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, 571 insertions, 0 deletions

diff --git a/drivers/misc/habanalabs/common/irq.c b/drivers/misc/habanalabs/common/irq.c
new file mode 100644
index 000000000..94d537fd4
--- /dev/null
+++ b/drivers/misc/habanalabs/common/irq.c
@@ -0,0 +1,571 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2016-2022 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "habanalabs.h"
+
+#include <linux/slab.h>
+
+/**
+ * struct hl_eqe_work - This structure is used to schedule work of EQ
+ *                      entry and cpucp_reset event
+ *
+ * @eq_work:          workqueue object to run when EQ entry is received
+ * @hdev:             pointer to device structure
+ * @eq_entry:         copy of the EQ entry
+ */
+struct hl_eqe_work {
+	struct work_struct	eq_work;
+	struct hl_device	*hdev;
+	struct hl_eq_entry	eq_entry;
+};
+
+/**
+ * hl_cq_inc_ptr - increment ci or pi of cq
+ *
+ * @ptr: the current ci or pi value of the completion queue
+ *
+ * Increment ptr by 1. If it reaches the number of completion queue
+ * entries, set it to 0
+ */
+inline u32 hl_cq_inc_ptr(u32 ptr)
+{
+	ptr++;
+	if (unlikely(ptr == HL_CQ_LENGTH))
+		ptr = 0;
+	return ptr;
+}
+
+/**
+ * hl_eq_inc_ptr - increment ci of eq
+ *
+ * @ptr: the current ci value of the event queue
+ *
+ * Increment ptr by 1. If it reaches the number of event queue
+ * entries, set it to 0
+ */
+static inline u32 hl_eq_inc_ptr(u32 ptr)
+{
+	ptr++;
+	if (unlikely(ptr == HL_EQ_LENGTH))
+		ptr = 0;
+	return ptr;
+}
+
+static void irq_handle_eqe(struct work_struct *work)
+{
+	struct hl_eqe_work *eqe_work = container_of(work, struct hl_eqe_work,
+							eq_work);
+	struct hl_device *hdev = eqe_work->hdev;
+
+	hdev->asic_funcs->handle_eqe(hdev, &eqe_work->eq_entry);
+
+	kfree(eqe_work);
+}
+
+/**
+ * job_finish - queue job finish work
+ *
+ * @hdev: pointer to device structure
+ * @cs_seq: command submission sequence
+ * @cq: completion queue
+ *
+ */
+static void job_finish(struct hl_device *hdev, u32 cs_seq, struct hl_cq *cq)
+{
+	struct hl_hw_queue *queue;
+	struct hl_cs_job *job;
+
+	queue = &hdev->kernel_queues[cq->hw_queue_id];
+	job = queue->shadow_queue[hl_pi_2_offset(cs_seq)];
+	queue_work(hdev->cq_wq[cq->cq_idx], &job->finish_work);
+
+	atomic_inc(&queue->ci);
+}
+
+/**
+ * cs_finish - queue all cs jobs finish work
+ *
+ * @hdev: pointer to device structure
+ * @cs_seq: command submission sequence
+ *
+ */
+static void cs_finish(struct hl_device *hdev, u16 cs_seq)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_hw_queue *queue;
+	struct hl_cs *cs;
+	struct hl_cs_job *job;
+
+	cs = hdev->shadow_cs_queue[cs_seq & (prop->max_pending_cs - 1)];
+	if (!cs) {
+		dev_warn(hdev->dev,
+			"No pointer to CS in shadow array at index %d\n",
+			cs_seq);
+		return;
+	}
+
+	list_for_each_entry(job, &cs->job_list, cs_node) {
+		queue = &hdev->kernel_queues[job->hw_queue_id];
+		atomic_inc(&queue->ci);
+	}
+
+	queue_work(hdev->cs_cmplt_wq, &cs->finish_work);
+}
+
+/**
+ * hl_irq_handler_cq - irq handler for completion queue
+ *
+ * @irq: irq number
+ * @arg: pointer to completion queue structure
+ *
+ */
+irqreturn_t hl_irq_handler_cq(int irq, void *arg)
+{
+	struct hl_cq *cq = arg;
+	struct hl_device *hdev = cq->hdev;
+	bool shadow_index_valid, entry_ready;
+	u16 shadow_index;
+	struct hl_cq_entry *cq_entry, *cq_base;
+
+	if (hdev->disabled) {
+		dev_dbg(hdev->dev,
+			"Device disabled but received IRQ %d for CQ %d\n",
+			irq, cq->hw_queue_id);
+		return IRQ_HANDLED;
+	}
+
+	cq_base = cq->kernel_address;
+
+	while (1) {
+		cq_entry = (struct hl_cq_entry *) &cq_base[cq->ci];
+
+		entry_ready = !!FIELD_GET(CQ_ENTRY_READY_MASK,
+				le32_to_cpu(cq_entry->data));
+		if (!entry_ready)
+			break;
+
+		/* Make sure we read CQ entry contents after we've
+		 * checked the ownership bit.
+		 */
+		dma_rmb();
+
+		shadow_index_valid =
+			!!FIELD_GET(CQ_ENTRY_SHADOW_INDEX_VALID_MASK,
+					le32_to_cpu(cq_entry->data));
+
+		shadow_index = FIELD_GET(CQ_ENTRY_SHADOW_INDEX_MASK,
+				le32_to_cpu(cq_entry->data));
+
+		/*
+		 * CQ interrupt handler has 2 modes of operation:
+		 * 1. Interrupt per CS completion: (Single CQ for all queues)
+		 *    CQ entry represents a completed CS
+		 *
+		 * 2. Interrupt per CS job completion in queue: (CQ per queue)
+		 *    CQ entry represents a completed job in a certain queue
+		 */
+		if (shadow_index_valid && !hdev->disabled) {
+			if (hdev->asic_prop.completion_mode ==
+					HL_COMPLETION_MODE_CS)
+				cs_finish(hdev, shadow_index);
+			else
+				job_finish(hdev, shadow_index, cq);
+		}
+
+		/* Clear CQ entry ready bit */
+		cq_entry->data = cpu_to_le32(le32_to_cpu(cq_entry->data) &
+						~CQ_ENTRY_READY_MASK);
+
+		cq->ci = hl_cq_inc_ptr(cq->ci);
+
+		/* Increment free slots */
+		atomic_inc(&cq->free_slots_cnt);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * hl_ts_free_objects - handler of the free objects workqueue.
+ * This function should put refcount to objects that the registration node
+ * took refcount to them.
+ * @work: workqueue object pointer
+ */
+static void hl_ts_free_objects(struct work_struct *work)
+{
+	struct timestamp_reg_work_obj *job =
+			container_of(work, struct timestamp_reg_work_obj, free_obj);
+	struct timestamp_reg_free_node *free_obj, *temp_free_obj;
+	struct list_head *free_list_head = job->free_obj_head;
+	struct hl_device *hdev = job->hdev;
+
+	list_for_each_entry_safe(free_obj, temp_free_obj, free_list_head, free_objects_node) {
+		dev_dbg(hdev->dev, "About to put refcount to buf (%p) cq_cb(%p)\n",
+					free_obj->buf,
+					free_obj->cq_cb);
+
+		hl_mmap_mem_buf_put(free_obj->buf);
+		hl_cb_put(free_obj->cq_cb);
+		kfree(free_obj);
+	}
+
+	kfree(free_list_head);
+	kfree(job);
+}
+
+/*
+ * This function called with spin_lock of wait_list_lock taken
+ * This function will set timestamp and delete the registration node from the
+ * wait_list_lock.
+ * and since we're protected with spin_lock here, so we cannot just put the refcount
+ * for the objects here, since the release function may be called and it's also a long
+ * logic (which might sleep also) that cannot be handled in irq context.
+ * so here we'll be filling a list with nodes of "put" jobs and then will send this
+ * list to a dedicated workqueue to do the actual put.
+ */
+static int handle_registration_node(struct hl_device *hdev, struct hl_user_pending_interrupt *pend,
+						struct list_head **free_list)
+{
+	struct timestamp_reg_free_node *free_node;
+	u64 timestamp;
+
+	if (!(*free_list)) {
+		/* Alloc/Init the timestamp registration free objects list */
+		*free_list = kmalloc(sizeof(struct list_head), GFP_ATOMIC);
+		if (!(*free_list))
+			return -ENOMEM;
+
+		INIT_LIST_HEAD(*free_list);
+	}
+
+	free_node = kmalloc(sizeof(*free_node), GFP_ATOMIC);
+	if (!free_node)
+		return -ENOMEM;
+
+	timestamp = ktime_get_ns();
+
+	*pend->ts_reg_info.timestamp_kernel_addr = timestamp;
+
+	dev_dbg(hdev->dev, "Timestamp is set to ts cb address (%p), ts: 0x%llx\n",
+			pend->ts_reg_info.timestamp_kernel_addr,
+			*(u64 *)pend->ts_reg_info.timestamp_kernel_addr);
+
+	list_del(&pend->wait_list_node);
+
+	/* Mark kernel CB node as free */
+	pend->ts_reg_info.in_use = 0;
+
+	/* Putting the refcount for ts_buff and cq_cb objects will be handled
+	 * in workqueue context, just add job to free_list.
+	 */
+	free_node->buf = pend->ts_reg_info.buf;
+	free_node->cq_cb = pend->ts_reg_info.cq_cb;
+	list_add(&free_node->free_objects_node, *free_list);
+
+	return 0;
+}
+
+static void handle_user_interrupt(struct hl_device *hdev, struct hl_user_interrupt *intr)
+{
+	struct hl_user_pending_interrupt *pend, *temp_pend;
+	struct list_head *ts_reg_free_list_head = NULL;
+	struct timestamp_reg_work_obj *job;
+	bool reg_node_handle_fail = false;
+	ktime_t now = ktime_get();
+	int rc;
+
+	/* For registration nodes:
+	 * As part of handling the registration nodes, we should put refcount to
+	 * some objects. the problem is that we cannot do that under spinlock
+	 * or in irq handler context at all (since release functions are long and
+	 * might sleep), so we will need to handle that part in workqueue context.
+	 * To avoid handling kmalloc failure which compels us rolling back actions
+	 * and move nodes hanged on the free list back to the interrupt wait list
+	 * we always alloc the job of the WQ at the beginning.
+	 */
+	job = kmalloc(sizeof(*job), GFP_ATOMIC);
+	if (!job)
+		return;
+
+	spin_lock(&intr->wait_list_lock);
+	list_for_each_entry_safe(pend, temp_pend, &intr->wait_list_head, wait_list_node) {
+		if ((pend->cq_kernel_addr && *(pend->cq_kernel_addr) >= pend->cq_target_value) ||
+				!pend->cq_kernel_addr) {
+			if (pend->ts_reg_info.buf) {
+				if (!reg_node_handle_fail) {
+					rc = handle_registration_node(hdev, pend,
+									&ts_reg_free_list_head);
+					if (rc)
+						reg_node_handle_fail = true;
+				}
+			} else {
+				/* Handle wait target value node */
+				pend->fence.timestamp = now;
+				complete_all(&pend->fence.completion);
+			}
+		}
+	}
+	spin_unlock(&intr->wait_list_lock);
+
+	if (ts_reg_free_list_head) {
+		INIT_WORK(&job->free_obj, hl_ts_free_objects);
+		job->free_obj_head = ts_reg_free_list_head;
+		job->hdev = hdev;
+		queue_work(hdev->ts_free_obj_wq, &job->free_obj);
+	} else {
+		kfree(job);
+	}
+}
+
+/**
+ * hl_irq_handler_user_interrupt - irq handler for user interrupts
+ *
+ * @irq: irq number
+ * @arg: pointer to user interrupt structure
+ *
+ */
+irqreturn_t hl_irq_handler_user_interrupt(int irq, void *arg)
+{
+	struct hl_user_interrupt *user_int = arg;
+	struct hl_device *hdev = user_int->hdev;
+
+	if (user_int->is_decoder)
+		handle_user_interrupt(hdev, &hdev->common_decoder_interrupt);
+	else
+		handle_user_interrupt(hdev, &hdev->common_user_cq_interrupt);
+
+	/* Handle user cq or decoder interrupts registered on this specific irq */
+	handle_user_interrupt(hdev, user_int);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * hl_irq_handler_default - default irq handler
+ *
+ * @irq: irq number
+ * @arg: pointer to user interrupt structure
+ *
+ */
+irqreturn_t hl_irq_handler_default(int irq, void *arg)
+{
+	struct hl_user_interrupt *user_interrupt = arg;
+	struct hl_device *hdev = user_interrupt->hdev;
+	u32 interrupt_id = user_interrupt->interrupt_id;
+
+	dev_err(hdev->dev, "got invalid user interrupt %u", interrupt_id);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * hl_irq_handler_eq - irq handler for event queue
+ *
+ * @irq: irq number
+ * @arg: pointer to event queue structure
+ *
+ */
+irqreturn_t hl_irq_handler_eq(int irq, void *arg)
+{
+	struct hl_eq *eq = arg;
+	struct hl_device *hdev = eq->hdev;
+	struct hl_eq_entry *eq_entry;
+	struct hl_eq_entry *eq_base;
+	struct hl_eqe_work *handle_eqe_work;
+	bool entry_ready;
+	u32 cur_eqe;
+	u16 cur_eqe_index;
+
+	eq_base = eq->kernel_address;
+
+	while (1) {
+		cur_eqe = le32_to_cpu(eq_base[eq->ci].hdr.ctl);
+		entry_ready = !!FIELD_GET(EQ_CTL_READY_MASK, cur_eqe);
+
+		if (!entry_ready)
+			break;
+
+		cur_eqe_index = FIELD_GET(EQ_CTL_INDEX_MASK, cur_eqe);
+		if ((hdev->event_queue.check_eqe_index) &&
+				(((eq->prev_eqe_index + 1) & EQ_CTL_INDEX_MASK)
+							!= cur_eqe_index)) {
+			dev_dbg(hdev->dev,
+				"EQE 0x%x in queue is ready but index does not match %d!=%d",
+				eq_base[eq->ci].hdr.ctl,
+				((eq->prev_eqe_index + 1) & EQ_CTL_INDEX_MASK),
+				cur_eqe_index);
+			break;
+		}
+
+		eq->prev_eqe_index++;
+
+		eq_entry = &eq_base[eq->ci];
+
+		/*
+		 * Make sure we read EQ entry contents after we've
+		 * checked the ownership bit.
+		 */
+		dma_rmb();
+
+		if (hdev->disabled && !hdev->reset_info.in_compute_reset) {
+			dev_warn(hdev->dev, "Device disabled but received an EQ event\n");
+			goto skip_irq;
+		}
+
+		handle_eqe_work = kmalloc(sizeof(*handle_eqe_work), GFP_ATOMIC);
+		if (handle_eqe_work) {
+			INIT_WORK(&handle_eqe_work->eq_work, irq_handle_eqe);
+			handle_eqe_work->hdev = hdev;
+
+			memcpy(&handle_eqe_work->eq_entry, eq_entry,
+					sizeof(*eq_entry));
+
+			queue_work(hdev->eq_wq, &handle_eqe_work->eq_work);
+		}
+skip_irq:
+		/* Clear EQ entry ready bit */
+		eq_entry->hdr.ctl =
+			cpu_to_le32(le32_to_cpu(eq_entry->hdr.ctl) &
+							~EQ_CTL_READY_MASK);
+
+		eq->ci = hl_eq_inc_ptr(eq->ci);
+
+		hdev->asic_funcs->update_eq_ci(hdev, eq->ci);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * hl_irq_handler_dec_abnrm - Decoder error interrupt handler
+ * @irq: IRQ number
+ * @arg: pointer to decoder structure.
+ */
+irqreturn_t hl_irq_handler_dec_abnrm(int irq, void *arg)
+{
+	struct hl_dec *dec = arg;
+
+	schedule_work(&dec->completion_abnrm_work);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * hl_cq_init - main initialization function for an cq object
+ *
+ * @hdev: pointer to device structure
+ * @q: pointer to cq structure
+ * @hw_queue_id: The H/W queue ID this completion queue belongs to
+ *               HL_INVALID_QUEUE if cq is not attached to any specific queue
+ *
+ * Allocate dma-able memory for the completion queue and initialize fields
+ * Returns 0 on success
+ */
+int hl_cq_init(struct hl_device *hdev, struct hl_cq *q, u32 hw_queue_id)
+{
+	void *p;
+
+	p = hl_asic_dma_alloc_coherent(hdev, HL_CQ_SIZE_IN_BYTES, &q->bus_address,
+					GFP_KERNEL | __GFP_ZERO);
+	if (!p)
+		return -ENOMEM;
+
+	q->hdev = hdev;
+	q->kernel_address = p;
+	q->hw_queue_id = hw_queue_id;
+	q->ci = 0;
+	q->pi = 0;
+
+	atomic_set(&q->free_slots_cnt, HL_CQ_LENGTH);
+
+	return 0;
+}
+
+/**
+ * hl_cq_fini - destroy completion queue
+ *
+ * @hdev: pointer to device structure
+ * @q: pointer to cq structure
+ *
+ * Free the completion queue memory
+ */
+void hl_cq_fini(struct hl_device *hdev, struct hl_cq *q)
+{
+	hl_asic_dma_free_coherent(hdev, HL_CQ_SIZE_IN_BYTES, q->kernel_address, q->bus_address);
+}
+
+void hl_cq_reset(struct hl_device *hdev, struct hl_cq *q)
+{
+	q->ci = 0;
+	q->pi = 0;
+
+	atomic_set(&q->free_slots_cnt, HL_CQ_LENGTH);
+
+	/*
+	 * It's not enough to just reset the PI/CI because the H/W may have
+	 * written valid completion entries before it was halted and therefore
+	 * we need to clean the actual queues so we won't process old entries
+	 * when the device is operational again
+	 */
+
+	memset(q->kernel_address, 0, HL_CQ_SIZE_IN_BYTES);
+}
+
+/**
+ * hl_eq_init - main initialization function for an event queue object
+ *
+ * @hdev: pointer to device structure
+ * @q: pointer to eq structure
+ *
+ * Allocate dma-able memory for the event queue and initialize fields
+ * Returns 0 on success
+ */
+int hl_eq_init(struct hl_device *hdev, struct hl_eq *q)
+{
+	void *p;
+
+	p = hl_cpu_accessible_dma_pool_alloc(hdev, HL_EQ_SIZE_IN_BYTES, &q->bus_address);
+	if (!p)
+		return -ENOMEM;
+
+	q->hdev = hdev;
+	q->kernel_address = p;
+	q->ci = 0;
+	q->prev_eqe_index = 0;
+
+	return 0;
+}
+
+/**
+ * hl_eq_fini - destroy event queue
+ *
+ * @hdev: pointer to device structure
+ * @q: pointer to eq structure
+ *
+ * Free the event queue memory
+ */
+void hl_eq_fini(struct hl_device *hdev, struct hl_eq *q)
+{
+	flush_workqueue(hdev->eq_wq);
+
+	hl_cpu_accessible_dma_pool_free(hdev, HL_EQ_SIZE_IN_BYTES, q->kernel_address);
+}
+
+void hl_eq_reset(struct hl_device *hdev, struct hl_eq *q)
+{
+	q->ci = 0;
+	q->prev_eqe_index = 0;
+
+	/*
+	 * It's not enough to just reset the PI/CI because the H/W may have
+	 * written valid completion entries before it was halted and therefore
+	 * we need to clean the actual queues so we won't process old entries
+	 * when the device is operational again
+	 */
+
+	memset(q->kernel_address, 0, HL_EQ_SIZE_IN_BYTES);
+}