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, 400 insertions, 0 deletions

diff --git a/drivers/media/platform/amphion/vpu_msgs.c b/drivers/media/platform/amphion/vpu_msgs.c
new file mode 100644
index 000000000..92672a802
--- /dev/null
+++ b/drivers/media/platform/amphion/vpu_msgs.c
@@ -0,0 +1,400 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2020-2021 NXP
+ */
+
+#include <linux/init.h>
+#include <linux/interconnect.h>
+#include <linux/ioctl.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include "vpu.h"
+#include "vpu_core.h"
+#include "vpu_rpc.h"
+#include "vpu_mbox.h"
+#include "vpu_defs.h"
+#include "vpu_cmds.h"
+#include "vpu_msgs.h"
+#include "vpu_v4l2.h"
+
+#define VPU_PKT_HEADER_LENGTH		3
+
+struct vpu_msg_handler {
+	u32 id;
+	void (*done)(struct vpu_inst *inst, struct vpu_rpc_event *pkt);
+};
+
+static void vpu_session_handle_start_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	vpu_trace(inst->dev, "[%d]\n", inst->id);
+}
+
+static void vpu_session_handle_mem_request(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_pkt_mem_req_data req_data;
+
+	vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&req_data);
+	vpu_trace(inst->dev, "[%d] %d:%d %d:%d %d:%d\n",
+		  inst->id,
+		  req_data.enc_frame_size,
+		  req_data.enc_frame_num,
+		  req_data.ref_frame_size,
+		  req_data.ref_frame_num,
+		  req_data.act_buf_size,
+		  req_data.act_buf_num);
+	vpu_inst_lock(inst);
+	call_void_vop(inst, mem_request,
+		      req_data.enc_frame_size,
+		      req_data.enc_frame_num,
+		      req_data.ref_frame_size,
+		      req_data.ref_frame_num,
+		      req_data.act_buf_size,
+		      req_data.act_buf_num);
+	vpu_inst_unlock(inst);
+}
+
+static void vpu_session_handle_stop_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	vpu_trace(inst->dev, "[%d]\n", inst->id);
+
+	call_void_vop(inst, stop_done);
+}
+
+static void vpu_session_handle_seq_hdr(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_dec_codec_info info;
+	const struct vpu_core_resources *res;
+
+	memset(&info, 0, sizeof(info));
+	res = vpu_get_resource(inst);
+	info.stride = res ? res->stride : 1;
+	vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&info);
+	call_void_vop(inst, event_notify, VPU_MSG_ID_SEQ_HDR_FOUND, &info);
+}
+
+static void vpu_session_handle_resolution_change(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	call_void_vop(inst, event_notify, VPU_MSG_ID_RES_CHANGE, NULL);
+}
+
+static void vpu_session_handle_enc_frame_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_enc_pic_info info;
+
+	vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&info);
+	dev_dbg(inst->dev, "[%d] frame id = %d, wptr = 0x%x, size = %d\n",
+		inst->id, info.frame_id, info.wptr, info.frame_size);
+	call_void_vop(inst, get_one_frame, &info);
+}
+
+static void vpu_session_handle_frame_request(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_fs_info fs;
+
+	vpu_iface_unpack_msg_data(inst->core, pkt, &fs);
+	call_void_vop(inst, event_notify, VPU_MSG_ID_FRAME_REQ, &fs);
+}
+
+static void vpu_session_handle_frame_release(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	if (inst->core->type == VPU_CORE_TYPE_ENC) {
+		struct vpu_frame_info info;
+
+		memset(&info, 0, sizeof(info));
+		vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&info.sequence);
+		dev_dbg(inst->dev, "[%d] %d\n", inst->id, info.sequence);
+		info.type = inst->out_format.type;
+		call_void_vop(inst, buf_done, &info);
+	} else if (inst->core->type == VPU_CORE_TYPE_DEC) {
+		struct vpu_fs_info fs;
+
+		vpu_iface_unpack_msg_data(inst->core, pkt, &fs);
+		call_void_vop(inst, event_notify, VPU_MSG_ID_FRAME_RELEASE, &fs);
+	}
+}
+
+static void vpu_session_handle_input_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	dev_dbg(inst->dev, "[%d]\n", inst->id);
+	call_void_vop(inst, input_done);
+}
+
+static void vpu_session_handle_pic_decoded(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_dec_pic_info info;
+
+	vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&info);
+	call_void_vop(inst, get_one_frame, &info);
+}
+
+static void vpu_session_handle_pic_done(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	struct vpu_dec_pic_info info;
+	struct vpu_frame_info frame;
+
+	memset(&frame, 0, sizeof(frame));
+	vpu_iface_unpack_msg_data(inst->core, pkt, (void *)&info);
+	if (inst->core->type == VPU_CORE_TYPE_DEC)
+		frame.type = inst->cap_format.type;
+	frame.id = info.id;
+	frame.luma = info.luma;
+	frame.skipped = info.skipped;
+	frame.timestamp = info.timestamp;
+
+	call_void_vop(inst, buf_done, &frame);
+}
+
+static void vpu_session_handle_eos(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	call_void_vop(inst, event_notify, VPU_MSG_ID_PIC_EOS, NULL);
+}
+
+static void vpu_session_handle_error(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	char *str = (char *)pkt->data;
+
+	if (strlen(str))
+		dev_err(inst->dev, "instance %d firmware error : %s\n", inst->id, str);
+	else
+		dev_err(inst->dev, "instance %d is unsupported stream\n", inst->id);
+	call_void_vop(inst, event_notify, VPU_MSG_ID_UNSUPPORTED, NULL);
+	vpu_v4l2_set_error(inst);
+}
+
+static void vpu_session_handle_firmware_xcpt(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	char *str = (char *)pkt->data;
+
+	dev_err(inst->dev, "%s firmware xcpt: %s\n",
+		vpu_core_type_desc(inst->core->type), str);
+	call_void_vop(inst, event_notify, VPU_MSG_ID_FIRMWARE_XCPT, NULL);
+	set_bit(inst->id, &inst->core->hang_mask);
+	vpu_v4l2_set_error(inst);
+}
+
+static void vpu_session_handle_pic_skipped(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	vpu_inst_lock(inst);
+	vpu_skip_frame(inst, 1);
+	vpu_inst_unlock(inst);
+}
+
+static struct vpu_msg_handler handlers[] = {
+	{VPU_MSG_ID_START_DONE, vpu_session_handle_start_done},
+	{VPU_MSG_ID_STOP_DONE, vpu_session_handle_stop_done},
+	{VPU_MSG_ID_MEM_REQUEST, vpu_session_handle_mem_request},
+	{VPU_MSG_ID_SEQ_HDR_FOUND, vpu_session_handle_seq_hdr},
+	{VPU_MSG_ID_RES_CHANGE, vpu_session_handle_resolution_change},
+	{VPU_MSG_ID_FRAME_INPUT_DONE, vpu_session_handle_input_done},
+	{VPU_MSG_ID_FRAME_REQ, vpu_session_handle_frame_request},
+	{VPU_MSG_ID_FRAME_RELEASE, vpu_session_handle_frame_release},
+	{VPU_MSG_ID_ENC_DONE, vpu_session_handle_enc_frame_done},
+	{VPU_MSG_ID_PIC_DECODED, vpu_session_handle_pic_decoded},
+	{VPU_MSG_ID_DEC_DONE, vpu_session_handle_pic_done},
+	{VPU_MSG_ID_PIC_EOS, vpu_session_handle_eos},
+	{VPU_MSG_ID_UNSUPPORTED, vpu_session_handle_error},
+	{VPU_MSG_ID_FIRMWARE_XCPT, vpu_session_handle_firmware_xcpt},
+	{VPU_MSG_ID_PIC_SKIPPED, vpu_session_handle_pic_skipped},
+};
+
+static int vpu_session_handle_msg(struct vpu_inst *inst, struct vpu_rpc_event *msg)
+{
+	int ret;
+	u32 msg_id;
+	struct vpu_msg_handler *handler = NULL;
+	unsigned int i;
+
+	ret = vpu_iface_convert_msg_id(inst->core, msg->hdr.id);
+	if (ret < 0)
+		return -EINVAL;
+
+	msg_id = ret;
+	dev_dbg(inst->dev, "[%d] receive event(0x%x)\n", inst->id, msg_id);
+
+	for (i = 0; i < ARRAY_SIZE(handlers); i++) {
+		if (handlers[i].id == msg_id) {
+			handler = &handlers[i];
+			break;
+		}
+	}
+
+	if (handler && handler->done)
+		handler->done(inst, msg);
+
+	vpu_response_cmd(inst, msg_id, 1);
+
+	return 0;
+}
+
+static bool vpu_inst_receive_msg(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	unsigned long bytes = sizeof(struct vpu_rpc_event_header);
+	u32 ret;
+
+	memset(pkt, 0, sizeof(*pkt));
+	if (kfifo_len(&inst->msg_fifo) < bytes)
+		return false;
+
+	ret = kfifo_out(&inst->msg_fifo, pkt, bytes);
+	if (ret != bytes)
+		return false;
+
+	if (pkt->hdr.num > 0) {
+		bytes = pkt->hdr.num * sizeof(u32);
+		ret = kfifo_out(&inst->msg_fifo, pkt->data, bytes);
+		if (ret != bytes)
+			return false;
+	}
+
+	return true;
+}
+
+void vpu_inst_run_work(struct work_struct *work)
+{
+	struct vpu_inst *inst = container_of(work, struct vpu_inst, msg_work);
+	struct vpu_rpc_event pkt;
+
+	while (vpu_inst_receive_msg(inst, &pkt))
+		vpu_session_handle_msg(inst, &pkt);
+}
+
+static void vpu_inst_handle_msg(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
+{
+	unsigned long bytes;
+	u32 id = pkt->hdr.id;
+	int ret;
+
+	if (!inst->workqueue)
+		return;
+
+	bytes = sizeof(pkt->hdr) + pkt->hdr.num * sizeof(u32);
+	ret = kfifo_in(&inst->msg_fifo, pkt, bytes);
+	if (ret != bytes)
+		dev_err(inst->dev, "[%d:%d]overflow: %d\n", inst->core->id, inst->id, id);
+	queue_work(inst->workqueue, &inst->msg_work);
+}
+
+static int vpu_handle_msg(struct vpu_core *core)
+{
+	struct vpu_rpc_event pkt;
+	struct vpu_inst *inst;
+	int ret;
+
+	memset(&pkt, 0, sizeof(pkt));
+	while (!vpu_iface_receive_msg(core, &pkt)) {
+		dev_dbg(core->dev, "event index = %d, id = %d, num = %d\n",
+			pkt.hdr.index, pkt.hdr.id, pkt.hdr.num);
+
+		ret = vpu_iface_convert_msg_id(core, pkt.hdr.id);
+		if (ret < 0)
+			continue;
+
+		inst = vpu_core_find_instance(core, pkt.hdr.index);
+		if (inst) {
+			vpu_response_cmd(inst, ret, 0);
+			mutex_lock(&core->cmd_lock);
+			vpu_inst_record_flow(inst, ret);
+			mutex_unlock(&core->cmd_lock);
+
+			vpu_inst_handle_msg(inst, &pkt);
+			vpu_inst_put(inst);
+		}
+		memset(&pkt, 0, sizeof(pkt));
+	}
+
+	return 0;
+}
+
+static int vpu_isr_thread(struct vpu_core *core, u32 irq_code)
+{
+	dev_dbg(core->dev, "irq code = 0x%x\n", irq_code);
+	switch (irq_code) {
+	case VPU_IRQ_CODE_SYNC:
+		vpu_mbox_send_msg(core, PRC_BUF_OFFSET, core->rpc.phys - core->fw.phys);
+		vpu_mbox_send_msg(core, BOOT_ADDRESS, core->fw.phys);
+		vpu_mbox_send_msg(core, INIT_DONE, 2);
+		break;
+	case VPU_IRQ_CODE_BOOT_DONE:
+		break;
+	case VPU_IRQ_CODE_SNAPSHOT_DONE:
+		break;
+	default:
+		vpu_handle_msg(core);
+		break;
+	}
+
+	return 0;
+}
+
+static void vpu_core_run_msg_work(struct vpu_core *core)
+{
+	const unsigned int SIZE = sizeof(u32);
+
+	while (kfifo_len(&core->msg_fifo) >= SIZE) {
+		u32 data = 0;
+
+		if (kfifo_out(&core->msg_fifo, &data, SIZE) == SIZE)
+			vpu_isr_thread(core, data);
+	}
+}
+
+void vpu_msg_run_work(struct work_struct *work)
+{
+	struct vpu_core *core = container_of(work, struct vpu_core, msg_work);
+	unsigned long delay = msecs_to_jiffies(10);
+
+	vpu_core_run_msg_work(core);
+	queue_delayed_work(core->workqueue, &core->msg_delayed_work, delay);
+}
+
+void vpu_msg_delayed_work(struct work_struct *work)
+{
+	struct vpu_core *core;
+	struct delayed_work *dwork;
+	unsigned long bytes = sizeof(u32);
+	u32 i;
+
+	if (!work)
+		return;
+
+	dwork = to_delayed_work(work);
+	core = container_of(dwork, struct vpu_core, msg_delayed_work);
+	if (kfifo_len(&core->msg_fifo) >= bytes)
+		vpu_core_run_msg_work(core);
+
+	bytes = sizeof(struct vpu_rpc_event_header);
+	for (i = 0; i < core->supported_instance_count; i++) {
+		struct vpu_inst *inst = vpu_core_find_instance(core, i);
+
+		if (!inst)
+			continue;
+
+		if (inst->workqueue && kfifo_len(&inst->msg_fifo) >= bytes)
+			queue_work(inst->workqueue, &inst->msg_work);
+
+		vpu_inst_put(inst);
+	}
+}
+
+int vpu_isr(struct vpu_core *core, u32 irq)
+{
+	switch (irq) {
+	case VPU_IRQ_CODE_SYNC:
+		break;
+	case VPU_IRQ_CODE_BOOT_DONE:
+		complete(&core->cmp);
+		break;
+	case VPU_IRQ_CODE_SNAPSHOT_DONE:
+		complete(&core->cmp);
+		break;
+	default:
+		break;
+	}
+
+	if (kfifo_in(&core->msg_fifo, &irq, sizeof(irq)) != sizeof(irq))
+		dev_err(core->dev, "[%d]overflow: %d\n", core->id, irq);
+	queue_work(core->workqueue, &core->msg_work);
+
+	return 0;
+}