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, 410 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/coredump.c b/drivers/net/wireless/mediatek/mt76/mt7915/coredump.c
new file mode 100644
index 000000000..d097a56dd
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/coredump.c
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2022 MediaTek Inc. */
+
+#include <linux/devcoredump.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/utsname.h>
+#include "coredump.h"
+
+static bool coredump_memdump;
+module_param(coredump_memdump, bool, 0644);
+MODULE_PARM_DESC(coredump_memdump, "Optional ability to dump firmware memory");
+
+static const struct mt7915_mem_region mt7915_mem_regions[] = {
+	{
+		.start = 0xe003b400,
+		.len = 0x00003bff,
+		.name = "CRAM",
+	},
+};
+
+static const struct mt7915_mem_region mt7916_mem_regions[] = {
+	{
+		.start = 0x00800000,
+		.len = 0x0005ffff,
+		.name = "ROM",
+	},
+	{
+		.start = 0x00900000,
+		.len = 0x00013fff,
+		.name = "ULM1",
+	},
+	{
+		.start = 0x02200000,
+		.len = 0x0004ffff,
+		.name = "ULM2",
+	},
+	{
+		.start = 0x02300000,
+		.len = 0x0004ffff,
+		.name = "ULM3",
+	},
+	{
+		.start = 0x00400000,
+		.len = 0x00027fff,
+		.name = "SRAM",
+	},
+	{
+		.start = 0xe0000000,
+		.len = 0x00157fff,
+		.name = "CRAM",
+	},
+};
+
+static const struct mt7915_mem_region mt7986_mem_regions[] = {
+	{
+		.start = 0x00800000,
+		.len = 0x0005ffff,
+		.name = "ROM",
+	},
+	{
+		.start = 0x00900000,
+		.len = 0x0000ffff,
+		.name = "ULM1",
+	},
+	{
+		.start = 0x02200000,
+		.len = 0x0004ffff,
+		.name = "ULM2",
+	},
+	{
+		.start = 0x02300000,
+		.len = 0x0004ffff,
+		.name = "ULM3",
+	},
+	{
+		.start = 0x00400000,
+		.len = 0x00017fff,
+		.name = "SRAM",
+	},
+	{
+		.start = 0xe0000000,
+		.len = 0x00113fff,
+		.name = "CRAM",
+	},
+};
+
+const struct mt7915_mem_region*
+mt7915_coredump_get_mem_layout(struct mt7915_dev *dev, u32 *num)
+{
+	switch (mt76_chip(&dev->mt76)) {
+	case 0x7915:
+		*num = ARRAY_SIZE(mt7915_mem_regions);
+		return &mt7915_mem_regions[0];
+	case 0x7986:
+		*num = ARRAY_SIZE(mt7986_mem_regions);
+		return &mt7986_mem_regions[0];
+	case 0x7916:
+		*num = ARRAY_SIZE(mt7916_mem_regions);
+		return &mt7916_mem_regions[0];
+	default:
+		return NULL;
+	}
+}
+
+static int mt7915_coredump_get_mem_size(struct mt7915_dev *dev)
+{
+	const struct mt7915_mem_region *mem_region;
+	size_t size = 0;
+	u32 num;
+	int i;
+
+	mem_region = mt7915_coredump_get_mem_layout(dev, &num);
+	if (!mem_region)
+		return 0;
+
+	for (i = 0; i < num; i++) {
+		size += mem_region->len;
+		mem_region++;
+	}
+
+	/* reserve space for the headers */
+	size += num * sizeof(struct mt7915_mem_hdr);
+	/* make sure it is aligned 4 bytes for debug message print out */
+	size = ALIGN(size, 4);
+
+	return size;
+}
+
+struct mt7915_crash_data *mt7915_coredump_new(struct mt7915_dev *dev)
+{
+	struct mt7915_crash_data *crash_data = dev->coredump.crash_data;
+
+	lockdep_assert_held(&dev->dump_mutex);
+
+	guid_gen(&crash_data->guid);
+	ktime_get_real_ts64(&crash_data->timestamp);
+
+	return crash_data;
+}
+
+static void
+mt7915_coredump_fw_state(struct mt7915_dev *dev, struct mt7915_coredump *dump,
+			 bool *exception)
+{
+	u32 state, count, type;
+
+	type = (u32)mt76_get_field(dev, MT_FW_EXCEPT_TYPE, GENMASK(7, 0));
+	state = (u32)mt76_get_field(dev, MT_FW_ASSERT_STAT, GENMASK(7, 0));
+	count = is_mt7915(&dev->mt76) ?
+		(u32)mt76_get_field(dev, MT_FW_EXCEPT_COUNT, GENMASK(15, 8)) :
+		(u32)mt76_get_field(dev, MT_FW_EXCEPT_COUNT, GENMASK(7, 0));
+
+	/* normal mode: driver can manually trigger assert for detail info */
+	if (!count)
+		strscpy(dump->fw_state, "normal", sizeof(dump->fw_state));
+	else if (state > 1 && (count == 1) && type == 5)
+		strscpy(dump->fw_state, "assert", sizeof(dump->fw_state));
+	else if ((state > 1 && count == 1) || count > 1)
+		strscpy(dump->fw_state, "exception", sizeof(dump->fw_state));
+
+	*exception = !!count;
+}
+
+static void
+mt7915_coredump_fw_trace(struct mt7915_dev *dev, struct mt7915_coredump *dump,
+			 bool exception)
+{
+	u32 n, irq, sch, base = MT_FW_EINT_INFO;
+
+	/* trap or run? */
+	dump->last_msg_id = mt76_rr(dev, MT_FW_LAST_MSG_ID);
+
+	n = is_mt7915(&dev->mt76) ?
+	    (u32)mt76_get_field(dev, base, GENMASK(7, 0)) :
+	    (u32)mt76_get_field(dev, base, GENMASK(15, 8));
+	dump->eint_info_idx = n;
+
+	irq = mt76_rr(dev, base + 0x8);
+	n = is_mt7915(&dev->mt76) ?
+	    FIELD_GET(GENMASK(7, 0), irq) : FIELD_GET(GENMASK(23, 16), irq);
+	dump->irq_info_idx = n;
+
+	sch = mt76_rr(dev, MT_FW_SCHED_INFO);
+	n = is_mt7915(&dev->mt76) ?
+	    FIELD_GET(GENMASK(7, 0), sch) : FIELD_GET(GENMASK(15, 8), sch);
+	dump->sched_info_idx = n;
+
+	if (exception) {
+		u32 i, y;
+
+		/* sched trace */
+		n = is_mt7915(&dev->mt76) ?
+		    FIELD_GET(GENMASK(15, 8), sch) : FIELD_GET(GENMASK(7, 0), sch);
+		n = n > 60 ? 60 : n;
+
+		strscpy(dump->trace_sched, "(sched_info) id, time",
+			sizeof(dump->trace_sched));
+
+		for (y = dump->sched_info_idx, i = 0; i < n; i++, y++) {
+			mt7915_memcpy_fromio(dev, dump->sched, base + 0xc + y * 12,
+					     sizeof(dump->sched));
+			y = y >= n ? 0 : y;
+		}
+
+		/* irq trace */
+		n = is_mt7915(&dev->mt76) ?
+		    FIELD_GET(GENMASK(15, 8), irq) : FIELD_GET(GENMASK(7, 0), irq);
+		n = n > 60 ? 60 : n;
+
+		strscpy(dump->trace_irq, "(irq_info) id, time",
+			sizeof(dump->trace_irq));
+
+		for (y = dump->irq_info_idx, i = 0; i < n; i++, y++) {
+			mt7915_memcpy_fromio(dev, dump->irq, base + 0x4 + y * 16,
+					     sizeof(dump->irq));
+			y = y >= n ? 0 : y;
+		}
+	}
+}
+
+static void
+mt7915_coredump_fw_stack(struct mt7915_dev *dev, struct mt7915_coredump *dump,
+			 bool exception)
+{
+	u32 oldest, i, idx;
+
+	/* stop call stack record */
+	if (!exception)
+		mt76_clear(dev, 0x89050200, BIT(0));
+
+	oldest = (u32)mt76_get_field(dev, 0x89050200, GENMASK(20, 16)) + 2;
+	for (i = 0; i < 16; i++) {
+		idx = ((oldest + 2 * i + 1) % 32);
+		dump->call_stack[i] = mt76_rr(dev, 0x89050204 + idx * 4);
+	}
+
+	/* start call stack record */
+	if (!exception)
+		mt76_set(dev, 0x89050200, BIT(0));
+}
+
+static void
+mt7915_coredump_fw_task(struct mt7915_dev *dev, struct mt7915_coredump *dump)
+{
+	u32 offs = is_mt7915(&dev->mt76) ? 0xe0 : 0x170;
+
+	strscpy(dump->task_qid, "(task queue id) read, write",
+		sizeof(dump->task_qid));
+
+	dump->taskq[0].read = mt76_rr(dev, MT_FW_TASK_QID1);
+	dump->taskq[0].write = mt76_rr(dev, MT_FW_TASK_QID1 - 4);
+	dump->taskq[1].read = mt76_rr(dev, MT_FW_TASK_QID2);
+	dump->taskq[1].write = mt76_rr(dev, MT_FW_TASK_QID2 - 4);
+
+	strscpy(dump->task_info, "(task stack) start, end, size",
+		sizeof(dump->task_info));
+
+	dump->taski[0].start = mt76_rr(dev, MT_FW_TASK_START);
+	dump->taski[0].end = mt76_rr(dev, MT_FW_TASK_END);
+	dump->taski[0].size = mt76_rr(dev, MT_FW_TASK_SIZE);
+	dump->taski[1].start = mt76_rr(dev, MT_FW_TASK_START + offs);
+	dump->taski[1].end = mt76_rr(dev, MT_FW_TASK_END + offs);
+	dump->taski[1].size = mt76_rr(dev, MT_FW_TASK_SIZE + offs);
+}
+
+static void
+mt7915_coredump_fw_context(struct mt7915_dev *dev, struct mt7915_coredump *dump)
+{
+	u32 count, idx, id;
+
+	count = mt76_rr(dev, MT_FW_CIRQ_COUNT);
+
+	/* current context */
+	if (!count) {
+		strscpy(dump->fw_context, "(context) interrupt",
+			sizeof(dump->fw_context));
+
+		idx = is_mt7915(&dev->mt76) ?
+		      (u32)mt76_get_field(dev, MT_FW_CIRQ_IDX, GENMASK(31, 16)) :
+		      (u32)mt76_get_field(dev, MT_FW_CIRQ_IDX, GENMASK(15, 0));
+		dump->context.idx = idx;
+		dump->context.handler = mt76_rr(dev, MT_FW_CIRQ_LISR);
+	} else {
+		idx = mt76_rr(dev, MT_FW_TASK_IDX);
+		id = mt76_rr(dev, MT_FW_TASK_ID);
+
+		if (!id && idx == 3) {
+			strscpy(dump->fw_context, "(context) idle",
+				sizeof(dump->fw_context));
+		} else if (id && idx != 3) {
+			strscpy(dump->fw_context, "(context) task",
+				sizeof(dump->fw_context));
+
+			dump->context.idx = idx;
+			dump->context.handler = id;
+		}
+	}
+}
+
+static struct mt7915_coredump *mt7915_coredump_build(struct mt7915_dev *dev)
+{
+	struct mt7915_crash_data *crash_data = dev->coredump.crash_data;
+	struct mt7915_coredump *dump;
+	struct mt7915_coredump_mem *dump_mem;
+	size_t len, sofar = 0, hdr_len = sizeof(*dump);
+	unsigned char *buf;
+	bool exception;
+
+	len = hdr_len;
+
+	if (coredump_memdump && crash_data->memdump_buf_len)
+		len += sizeof(*dump_mem) + crash_data->memdump_buf_len;
+
+	sofar += hdr_len;
+
+	/* this is going to get big when we start dumping memory and such,
+	 * so go ahead and use vmalloc.
+	 */
+	buf = vzalloc(len);
+	if (!buf)
+		return NULL;
+
+	mutex_lock(&dev->dump_mutex);
+
+	dump = (struct mt7915_coredump *)(buf);
+	dump->len = len;
+
+	/* plain text */
+	strscpy(dump->magic, "mt76-crash-dump", sizeof(dump->magic));
+	strscpy(dump->kernel, init_utsname()->release, sizeof(dump->kernel));
+	strscpy(dump->fw_ver, dev->mt76.hw->wiphy->fw_version,
+		sizeof(dump->fw_ver));
+
+	guid_copy(&dump->guid, &crash_data->guid);
+	dump->tv_sec = crash_data->timestamp.tv_sec;
+	dump->tv_nsec = crash_data->timestamp.tv_nsec;
+	dump->device_id = mt76_chip(&dev->mt76);
+
+	mt7915_coredump_fw_state(dev, dump, &exception);
+	mt7915_coredump_fw_trace(dev, dump, exception);
+	mt7915_coredump_fw_task(dev, dump);
+	mt7915_coredump_fw_context(dev, dump);
+	mt7915_coredump_fw_stack(dev, dump, exception);
+
+	/* gather memory content */
+	dump_mem = (struct mt7915_coredump_mem *)(buf + sofar);
+	dump_mem->len = crash_data->memdump_buf_len;
+	if (coredump_memdump && crash_data->memdump_buf_len)
+		memcpy(dump_mem->data, crash_data->memdump_buf,
+		       crash_data->memdump_buf_len);
+
+	mutex_unlock(&dev->dump_mutex);
+
+	return dump;
+}
+
+int mt7915_coredump_submit(struct mt7915_dev *dev)
+{
+	struct mt7915_coredump *dump;
+
+	dump = mt7915_coredump_build(dev);
+	if (!dump) {
+		dev_warn(dev->mt76.dev, "no crash dump data found\n");
+		return -ENODATA;
+	}
+
+	dev_coredumpv(dev->mt76.dev, dump, dump->len, GFP_KERNEL);
+
+	return 0;
+}
+
+int mt7915_coredump_register(struct mt7915_dev *dev)
+{
+	struct mt7915_crash_data *crash_data;
+
+	crash_data = vzalloc(sizeof(*dev->coredump.crash_data));
+	if (!crash_data)
+		return -ENOMEM;
+
+	dev->coredump.crash_data = crash_data;
+
+	if (coredump_memdump) {
+		crash_data->memdump_buf_len = mt7915_coredump_get_mem_size(dev);
+		if (!crash_data->memdump_buf_len)
+			/* no memory content */
+			return 0;
+
+		crash_data->memdump_buf = vzalloc(crash_data->memdump_buf_len);
+		if (!crash_data->memdump_buf) {
+			vfree(crash_data);
+			return -ENOMEM;
+		}
+	}
+
+	return 0;
+}
+
+void mt7915_coredump_unregister(struct mt7915_dev *dev)
+{
+	if (dev->coredump.crash_data->memdump_buf) {
+		vfree(dev->coredump.crash_data->memdump_buf);
+		dev->coredump.crash_data->memdump_buf = NULL;
+		dev->coredump.crash_data->memdump_buf_len = 0;
+	}
+
+	vfree(dev->coredump.crash_data);
+	dev->coredump.crash_data = NULL;
+}
+