+
+	init.num_parents = info->num_parents;
+
+	parents = kcalloc(info->num_parents, sizeof(*parents), GFP_KERNEL);
+	if (!parents)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < info->num_parents; i++) {
+		const struct tegra_bpmp_clk_info *parent;
+
+		/* keep a private copy of the ID to parent index map */
+		clk->parents[i] = info->parents[i];
+
+		parent = tegra_bpmp_clk_find(clocks, num_clocks,
+					     info->parents[i]);
+		if (!parent) {
+			dev_err(bpmp->dev, "no parent %u found for %u\n",
+				info->parents[i], info->id);
+			continue;
+		}
+
+		parents[i] = parent->name;
+	}
+
+	init.parent_names = parents;
+
+	err = devm_clk_hw_register(bpmp->dev, &clk->hw);
+
+	kfree(parents);
+
+	if (err < 0)
+		return ERR_PTR(err);
+
+	return clk;
+}
+
+static void tegra_bpmp_register_clocks_one(struct tegra_bpmp *bpmp,
+					   struct tegra_bpmp_clk_info *infos,
+					   unsigned int i,
+					   unsigned int count)
+{
+	unsigned int j;
+	struct tegra_bpmp_clk_info *info;
+	struct tegra_bpmp_clk *clk;
+
+	if (bpmp->clocks[i]) {
+		/* already registered */
+		return;
+	}
+
+	info = &infos[i];
+	for (j = 0; j < info->num_parents; ++j) {
+		unsigned int p_id = info->parents[j];
+		unsigned int p_i = tegra_bpmp_clk_id_to_index(infos, count,
+							      p_id);
+		if (p_i < count)
+			tegra_bpmp_register_clocks_one(bpmp, infos, p_i, count);
+	}
+
+	clk = tegra_bpmp_clk_register(bpmp, info, infos, count);
+	if (IS_ERR(clk)) {
+		dev_err(bpmp->dev,
+			"failed to register clock %u (%s): %ld\n",
+			info->id, info->name, PTR_ERR(clk));
+		/* intentionally store the error pointer to
+		 * bpmp->clocks[i] to avoid re-attempting the
+		 * registration later
+		 */
+	}
+
+	bpmp->clocks[i] = clk;
+}
+
+static int tegra_bpmp_register_clocks(struct tegra_bpmp *bpmp,
+				      struct tegra_bpmp_clk_info *infos,
+				      unsigned int count)
+{
+	unsigned int i;
+
+	bpmp->num_clocks = count;
+
+	bpmp->clocks = devm_kcalloc(bpmp->dev, count, sizeof(struct tegra_bpmp_clk), GFP_KERNEL);
+	if (!bpmp->clocks)
+		return -ENOMEM;
+
+	for (i = 0; i < count; i++) {
+		tegra_bpmp_register_clocks_one(bpmp, infos, i, count);
+	}
+
+	return 0;
+}
+
+static void tegra_bpmp_unregister_clocks(struct tegra_bpmp *bpmp)
+{
+	unsigned int i;
+
+	for (i = 0; i < bpmp->num_clocks; i++)
+		clk_hw_unregister(&bpmp->clocks[i]->hw);
+}
+
+static struct clk_hw *tegra_bpmp_clk_of_xlate(struct of_phandle_args *clkspec,
+					      void *data)
+{
+	unsigned int id = clkspec->args[0], i;
+	struct tegra_bpmp *bpmp = data;
+
+	for (i = 0; i < bpmp->num_clocks; i++) {
+		struct tegra_bpmp_clk *clk = bpmp->clocks[i];
+
+		if (!clk)
+			continue;
+
+		if (clk->id == id)
+			return &clk->hw;
+	}
+
+	return NULL;
+}
+
+int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
+{
+	struct tegra_bpmp_clk_info *clocks;
+	unsigned int count;
+	int err;
+
+	err = tegra_bpmp_probe_clocks(bpmp, &clocks);
+	if (err < 0)
+		return err;
+
+	count = err;
+
+	dev_dbg(bpmp->dev, "%u clocks probed\n", count);
+
+	err = tegra_bpmp_register_clocks(bpmp, clocks, count);
+	if (err < 0)
+		goto free;
+
+	err = of_clk_add_hw_provider(bpmp->dev->of_node,
+				     tegra_bpmp_clk_of_xlate,
+				     bpmp);
+	if (err < 0) {
+		tegra_bpmp_unregister_clocks(bpmp);
+		goto free;
+	}
+
+free:
+	kfree(clocks);
+	return err;
+}