Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block

[linux/fpc-iii.git] / drivers / misc / habanalabs / common / habanalabs.h

/* SPDX-License-Identifier: GPL-2.0
 *
 * Copyright 2016-2019 HabanaLabs, Ltd.
 * All Rights Reserved.
 *
 */

#ifndef HABANALABSP_H_
#define HABANALABSP_H_

#include "../include/common/cpucp_if.h"
#include "../include/common/qman_if.h"
#include "../include/hw_ip/mmu/mmu_general.h"
#include <uapi/misc/habanalabs.h>

#include <linux/cdev.h>
#include <linux/iopoll.h>
#include <linux/irqreturn.h>
#include <linux/dma-direction.h>
#include <linux/scatterlist.h>
#include <linux/hashtable.h>
#include <linux/bitfield.h>
#include <linux/genalloc.h>
#include <linux/sched/signal.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/coresight.h>

#define HL_NAME                         "habanalabs"

/* Use upper bits of mmap offset to store habana driver specific information.
 * bits[63:62] - Encode mmap type
 * bits[45:0]  - mmap offset value
 *
 * NOTE: struct vm_area_struct.vm_pgoff uses offset in pages. Hence, these
 *  defines are w.r.t to PAGE_SIZE
 */
#define HL_MMAP_TYPE_SHIFT              (62 - PAGE_SHIFT)
#define HL_MMAP_TYPE_MASK               (0x3ull << HL_MMAP_TYPE_SHIFT)
#define HL_MMAP_TYPE_CB                 (0x2ull << HL_MMAP_TYPE_SHIFT)

#define HL_MMAP_OFFSET_VALUE_MASK       (0x3FFFFFFFFFFFull >> PAGE_SHIFT)
#define HL_MMAP_OFFSET_VALUE_GET(off)   (off & HL_MMAP_OFFSET_VALUE_MASK)

#define HL_PENDING_RESET_PER_SEC        10
#define HL_PENDING_RESET_MAX_TRIALS     60 /* 10 minutes */
#define HL_PENDING_RESET_LONG_SEC       60

#define HL_HARD_RESET_MAX_TIMEOUT       120

#define HL_DEVICE_TIMEOUT_USEC          1000000 /* 1 s */

#define HL_HEARTBEAT_PER_USEC           5000000 /* 5 s */

#define HL_PLL_LOW_JOB_FREQ_USEC        5000000 /* 5 s */

#define HL_CPUCP_INFO_TIMEOUT_USEC      10000000 /* 10s */
#define HL_CPUCP_EEPROM_TIMEOUT_USEC    10000000 /* 10s */

#define HL_PCI_ELBI_TIMEOUT_MSEC        10 /* 10ms */

#define HL_SIM_MAX_TIMEOUT_US           10000000 /* 10s */

#define HL_IDLE_BUSY_TS_ARR_SIZE        4096

/* Memory */
#define MEM_HASH_TABLE_BITS             7 /* 1 << 7 buckets */

/* MMU */
#define MMU_HASH_TABLE_BITS             7 /* 1 << 7 buckets */

/**
 * enum hl_mmu_page_table_locaion - mmu page table location
 * @MMU_DR_PGT: page-table is located on device DRAM.
 * @MMU_HR_PGT: page-table is located on host memory.
 * @MMU_NUM_PGT_LOCATIONS: number of page-table locations currently supported.
 */
enum hl_mmu_page_table_location {
        MMU_DR_PGT = 0,         /* device-dram-resident MMU PGT */
        MMU_HR_PGT,             /* host resident MMU PGT */
        MMU_NUM_PGT_LOCATIONS   /* num of PGT locations */
};

/*
 * HL_RSVD_SOBS 'sync stream' reserved sync objects per QMAN stream
 * HL_RSVD_MONS 'sync stream' reserved monitors per QMAN stream
 */
#define HL_RSVD_SOBS                    2
#define HL_RSVD_MONS                    1

/*
 * HL_COLLECTIVE_RSVD_MSTR_MONS 'collective' reserved monitors per QMAN stream
 */
#define HL_COLLECTIVE_RSVD_MSTR_MONS    2

#define HL_MAX_SOB_VAL                  (1 << 15)

#define IS_POWER_OF_2(n)                (n != 0 && ((n & (n - 1)) == 0))
#define IS_MAX_PENDING_CS_VALID(n)      (IS_POWER_OF_2(n) && (n > 1))

#define HL_PCI_NUM_BARS                 6

#define HL_MAX_DCORES                   4

#define HL_MAX_SOBS_PER_MONITOR 8

/**
 * struct hl_gen_wait_properties - properties for generating a wait CB
 * @data: command buffer
 * @q_idx: queue id is used to extract fence register address
 * @size: offset in command buffer
 * @sob_base: SOB base to use in this wait CB
 * @sob_val: SOB value to wait for
 * @mon_id: monitor to use in this wait CB
 * @sob_mask: each bit represents a SOB offset from sob_base to be used
 */
struct hl_gen_wait_properties {
        void    *data;
        u32     q_idx;
        u32     size;
        u16     sob_base;
        u16     sob_val;
        u16     mon_id;
        u8      sob_mask;
};

/**
 * struct pgt_info - MMU hop page info.
 * @node: hash linked-list node for the pgts shadow hash of pgts.
 * @phys_addr: physical address of the pgt.
 * @shadow_addr: shadow hop in the host.
 * @ctx: pointer to the owner ctx.
 * @num_of_ptes: indicates how many ptes are used in the pgt.
 *
 * The MMU page tables hierarchy is placed on the DRAM. When a new level (hop)
 * is needed during mapping, a new page is allocated and this structure holds
 * its essential information. During unmapping, if no valid PTEs remained in the
 * page, it is freed with its pgt_info structure.
 */
struct pgt_info {
        struct hlist_node       node;
        u64                     phys_addr;
        u64                     shadow_addr;
        struct hl_ctx           *ctx;
        int                     num_of_ptes;
};

struct hl_device;
struct hl_fpriv;

/**
 * enum hl_pci_match_mode - pci match mode per region
 * @PCI_ADDRESS_MATCH_MODE: address match mode
 * @PCI_BAR_MATCH_MODE: bar match mode
 */
enum hl_pci_match_mode {
        PCI_ADDRESS_MATCH_MODE,
        PCI_BAR_MATCH_MODE
};

/**
 * enum hl_fw_component - F/W components to read version through registers.
 * @FW_COMP_UBOOT: u-boot.
 * @FW_COMP_PREBOOT: preboot.
 */
enum hl_fw_component {
        FW_COMP_UBOOT,
        FW_COMP_PREBOOT
};

/**
 * enum hl_fw_types - F/W types to load
 * @FW_TYPE_LINUX: Linux image for device CPU
 * @FW_TYPE_BOOT_CPU: Boot image for device CPU
 * @FW_TYPE_ALL_TYPES: Mask for all types
 */
enum hl_fw_types {
        FW_TYPE_LINUX = 0x1,
        FW_TYPE_BOOT_CPU = 0x2,
        FW_TYPE_ALL_TYPES = (FW_TYPE_LINUX | FW_TYPE_BOOT_CPU)
};

/**
 * enum hl_queue_type - Supported QUEUE types.
 * @QUEUE_TYPE_NA: queue is not available.
 * @QUEUE_TYPE_EXT: external queue which is a DMA channel that may access the
 *                  host.
 * @QUEUE_TYPE_INT: internal queue that performs DMA inside the device's
 *                      memories and/or operates the compute engines.
 * @QUEUE_TYPE_CPU: S/W queue for communication with the device's CPU.
 * @QUEUE_TYPE_HW: queue of DMA and compute engines jobs, for which completion
 *                 notifications are sent by H/W.
 */
enum hl_queue_type {
        QUEUE_TYPE_NA,
        QUEUE_TYPE_EXT,
        QUEUE_TYPE_INT,
        QUEUE_TYPE_CPU,
        QUEUE_TYPE_HW
};

enum hl_cs_type {
        CS_TYPE_DEFAULT,
        CS_TYPE_SIGNAL,
        CS_TYPE_WAIT,
        CS_TYPE_COLLECTIVE_WAIT
};

/*
 * struct hl_inbound_pci_region - inbound region descriptor
 * @mode: pci match mode for this region
 * @addr: region target address
 * @size: region size in bytes
 * @offset_in_bar: offset within bar (address match mode)
 * @bar: bar id
 */
struct hl_inbound_pci_region {
        enum hl_pci_match_mode  mode;
        u64                     addr;
        u64                     size;
        u64                     offset_in_bar;
        u8                      bar;
};

/*
 * struct hl_outbound_pci_region - outbound region descriptor
 * @addr: region target address
 * @size: region size in bytes
 */
struct hl_outbound_pci_region {
        u64     addr;
        u64     size;
};

/*
 * enum queue_cb_alloc_flags - Indicates queue support for CBs that
 * allocated by Kernel or by User
 * @CB_ALLOC_KERNEL: support only CBs that allocated by Kernel
 * @CB_ALLOC_USER: support only CBs that allocated by User
 */
enum queue_cb_alloc_flags {
        CB_ALLOC_KERNEL = 0x1,
        CB_ALLOC_USER   = 0x2
};

/*
 * struct hl_hw_sob - H/W SOB info.
 * @hdev: habanalabs device structure.
 * @kref: refcount of this SOB. The SOB will reset once the refcount is zero.
 * @sob_id: id of this SOB.
 * @q_idx: the H/W queue that uses this SOB.
 */
struct hl_hw_sob {
        struct hl_device        *hdev;
        struct kref             kref;
        u32                     sob_id;
        u32                     q_idx;
};

enum hl_collective_mode {
        HL_COLLECTIVE_NOT_SUPPORTED = 0x0,
        HL_COLLECTIVE_MASTER = 0x1,
        HL_COLLECTIVE_SLAVE = 0x2
};

/**
 * struct hw_queue_properties - queue information.
 * @type: queue type.
 * @queue_cb_alloc_flags: bitmap which indicates if the hw queue supports CB
 *                        that allocated by the Kernel driver and therefore,
 *                        a CB handle can be provided for jobs on this queue.
 *                        Otherwise, a CB address must be provided.
 * @collective_mode: collective mode of current queue
 * @driver_only: true if only the driver is allowed to send a job to this queue,
 *               false otherwise.
 * @supports_sync_stream: True if queue supports sync stream
 */
struct hw_queue_properties {
        enum hl_queue_type      type;
        enum queue_cb_alloc_flags cb_alloc_flags;
        enum hl_collective_mode collective_mode;
        u8                      driver_only;
        u8                      supports_sync_stream;
};

/**
 * enum vm_type_t - virtual memory mapping request information.
 * @VM_TYPE_USERPTR: mapping of user memory to device virtual address.
 * @VM_TYPE_PHYS_PACK: mapping of DRAM memory to device virtual address.
 */
enum vm_type_t {
        VM_TYPE_USERPTR = 0x1,
        VM_TYPE_PHYS_PACK = 0x2
};

/**
 * enum hl_device_hw_state - H/W device state. use this to understand whether
 *                           to do reset before hw_init or not
 * @HL_DEVICE_HW_STATE_CLEAN: H/W state is clean. i.e. after hard reset
 * @HL_DEVICE_HW_STATE_DIRTY: H/W state is dirty. i.e. we started to execute
 *                            hw_init
 */
enum hl_device_hw_state {
        HL_DEVICE_HW_STATE_CLEAN = 0,
        HL_DEVICE_HW_STATE_DIRTY
};

#define HL_MMU_VA_ALIGNMENT_NOT_NEEDED 0

/**
 * struct hl_mmu_properties - ASIC specific MMU address translation properties.
 * @start_addr: virtual start address of the memory region.
 * @end_addr: virtual end address of the memory region.
 * @hop0_shift: shift of hop 0 mask.
 * @hop1_shift: shift of hop 1 mask.
 * @hop2_shift: shift of hop 2 mask.
 * @hop3_shift: shift of hop 3 mask.
 * @hop4_shift: shift of hop 4 mask.
 * @hop5_shift: shift of hop 5 mask.
 * @hop0_mask: mask to get the PTE address in hop 0.
 * @hop1_mask: mask to get the PTE address in hop 1.
 * @hop2_mask: mask to get the PTE address in hop 2.
 * @hop3_mask: mask to get the PTE address in hop 3.
 * @hop4_mask: mask to get the PTE address in hop 4.
 * @hop5_mask: mask to get the PTE address in hop 5.
 * @page_size: default page size used to allocate memory.
 * @num_hops: The amount of hops supported by the translation table.
 * @host_resident: Should the MMU page table reside in host memory or in the
 *                 device DRAM.
 */
struct hl_mmu_properties {
        u64     start_addr;
        u64     end_addr;
        u64     hop0_shift;
        u64     hop1_shift;
        u64     hop2_shift;
        u64     hop3_shift;
        u64     hop4_shift;
        u64     hop5_shift;
        u64     hop0_mask;
        u64     hop1_mask;
        u64     hop2_mask;
        u64     hop3_mask;
        u64     hop4_mask;
        u64     hop5_mask;
        u32     page_size;
        u32     num_hops;
        u8      host_resident;
};

/**
 * struct asic_fixed_properties - ASIC specific immutable properties.
 * @hw_queues_props: H/W queues properties.
 * @cpucp_info: received various information from CPU-CP regarding the H/W, e.g.
 *              available sensors.
 * @uboot_ver: F/W U-boot version.
 * @preboot_ver: F/W Preboot version.
 * @dmmu: DRAM MMU address translation properties.
 * @pmmu: PCI (host) MMU address translation properties.
 * @pmmu_huge: PCI (host) MMU address translation properties for memory
 *              allocated with huge pages.
 * @sram_base_address: SRAM physical start address.
 * @sram_end_address: SRAM physical end address.
 * @sram_user_base_address - SRAM physical start address for user access.
 * @dram_base_address: DRAM physical start address.
 * @dram_end_address: DRAM physical end address.
 * @dram_user_base_address: DRAM physical start address for user access.
 * @dram_size: DRAM total size.
 * @dram_pci_bar_size: size of PCI bar towards DRAM.
 * @max_power_default: max power of the device after reset
 * @dram_size_for_default_page_mapping: DRAM size needed to map to avoid page
 *                                      fault.
 * @pcie_dbi_base_address: Base address of the PCIE_DBI block.
 * @pcie_aux_dbi_reg_addr: Address of the PCIE_AUX DBI register.
 * @mmu_pgt_addr: base physical address in DRAM of MMU page tables.
 * @mmu_dram_default_page_addr: DRAM default page physical address.
 * @cb_va_start_addr: virtual start address of command buffers which are mapped
 *                    to the device's MMU.
 * @cb_va_end_addr: virtual end address of command buffers which are mapped to
 *                  the device's MMU.
 * @mmu_pgt_size: MMU page tables total size.
 * @mmu_pte_size: PTE size in MMU page tables.
 * @mmu_hop_table_size: MMU hop table size.
 * @mmu_hop0_tables_total_size: total size of MMU hop0 tables.
 * @dram_page_size: page size for MMU DRAM allocation.
 * @cfg_size: configuration space size on SRAM.
 * @sram_size: total size of SRAM.
 * @max_asid: maximum number of open contexts (ASIDs).
 * @num_of_events: number of possible internal H/W IRQs.
 * @psoc_pci_pll_nr: PCI PLL NR value.
 * @psoc_pci_pll_nf: PCI PLL NF value.
 * @psoc_pci_pll_od: PCI PLL OD value.
 * @psoc_pci_pll_div_factor: PCI PLL DIV FACTOR 1 value.
 * @psoc_timestamp_frequency: frequency of the psoc timestamp clock.
 * @high_pll: high PLL frequency used by the device.
 * @cb_pool_cb_cnt: number of CBs in the CB pool.
 * @cb_pool_cb_size: size of each CB in the CB pool.
 * @max_pending_cs: maximum of concurrent pending command submissions
 * @max_queues: maximum amount of queues in the system
 * @fw_boot_cpu_security_map: bitmap representation of boot cpu security status
 *                            reported by FW, bit description can be found in
 *                            CPU_BOOT_DEV_STS*
 * @fw_app_security_map: bitmap representation of application security status
 *                       reported by FW, bit description can be found in
 *                       CPU_BOOT_DEV_STS*
 * @collective_first_sob: first sync object available for collective use
 * @collective_first_mon: first monitor available for collective use
 * @sync_stream_first_sob: first sync object available for sync stream use
 * @sync_stream_first_mon: first monitor available for sync stream use
 * @first_available_user_sob: first sob available for the user
 * @first_available_user_mon: first monitor available for the user
 * @tpc_enabled_mask: which TPCs are enabled.
 * @completion_queues_count: number of completion queues.
 * @fw_security_disabled: true if security measures are disabled in firmware,
 *                        false otherwise
 * @fw_security_status_valid: security status bits are valid and can be fetched
 *                            from BOOT_DEV_STS0
 * @dram_supports_virtual_memory: is there an MMU towards the DRAM
 * @hard_reset_done_by_fw: true if firmware is handling hard reset flow
 */
struct asic_fixed_properties {
        struct hw_queue_properties      *hw_queues_props;
        struct cpucp_info               cpucp_info;
        char                            uboot_ver[VERSION_MAX_LEN];
        char                            preboot_ver[VERSION_MAX_LEN];
        struct hl_mmu_properties        dmmu;
        struct hl_mmu_properties        pmmu;
        struct hl_mmu_properties        pmmu_huge;
        u64                             sram_base_address;
        u64                             sram_end_address;
        u64                             sram_user_base_address;
        u64                             dram_base_address;
        u64                             dram_end_address;
        u64                             dram_user_base_address;
        u64                             dram_size;
        u64                             dram_pci_bar_size;
        u64                             max_power_default;
        u64                             dram_size_for_default_page_mapping;
        u64                             pcie_dbi_base_address;
        u64                             pcie_aux_dbi_reg_addr;
        u64                             mmu_pgt_addr;
        u64                             mmu_dram_default_page_addr;
        u64                             cb_va_start_addr;
        u64                             cb_va_end_addr;
        u32                             mmu_pgt_size;
        u32                             mmu_pte_size;
        u32                             mmu_hop_table_size;
        u32                             mmu_hop0_tables_total_size;
        u32                             dram_page_size;
        u32                             cfg_size;
        u32                             sram_size;
        u32                             max_asid;
        u32                             num_of_events;
        u32                             psoc_pci_pll_nr;
        u32                             psoc_pci_pll_nf;
        u32                             psoc_pci_pll_od;
        u32                             psoc_pci_pll_div_factor;
        u32                             psoc_timestamp_frequency;
        u32                             high_pll;
        u32                             cb_pool_cb_cnt;
        u32                             cb_pool_cb_size;
        u32                             max_pending_cs;
        u32                             max_queues;
        u32                             fw_boot_cpu_security_map;
        u32                             fw_app_security_map;
        u16                             collective_first_sob;
        u16                             collective_first_mon;
        u16                             sync_stream_first_sob;
        u16                             sync_stream_first_mon;
        u16                             first_available_user_sob[HL_MAX_DCORES];
        u16                             first_available_user_mon[HL_MAX_DCORES];
        u8                              tpc_enabled_mask;
        u8                              completion_queues_count;
        u8                              fw_security_disabled;
        u8                              fw_security_status_valid;
        u8                              dram_supports_virtual_memory;
        u8                              hard_reset_done_by_fw;
};

/**
 * struct hl_fence - software synchronization primitive
 * @completion: fence is implemented using completion
 * @refcount: refcount for this fence
 * @error: mark this fence with error
 * @timestamp: timestamp upon completion
 *
 */
struct hl_fence {
        struct completion       completion;
        struct kref             refcount;
        int                     error;
        ktime_t                 timestamp;
};

/**
 * struct hl_cs_compl - command submission completion object.
 * @base_fence: hl fence object.
 * @lock: spinlock to protect fence.
 * @hdev: habanalabs device structure.
 * @hw_sob: the H/W SOB used in this signal/wait CS.
 * @cs_seq: command submission sequence number.
 * @type: type of the CS - signal/wait.
 * @sob_val: the SOB value that is used in this signal/wait CS.
 * @sob_group: the SOB group that is used in this collective wait CS.
 */
struct hl_cs_compl {
        struct hl_fence         base_fence;
        spinlock_t              lock;
        struct hl_device        *hdev;
        struct hl_hw_sob        *hw_sob;
        u64                     cs_seq;
        enum hl_cs_type         type;
        u16                     sob_val;
        u16                     sob_group;
};

/*
 * Command Buffers
 */

/**
 * struct hl_cb_mgr - describes a Command Buffer Manager.
 * @cb_lock: protects cb_handles.
 * @cb_handles: an idr to hold all command buffer handles.
 */
struct hl_cb_mgr {
        spinlock_t              cb_lock;
        struct idr              cb_handles; /* protected by cb_lock */
};

/**
 * struct hl_cb - describes a Command Buffer.
 * @refcount: reference counter for usage of the CB.
 * @hdev: pointer to device this CB belongs to.
 * @ctx: pointer to the CB owner's context.
 * @lock: spinlock to protect mmap flows.
 * @debugfs_list: node in debugfs list of command buffers.
 * @pool_list: node in pool list of command buffers.
 * @va_block_list: list of virtual addresses blocks of the CB if it is mapped to
 *                 the device's MMU.
 * @id: the CB's ID.
 * @kernel_address: Holds the CB's kernel virtual address.
 * @bus_address: Holds the CB's DMA address.
 * @mmap_size: Holds the CB's size that was mmaped.
 * @size: holds the CB's size.
 * @cs_cnt: holds number of CS that this CB participates in.
 * @mmap: true if the CB is currently mmaped to user.
 * @is_pool: true if CB was acquired from the pool, false otherwise.
 * @is_internal: internaly allocated
 * @is_mmu_mapped: true if the CB is mapped to the device's MMU.
 */
struct hl_cb {
        struct kref             refcount;
        struct hl_device        *hdev;
        struct hl_ctx           *ctx;
        spinlock_t              lock;
        struct list_head        debugfs_list;
        struct list_head        pool_list;
        struct list_head        va_block_list;
        u64                     id;
        void                    *kernel_address;
        dma_addr_t              bus_address;
        u32                     mmap_size;
        u32                     size;
        atomic_t                cs_cnt;
        u8                      mmap;
        u8                      is_pool;
        u8                      is_internal;
        u8                      is_mmu_mapped;
};


/*
 * QUEUES
 */

struct hl_cs;
struct hl_cs_job;

/* Queue length of external and HW queues */
#define HL_QUEUE_LENGTH                 4096
#define HL_QUEUE_SIZE_IN_BYTES          (HL_QUEUE_LENGTH * HL_BD_SIZE)

#if (HL_MAX_JOBS_PER_CS > HL_QUEUE_LENGTH)
#error "HL_QUEUE_LENGTH must be greater than HL_MAX_JOBS_PER_CS"
#endif

/* HL_CQ_LENGTH is in units of struct hl_cq_entry */
#define HL_CQ_LENGTH                    HL_QUEUE_LENGTH
#define HL_CQ_SIZE_IN_BYTES             (HL_CQ_LENGTH * HL_CQ_ENTRY_SIZE)

/* Must be power of 2 */
#define HL_EQ_LENGTH                    64
#define HL_EQ_SIZE_IN_BYTES             (HL_EQ_LENGTH * HL_EQ_ENTRY_SIZE)

/* Host <-> CPU-CP shared memory size */
#define HL_CPU_ACCESSIBLE_MEM_SIZE      SZ_2M

/**
 * struct hl_sync_stream_properties -
 *     describes a H/W queue sync stream properties
 * @hw_sob: array of the used H/W SOBs by this H/W queue.
 * @next_sob_val: the next value to use for the currently used SOB.
 * @base_sob_id: the base SOB id of the SOBs used by this queue.
 * @base_mon_id: the base MON id of the MONs used by this queue.
 * @collective_mstr_mon_id: the MON ids of the MONs used by this master queue
 *                          in order to sync with all slave queues.
 * @collective_slave_mon_id: the MON id used by this slave queue in order to
 *                           sync with its master queue.
 * @collective_sob_id: current SOB id used by this collective slave queue
 *                     to signal its collective master queue upon completion.
 * @curr_sob_offset: the id offset to the currently used SOB from the
 *                   HL_RSVD_SOBS that are being used by this queue.
 */
struct hl_sync_stream_properties {
        struct hl_hw_sob hw_sob[HL_RSVD_SOBS];
        u16             next_sob_val;
        u16             base_sob_id;
        u16             base_mon_id;
        u16             collective_mstr_mon_id[HL_COLLECTIVE_RSVD_MSTR_MONS];
        u16             collective_slave_mon_id;
        u16             collective_sob_id;
        u8              curr_sob_offset;
};

/**
 * struct hl_hw_queue - describes a H/W transport queue.
 * @shadow_queue: pointer to a shadow queue that holds pointers to jobs.
 * @sync_stream_prop: sync stream queue properties
 * @queue_type: type of queue.
 * @collective_mode: collective mode of current queue
 * @kernel_address: holds the queue's kernel virtual address.
 * @bus_address: holds the queue's DMA address.
 * @pi: holds the queue's pi value.
 * @ci: holds the queue's ci value, AS CALCULATED BY THE DRIVER (not real ci).
 * @hw_queue_id: the id of the H/W queue.
 * @cq_id: the id for the corresponding CQ for this H/W queue.
 * @msi_vec: the IRQ number of the H/W queue.
 * @int_queue_len: length of internal queue (number of entries).
 * @valid: is the queue valid (we have array of 32 queues, not all of them
 *         exist).
 * @supports_sync_stream: True if queue supports sync stream
 */
struct hl_hw_queue {
        struct hl_cs_job                        **shadow_queue;
        struct hl_sync_stream_properties        sync_stream_prop;
        enum hl_queue_type                      queue_type;
        enum hl_collective_mode                 collective_mode;
        void                                    *kernel_address;
        dma_addr_t                              bus_address;
        u32                                     pi;
        atomic_t                                ci;
        u32                                     hw_queue_id;
        u32                                     cq_id;
        u32                                     msi_vec;
        u16                                     int_queue_len;
        u8                                      valid;
        u8                                      supports_sync_stream;
};

/**
 * struct hl_cq - describes a completion queue
 * @hdev: pointer to the device structure
 * @kernel_address: holds the queue's kernel virtual address
 * @bus_address: holds the queue's DMA address
 * @cq_idx: completion queue index in array
 * @hw_queue_id: the id of the matching H/W queue
 * @ci: ci inside the queue
 * @pi: pi inside the queue
 * @free_slots_cnt: counter of free slots in queue
 */
struct hl_cq {
        struct hl_device        *hdev;
        void                    *kernel_address;
        dma_addr_t              bus_address;
        u32                     cq_idx;
        u32                     hw_queue_id;
        u32                     ci;
        u32                     pi;
        atomic_t                free_slots_cnt;
};

/**
 * struct hl_eq - describes the event queue (single one per device)
 * @hdev: pointer to the device structure
 * @kernel_address: holds the queue's kernel virtual address
 * @bus_address: holds the queue's DMA address
 * @ci: ci inside the queue
 */
struct hl_eq {
        struct hl_device        *hdev;
        void                    *kernel_address;
        dma_addr_t              bus_address;
        u32                     ci;
};


/*
 * ASICs
 */

/**
 * enum hl_asic_type - supported ASIC types.
 * @ASIC_INVALID: Invalid ASIC type.
 * @ASIC_GOYA: Goya device.
 * @ASIC_GAUDI: Gaudi device.
 */
enum hl_asic_type {
        ASIC_INVALID,
        ASIC_GOYA,
        ASIC_GAUDI
};

struct hl_cs_parser;

/**
 * enum hl_pm_mng_profile - power management profile.
 * @PM_AUTO: internal clock is set by the Linux driver.
 * @PM_MANUAL: internal clock is set by the user.
 * @PM_LAST: last power management type.
 */
enum hl_pm_mng_profile {
        PM_AUTO = 1,
        PM_MANUAL,
        PM_LAST
};

/**
 * enum hl_pll_frequency - PLL frequency.
 * @PLL_HIGH: high frequency.
 * @PLL_LOW: low frequency.
 * @PLL_LAST: last frequency values that were configured by the user.
 */
enum hl_pll_frequency {
        PLL_HIGH = 1,
        PLL_LOW,
        PLL_LAST
};

#define PLL_REF_CLK 50

enum div_select_defs {
        DIV_SEL_REF_CLK = 0,
        DIV_SEL_PLL_CLK = 1,
        DIV_SEL_DIVIDED_REF = 2,
        DIV_SEL_DIVIDED_PLL = 3,
};

/**
 * struct hl_asic_funcs - ASIC specific functions that are can be called from
 *                        common code.
 * @early_init: sets up early driver state (pre sw_init), doesn't configure H/W.
 * @early_fini: tears down what was done in early_init.
 * @late_init: sets up late driver/hw state (post hw_init) - Optional.
 * @late_fini: tears down what was done in late_init (pre hw_fini) - Optional.
 * @sw_init: sets up driver state, does not configure H/W.
 * @sw_fini: tears down driver state, does not configure H/W.
 * @hw_init: sets up the H/W state.
 * @hw_fini: tears down the H/W state.
 * @halt_engines: halt engines, needed for reset sequence. This also disables
 *                interrupts from the device. Should be called before
 *                hw_fini and before CS rollback.
 * @suspend: handles IP specific H/W or SW changes for suspend.
 * @resume: handles IP specific H/W or SW changes for resume.
 * @cb_mmap: maps a CB.
 * @ring_doorbell: increment PI on a given QMAN.
 * @pqe_write: Write the PQ entry to the PQ. This is ASIC-specific
 *             function because the PQs are located in different memory areas
 *             per ASIC (SRAM, DRAM, Host memory) and therefore, the method of
 *             writing the PQE must match the destination memory area
 *             properties.
 * @asic_dma_alloc_coherent: Allocate coherent DMA memory by calling
 *                           dma_alloc_coherent(). This is ASIC function because
 *                           its implementation is not trivial when the driver
 *                           is loaded in simulation mode (not upstreamed).
 * @asic_dma_free_coherent:  Free coherent DMA memory by calling
 *                           dma_free_coherent(). This is ASIC function because
 *                           its implementation is not trivial when the driver
 *                           is loaded in simulation mode (not upstreamed).
 * @scrub_device_mem: Scrub device memory given an address and size
 * @get_int_queue_base: get the internal queue base address.
 * @test_queues: run simple test on all queues for sanity check.
 * @asic_dma_pool_zalloc: small DMA allocation of coherent memory from DMA pool.
 *                        size of allocation is HL_DMA_POOL_BLK_SIZE.
 * @asic_dma_pool_free: free small DMA allocation from pool.
 * @cpu_accessible_dma_pool_alloc: allocate CPU PQ packet from DMA pool.
 * @cpu_accessible_dma_pool_free: free CPU PQ packet from DMA pool.
 * @hl_dma_unmap_sg: DMA unmap scatter-gather list.
 * @cs_parser: parse Command Submission.
 * @asic_dma_map_sg: DMA map scatter-gather list.
 * @get_dma_desc_list_size: get number of LIN_DMA packets required for CB.
 * @add_end_of_cb_packets: Add packets to the end of CB, if device requires it.
 * @update_eq_ci: update event queue CI.
 * @context_switch: called upon ASID context switch.
 * @restore_phase_topology: clear all SOBs amd MONs.
 * @debugfs_read32: debug interface for reading u32 from DRAM/SRAM.
 * @debugfs_write32: debug interface for writing u32 to DRAM/SRAM.
 * @add_device_attr: add ASIC specific device attributes.
 * @handle_eqe: handle event queue entry (IRQ) from CPU-CP.
 * @set_pll_profile: change PLL profile (manual/automatic).
 * @get_events_stat: retrieve event queue entries histogram.
 * @read_pte: read MMU page table entry from DRAM.
 * @write_pte: write MMU page table entry to DRAM.
 * @mmu_invalidate_cache: flush MMU STLB host/DRAM cache, either with soft
 *                        (L1 only) or hard (L0 & L1) flush.
 * @mmu_invalidate_cache_range: flush specific MMU STLB cache lines with
 *                              ASID-VA-size mask.
 * @send_heartbeat: send is-alive packet to CPU-CP and verify response.
 * @set_clock_gating: enable/disable clock gating per engine according to
 *                    clock gating mask in hdev
 * @disable_clock_gating: disable clock gating completely
 * @debug_coresight: perform certain actions on Coresight for debugging.
 * @is_device_idle: return true if device is idle, false otherwise.
 * @soft_reset_late_init: perform certain actions needed after soft reset.
 * @hw_queues_lock: acquire H/W queues lock.
 * @hw_queues_unlock: release H/W queues lock.
 * @get_pci_id: retrieve PCI ID.
 * @get_eeprom_data: retrieve EEPROM data from F/W.
 * @send_cpu_message: send message to F/W. If the message is timedout, the
 *                    driver will eventually reset the device. The timeout can
 *                    be determined by the calling function or it can be 0 and
 *                    then the timeout is the default timeout for the specific
 *                    ASIC
 * @get_hw_state: retrieve the H/W state
 * @pci_bars_map: Map PCI BARs.
 * @init_iatu: Initialize the iATU unit inside the PCI controller.
 * @rreg: Read a register. Needed for simulator support.
 * @wreg: Write a register. Needed for simulator support.
 * @halt_coresight: stop the ETF and ETR traces.
 * @ctx_init: context dependent initialization.
 * @ctx_fini: context dependent cleanup.
 * @get_clk_rate: Retrieve the ASIC current and maximum clock rate in MHz
 * @get_queue_id_for_cq: Get the H/W queue id related to the given CQ index.
 * @read_device_fw_version: read the device's firmware versions that are
 *                          contained in registers
 * @load_firmware_to_device: load the firmware to the device's memory
 * @load_boot_fit_to_device: load boot fit to device's memory
 * @get_signal_cb_size: Get signal CB size.
 * @get_wait_cb_size: Get wait CB size.
 * @gen_signal_cb: Generate a signal CB.
 * @gen_wait_cb: Generate a wait CB.
 * @reset_sob: Reset a SOB.
 * @reset_sob_group: Reset SOB group
 * @set_dma_mask_from_fw: set the DMA mask in the driver according to the
 *                        firmware configuration
 * @get_device_time: Get the device time.
 * @collective_wait_init_cs: Generate collective master/slave packets
 *                           and place them in the relevant cs jobs
 * @collective_wait_create_jobs: allocate collective wait cs jobs
 */
struct hl_asic_funcs {
        int (*early_init)(struct hl_device *hdev);
        int (*early_fini)(struct hl_device *hdev);
        int (*late_init)(struct hl_device *hdev);
        void (*late_fini)(struct hl_device *hdev);
        int (*sw_init)(struct hl_device *hdev);
        int (*sw_fini)(struct hl_device *hdev);
        int (*hw_init)(struct hl_device *hdev);
        void (*hw_fini)(struct hl_device *hdev, bool hard_reset);
        void (*halt_engines)(struct hl_device *hdev, bool hard_reset);
        int (*suspend)(struct hl_device *hdev);
        int (*resume)(struct hl_device *hdev);
        int (*cb_mmap)(struct hl_device *hdev, struct vm_area_struct *vma,
                        void *cpu_addr, dma_addr_t dma_addr, size_t size);
        void (*ring_doorbell)(struct hl_device *hdev, u32 hw_queue_id, u32 pi);
        void (*pqe_write)(struct hl_device *hdev, __le64 *pqe,
                        struct hl_bd *bd);
        void* (*asic_dma_alloc_coherent)(struct hl_device *hdev, size_t size,
                                        dma_addr_t *dma_handle, gfp_t flag);
        void (*asic_dma_free_coherent)(struct hl_device *hdev, size_t size,
                                        void *cpu_addr, dma_addr_t dma_handle);
        int (*scrub_device_mem)(struct hl_device *hdev, u64 addr, u64 size);
        void* (*get_int_queue_base)(struct hl_device *hdev, u32 queue_id,
                                dma_addr_t *dma_handle, u16 *queue_len);
        int (*test_queues)(struct hl_device *hdev);
        void* (*asic_dma_pool_zalloc)(struct hl_device *hdev, size_t size,
                                gfp_t mem_flags, dma_addr_t *dma_handle);
        void (*asic_dma_pool_free)(struct hl_device *hdev, void *vaddr,
                                dma_addr_t dma_addr);
        void* (*cpu_accessible_dma_pool_alloc)(struct hl_device *hdev,
                                size_t size, dma_addr_t *dma_handle);
        void (*cpu_accessible_dma_pool_free)(struct hl_device *hdev,
                                size_t size, void *vaddr);
        void (*hl_dma_unmap_sg)(struct hl_device *hdev,
                                struct scatterlist *sgl, int nents,
                                enum dma_data_direction dir);
        int (*cs_parser)(struct hl_device *hdev, struct hl_cs_parser *parser);
        int (*asic_dma_map_sg)(struct hl_device *hdev,
                                struct scatterlist *sgl, int nents,
                                enum dma_data_direction dir);
        u32 (*get_dma_desc_list_size)(struct hl_device *hdev,
                                        struct sg_table *sgt);
        void (*add_end_of_cb_packets)(struct hl_device *hdev,
                                        void *kernel_address, u32 len,
                                        u64 cq_addr, u32 cq_val, u32 msix_num,
                                        bool eb);
        void (*update_eq_ci)(struct hl_device *hdev, u32 val);
        int (*context_switch)(struct hl_device *hdev, u32 asid);
        void (*restore_phase_topology)(struct hl_device *hdev);
        int (*debugfs_read32)(struct hl_device *hdev, u64 addr, u32 *val);
        int (*debugfs_write32)(struct hl_device *hdev, u64 addr, u32 val);
        int (*debugfs_read64)(struct hl_device *hdev, u64 addr, u64 *val);
        int (*debugfs_write64)(struct hl_device *hdev, u64 addr, u64 val);
        void (*add_device_attr)(struct hl_device *hdev,
                                struct attribute_group *dev_attr_grp);
        void (*handle_eqe)(struct hl_device *hdev,
                                struct hl_eq_entry *eq_entry);
        void (*set_pll_profile)(struct hl_device *hdev,
                        enum hl_pll_frequency freq);
        void* (*get_events_stat)(struct hl_device *hdev, bool aggregate,
                                u32 *size);
        u64 (*read_pte)(struct hl_device *hdev, u64 addr);
        void (*write_pte)(struct hl_device *hdev, u64 addr, u64 val);
        int (*mmu_invalidate_cache)(struct hl_device *hdev, bool is_hard,
                                        u32 flags);
        int (*mmu_invalidate_cache_range)(struct hl_device *hdev, bool is_hard,
                        u32 asid, u64 va, u64 size);
        int (*send_heartbeat)(struct hl_device *hdev);
        void (*set_clock_gating)(struct hl_device *hdev);
        void (*disable_clock_gating)(struct hl_device *hdev);
        int (*debug_coresight)(struct hl_device *hdev, void *data);
        bool (*is_device_idle)(struct hl_device *hdev, u64 *mask,
                                struct seq_file *s);
        int (*soft_reset_late_init)(struct hl_device *hdev);
        void (*hw_queues_lock)(struct hl_device *hdev);
        void (*hw_queues_unlock)(struct hl_device *hdev);
        u32 (*get_pci_id)(struct hl_device *hdev);
        int (*get_eeprom_data)(struct hl_device *hdev, void *data,
                                size_t max_size);
        int (*send_cpu_message)(struct hl_device *hdev, u32 *msg,
                                u16 len, u32 timeout, u64 *result);
        int (*pci_bars_map)(struct hl_device *hdev);
        int (*init_iatu)(struct hl_device *hdev);
        u32 (*rreg)(struct hl_device *hdev, u32 reg);
        void (*wreg)(struct hl_device *hdev, u32 reg, u32 val);
        void (*halt_coresight)(struct hl_device *hdev);
        int (*ctx_init)(struct hl_ctx *ctx);
        void (*ctx_fini)(struct hl_ctx *ctx);
        int (*get_clk_rate)(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk);
        u32 (*get_queue_id_for_cq)(struct hl_device *hdev, u32 cq_idx);
        int (*read_device_fw_version)(struct hl_device *hdev,
                                        enum hl_fw_component fwc);
        int (*load_firmware_to_device)(struct hl_device *hdev);
        int (*load_boot_fit_to_device)(struct hl_device *hdev);
        u32 (*get_signal_cb_size)(struct hl_device *hdev);
        u32 (*get_wait_cb_size)(struct hl_device *hdev);
        u32 (*gen_signal_cb)(struct hl_device *hdev, void *data, u16 sob_id,
                        u32 size, bool eb);
        u32 (*gen_wait_cb)(struct hl_device *hdev,
                        struct hl_gen_wait_properties *prop);
        void (*reset_sob)(struct hl_device *hdev, void *data);
        void (*reset_sob_group)(struct hl_device *hdev, u16 sob_group);
        void (*set_dma_mask_from_fw)(struct hl_device *hdev);
        u64 (*get_device_time)(struct hl_device *hdev);
        void (*collective_wait_init_cs)(struct hl_cs *cs);
        int (*collective_wait_create_jobs)(struct hl_device *hdev,
                        struct hl_ctx *ctx, struct hl_cs *cs, u32 wait_queue_id,
                        u32 collective_engine_id);
};


/*
 * CONTEXTS
 */

#define HL_KERNEL_ASID_ID       0

/**
 * enum hl_va_range_type - virtual address range type.
 * @HL_VA_RANGE_TYPE_HOST: range type of host pages
 * @HL_VA_RANGE_TYPE_HOST_HUGE: range type of host huge pages
 * @HL_VA_RANGE_TYPE_DRAM: range type of dram pages
 */
enum hl_va_range_type {
        HL_VA_RANGE_TYPE_HOST,
        HL_VA_RANGE_TYPE_HOST_HUGE,
        HL_VA_RANGE_TYPE_DRAM,
        HL_VA_RANGE_TYPE_MAX
};

/**
 * struct hl_va_range - virtual addresses range.
 * @lock: protects the virtual addresses list.
 * @list: list of virtual addresses blocks available for mappings.
 * @start_addr: range start address.
 * @end_addr: range end address.
 * @page_size: page size of this va range.
 */
struct hl_va_range {
        struct mutex            lock;
        struct list_head        list;
        u64                     start_addr;
        u64                     end_addr;
        u32                     page_size;
};

/**
 * struct hl_cs_counters_atomic - command submission counters
 * @out_of_mem_drop_cnt: dropped due to memory allocation issue
 * @parsing_drop_cnt: dropped due to error in packet parsing
 * @queue_full_drop_cnt: dropped due to queue full
 * @device_in_reset_drop_cnt: dropped due to device in reset
 * @max_cs_in_flight_drop_cnt: dropped due to maximum CS in-flight
 * @validation_drop_cnt: dropped due to error in validation
 */
struct hl_cs_counters_atomic {
        atomic64_t out_of_mem_drop_cnt;
        atomic64_t parsing_drop_cnt;
        atomic64_t queue_full_drop_cnt;
        atomic64_t device_in_reset_drop_cnt;
        atomic64_t max_cs_in_flight_drop_cnt;
        atomic64_t validation_drop_cnt;
};

/**
 * struct hl_ctx - user/kernel context.
 * @mem_hash: holds mapping from virtual address to virtual memory area
 *              descriptor (hl_vm_phys_pg_list or hl_userptr).
 * @mmu_shadow_hash: holds a mapping from shadow address to pgt_info structure.
 * @hpriv: pointer to the private (Kernel Driver) data of the process (fd).
 * @hdev: pointer to the device structure.
 * @refcount: reference counter for the context. Context is released only when
 *              this hits 0l. It is incremented on CS and CS_WAIT.
 * @cs_pending: array of hl fence objects representing pending CS.
 * @va_range: holds available virtual addresses for host and dram mappings.
 * @mem_hash_lock: protects the mem_hash.
 * @mmu_lock: protects the MMU page tables. Any change to the PGT, modifying the
 *            MMU hash or walking the PGT requires talking this lock.
 * @debugfs_list: node in debugfs list of contexts.
 * @cs_counters: context command submission counters.
 * @cb_va_pool: device VA pool for command buffers which are mapped to the
 *              device's MMU.
 * @cs_sequence: sequence number for CS. Value is assigned to a CS and passed
 *                      to user so user could inquire about CS. It is used as
 *                      index to cs_pending array.
 * @dram_default_hops: array that holds all hops addresses needed for default
 *                     DRAM mapping.
 * @cs_lock: spinlock to protect cs_sequence.
 * @dram_phys_mem: amount of used physical DRAM memory by this context.
 * @thread_ctx_switch_token: token to prevent multiple threads of the same
 *                              context from running the context switch phase.
 *                              Only a single thread should run it.
 * @thread_ctx_switch_wait_token: token to prevent the threads that didn't run
 *                              the context switch phase from moving to their
 *                              execution phase before the context switch phase
 *                              has finished.
 * @asid: context's unique address space ID in the device's MMU.
 * @handle: context's opaque handle for user
 */
struct hl_ctx {
        DECLARE_HASHTABLE(mem_hash, MEM_HASH_TABLE_BITS);
        DECLARE_HASHTABLE(mmu_shadow_hash, MMU_HASH_TABLE_BITS);
        struct hl_fpriv                 *hpriv;
        struct hl_device                *hdev;
        struct kref                     refcount;
        struct hl_fence                 **cs_pending;
        struct hl_va_range              *va_range[HL_VA_RANGE_TYPE_MAX];
        struct mutex                    mem_hash_lock;
        struct mutex                    mmu_lock;
        struct list_head                debugfs_list;
        struct hl_cs_counters_atomic    cs_counters;
        struct gen_pool                 *cb_va_pool;
        u64                             cs_sequence;
        u64                             *dram_default_hops;
        spinlock_t                      cs_lock;
        atomic64_t                      dram_phys_mem;
        atomic_t                        thread_ctx_switch_token;
        u32                             thread_ctx_switch_wait_token;
        u32                             asid;
        u32                             handle;
};

/**
 * struct hl_ctx_mgr - for handling multiple contexts.
 * @ctx_lock: protects ctx_handles.
 * @ctx_handles: idr to hold all ctx handles.
 */
struct hl_ctx_mgr {
        struct mutex            ctx_lock;
        struct idr              ctx_handles;
};



/*
 * COMMAND SUBMISSIONS
 */

/**
 * struct hl_userptr - memory mapping chunk information
 * @vm_type: type of the VM.
 * @job_node: linked-list node for hanging the object on the Job's list.
 * @vec: pointer to the frame vector.
 * @sgt: pointer to the scatter-gather table that holds the pages.
 * @dir: for DMA unmapping, the direction must be supplied, so save it.
 * @debugfs_list: node in debugfs list of command submissions.
 * @addr: user-space virtual address of the start of the memory area.
 * @size: size of the memory area to pin & map.
 * @dma_mapped: true if the SG was mapped to DMA addresses, false otherwise.
 */
struct hl_userptr {
        enum vm_type_t          vm_type; /* must be first */
        struct list_head        job_node;
        struct frame_vector     *vec;
        struct sg_table         *sgt;
        enum dma_data_direction dir;
        struct list_head        debugfs_list;
        u64                     addr;
        u32                     size;
        u8                      dma_mapped;
};

/**
 * struct hl_cs - command submission.
 * @jobs_in_queue_cnt: per each queue, maintain counter of submitted jobs.
 * @ctx: the context this CS belongs to.
 * @job_list: list of the CS's jobs in the various queues.
 * @job_lock: spinlock for the CS's jobs list. Needed for free_job.
 * @refcount: reference counter for usage of the CS.
 * @fence: pointer to the fence object of this CS.
 * @signal_fence: pointer to the fence object of the signal CS (used by wait
 *                CS only).
 * @finish_work: workqueue object to run when CS is completed by H/W.
 * @work_tdr: delayed work node for TDR.
 * @mirror_node : node in device mirror list of command submissions.
 * @debugfs_list: node in debugfs list of command submissions.
 * @sequence: the sequence number of this CS.
 * @type: CS_TYPE_*.
 * @submitted: true if CS was submitted to H/W.
 * @completed: true if CS was completed by device.
 * @timedout : true if CS was timedout.
 * @tdr_active: true if TDR was activated for this CS (to prevent
 *              double TDR activation).
 * @aborted: true if CS was aborted due to some device error.
 * @timestamp: true if a timestmap must be captured upon completion
 */
struct hl_cs {
        u16                     *jobs_in_queue_cnt;
        struct hl_ctx           *ctx;
        struct list_head        job_list;
        spinlock_t              job_lock;
        struct kref             refcount;
        struct hl_fence         *fence;
        struct hl_fence         *signal_fence;
        struct work_struct      finish_work;
        struct delayed_work     work_tdr;
        struct list_head        mirror_node;
        struct list_head        debugfs_list;
        u64                     sequence;
        enum hl_cs_type         type;
        u8                      submitted;
        u8                      completed;
        u8                      timedout;
        u8                      tdr_active;
        u8                      aborted;
        u8                      timestamp;
};

/**
 * struct hl_cs_job - command submission job.
 * @cs_node: the node to hang on the CS jobs list.
 * @cs: the CS this job belongs to.
 * @user_cb: the CB we got from the user.
 * @patched_cb: in case of patching, this is internal CB which is submitted on
 *              the queue instead of the CB we got from the IOCTL.
 * @finish_work: workqueue object to run when job is completed.
 * @userptr_list: linked-list of userptr mappings that belong to this job and
 *                      wait for completion.
 * @debugfs_list: node in debugfs list of command submission jobs.
 * @refcount: reference counter for usage of the CS job.
 * @queue_type: the type of the H/W queue this job is submitted to.
 * @id: the id of this job inside a CS.
 * @hw_queue_id: the id of the H/W queue this job is submitted to.
 * @user_cb_size: the actual size of the CB we got from the user.
 * @job_cb_size: the actual size of the CB that we put on the queue.
 * @is_kernel_allocated_cb: true if the CB handle we got from the user holds a
 *                          handle to a kernel-allocated CB object, false
 *                          otherwise (SRAM/DRAM/host address).
 * @contains_dma_pkt: whether the JOB contains at least one DMA packet. This
 *                    info is needed later, when adding the 2xMSG_PROT at the
 *                    end of the JOB, to know which barriers to put in the
 *                    MSG_PROT packets. Relevant only for GAUDI as GOYA doesn't
 *                    have streams so the engine can't be busy by another
 *                    stream.
 */
struct hl_cs_job {
        struct list_head        cs_node;
        struct hl_cs            *cs;
        struct hl_cb            *user_cb;
        struct hl_cb            *patched_cb;
        struct work_struct      finish_work;
        struct list_head        userptr_list;
        struct list_head        debugfs_list;
        struct kref             refcount;
        enum hl_queue_type      queue_type;
        u32                     id;
        u32                     hw_queue_id;
        u32                     user_cb_size;
        u32                     job_cb_size;
        u8                      is_kernel_allocated_cb;
        u8                      contains_dma_pkt;
};

/**
 * struct hl_cs_parser - command submission parser properties.
 * @user_cb: the CB we got from the user.
 * @patched_cb: in case of patching, this is internal CB which is submitted on
 *              the queue instead of the CB we got from the IOCTL.
 * @job_userptr_list: linked-list of userptr mappings that belong to the related
 *                      job and wait for completion.
 * @cs_sequence: the sequence number of the related CS.
 * @queue_type: the type of the H/W queue this job is submitted to.
 * @ctx_id: the ID of the context the related CS belongs to.
 * @hw_queue_id: the id of the H/W queue this job is submitted to.
 * @user_cb_size: the actual size of the CB we got from the user.
 * @patched_cb_size: the size of the CB after parsing.
 * @job_id: the id of the related job inside the related CS.
 * @is_kernel_allocated_cb: true if the CB handle we got from the user holds a
 *                          handle to a kernel-allocated CB object, false
 *                          otherwise (SRAM/DRAM/host address).
 * @contains_dma_pkt: whether the JOB contains at least one DMA packet. This
 *                    info is needed later, when adding the 2xMSG_PROT at the
 *                    end of the JOB, to know which barriers to put in the
 *                    MSG_PROT packets. Relevant only for GAUDI as GOYA doesn't
 *                    have streams so the engine can't be busy by another
 *                    stream.
 */
struct hl_cs_parser {
        struct hl_cb            *user_cb;
        struct hl_cb            *patched_cb;
        struct list_head        *job_userptr_list;
        u64                     cs_sequence;
        enum hl_queue_type      queue_type;
        u32                     ctx_id;
        u32                     hw_queue_id;
        u32                     user_cb_size;
        u32                     patched_cb_size;
        u8                      job_id;
        u8                      is_kernel_allocated_cb;
        u8                      contains_dma_pkt;
};

/*
 * MEMORY STRUCTURE
 */

/**
 * struct hl_vm_hash_node - hash element from virtual address to virtual
 *                              memory area descriptor (hl_vm_phys_pg_list or
 *                              hl_userptr).
 * @node: node to hang on the hash table in context object.
 * @vaddr: key virtual address.
 * @ptr: value pointer (hl_vm_phys_pg_list or hl_userptr).
 */
struct hl_vm_hash_node {
        struct hlist_node       node;
        u64                     vaddr;
        void                    *ptr;
};

/**
 * struct hl_vm_phys_pg_pack - physical page pack.
 * @vm_type: describes the type of the virtual area descriptor.
 * @pages: the physical page array.
 * @npages: num physical pages in the pack.
 * @total_size: total size of all the pages in this list.
 * @mapping_cnt: number of shared mappings.
 * @asid: the context related to this list.
 * @page_size: size of each page in the pack.
 * @flags: HL_MEM_* flags related to this list.
 * @handle: the provided handle related to this list.
 * @offset: offset from the first page.
 * @contiguous: is contiguous physical memory.
 * @created_from_userptr: is product of host virtual address.
 */
struct hl_vm_phys_pg_pack {
        enum vm_type_t          vm_type; /* must be first */
        u64                     *pages;
        u64                     npages;
        u64                     total_size;
        atomic_t                mapping_cnt;
        u32                     asid;
        u32                     page_size;
        u32                     flags;
        u32                     handle;
        u32                     offset;
        u8                      contiguous;
        u8                      created_from_userptr;
};

/**
 * struct hl_vm_va_block - virtual range block information.
 * @node: node to hang on the virtual range list in context object.
 * @start: virtual range start address.
 * @end: virtual range end address.
 * @size: virtual range size.
 */
struct hl_vm_va_block {
        struct list_head        node;
        u64                     start;
        u64                     end;
        u64                     size;
};

/**
 * struct hl_vm - virtual memory manager for MMU.
 * @dram_pg_pool: pool for DRAM physical pages of 2MB.
 * @dram_pg_pool_refcount: reference counter for the pool usage.
 * @idr_lock: protects the phys_pg_list_handles.
 * @phys_pg_pack_handles: idr to hold all device allocations handles.
 * @init_done: whether initialization was done. We need this because VM
 *              initialization might be skipped during device initialization.
 */
struct hl_vm {
        struct gen_pool         *dram_pg_pool;
        struct kref             dram_pg_pool_refcount;
        spinlock_t              idr_lock;
        struct idr              phys_pg_pack_handles;
        u8                      init_done;
};


/*
 * DEBUG, PROFILING STRUCTURE
 */

/**
 * struct hl_debug_params - Coresight debug parameters.
 * @input: pointer to component specific input parameters.
 * @output: pointer to component specific output parameters.
 * @output_size: size of output buffer.
 * @reg_idx: relevant register ID.
 * @op: component operation to execute.
 * @enable: true if to enable component debugging, false otherwise.
 */
struct hl_debug_params {
        void *input;
        void *output;
        u32 output_size;
        u32 reg_idx;
        u32 op;
        bool enable;
};

/*
 * FILE PRIVATE STRUCTURE
 */

/**
 * struct hl_fpriv - process information stored in FD private data.
 * @hdev: habanalabs device structure.
 * @filp: pointer to the given file structure.
 * @taskpid: current process ID.
 * @ctx: current executing context. TODO: remove for multiple ctx per process
 * @ctx_mgr: context manager to handle multiple context for this FD.
 * @cb_mgr: command buffer manager to handle multiple buffers for this FD.
 * @debugfs_list: list of relevant ASIC debugfs.
 * @dev_node: node in the device list of file private data
 * @refcount: number of related contexts.
 * @restore_phase_mutex: lock for context switch and restore phase.
 * @is_control: true for control device, false otherwise
 */
struct hl_fpriv {
        struct hl_device        *hdev;
        struct file             *filp;
        struct pid              *taskpid;
        struct hl_ctx           *ctx;
        struct hl_ctx_mgr       ctx_mgr;
        struct hl_cb_mgr        cb_mgr;
        struct list_head        debugfs_list;
        struct list_head        dev_node;
        struct kref             refcount;
        struct mutex            restore_phase_mutex;
        u8                      is_control;
};


/*
 * DebugFS
 */

/**
 * struct hl_info_list - debugfs file ops.
 * @name: file name.
 * @show: function to output information.
 * @write: function to write to the file.
 */
struct hl_info_list {
        const char      *name;
        int             (*show)(struct seq_file *s, void *data);
        ssize_t         (*write)(struct file *file, const char __user *buf,
                                size_t count, loff_t *f_pos);
};

/**
 * struct hl_debugfs_entry - debugfs dentry wrapper.
 * @dent: base debugfs entry structure.
 * @info_ent: dentry realted ops.
 * @dev_entry: ASIC specific debugfs manager.
 */
struct hl_debugfs_entry {
        struct dentry                   *dent;
        const struct hl_info_list       *info_ent;
        struct hl_dbg_device_entry      *dev_entry;
};

/**
 * struct hl_dbg_device_entry - ASIC specific debugfs manager.
 * @root: root dentry.
 * @hdev: habanalabs device structure.
 * @entry_arr: array of available hl_debugfs_entry.
 * @file_list: list of available debugfs files.
 * @file_mutex: protects file_list.
 * @cb_list: list of available CBs.
 * @cb_spinlock: protects cb_list.
 * @cs_list: list of available CSs.
 * @cs_spinlock: protects cs_list.
 * @cs_job_list: list of available CB jobs.
 * @cs_job_spinlock: protects cs_job_list.
 * @userptr_list: list of available userptrs (virtual memory chunk descriptor).
 * @userptr_spinlock: protects userptr_list.
 * @ctx_mem_hash_list: list of available contexts with MMU mappings.
 * @ctx_mem_hash_spinlock: protects cb_list.
 * @addr: next address to read/write from/to in read/write32.
 * @mmu_addr: next virtual address to translate to physical address in mmu_show.
 * @mmu_asid: ASID to use while translating in mmu_show.
 * @i2c_bus: generic u8 debugfs file for bus value to use in i2c_data_read.
 * @i2c_bus: generic u8 debugfs file for address value to use in i2c_data_read.
 * @i2c_bus: generic u8 debugfs file for register value to use in i2c_data_read.
 */
struct hl_dbg_device_entry {
        struct dentry                   *root;
        struct hl_device                *hdev;
        struct hl_debugfs_entry         *entry_arr;
        struct list_head                file_list;
        struct mutex                    file_mutex;
        struct list_head                cb_list;
        spinlock_t                      cb_spinlock;
        struct list_head                cs_list;
        spinlock_t                      cs_spinlock;
        struct list_head                cs_job_list;
        spinlock_t                      cs_job_spinlock;
        struct list_head                userptr_list;
        spinlock_t                      userptr_spinlock;
        struct list_head                ctx_mem_hash_list;
        spinlock_t                      ctx_mem_hash_spinlock;
        u64                             addr;
        u64                             mmu_addr;
        u32                             mmu_asid;
        u8                              i2c_bus;
        u8                              i2c_addr;
        u8                              i2c_reg;
};


/*
 * DEVICES
 */

#define HL_STR_MAX      32

#define HL_DEV_STS_MAX (HL_DEVICE_STATUS_NEEDS_RESET + 1)

/* Theoretical limit only. A single host can only contain up to 4 or 8 PCIe
 * x16 cards. In extreme cases, there are hosts that can accommodate 16 cards.
 */
#define HL_MAX_MINORS   256

/*
 * Registers read & write functions.
 */

u32 hl_rreg(struct hl_device *hdev, u32 reg);
void hl_wreg(struct hl_device *hdev, u32 reg, u32 val);

#define RREG32(reg) hdev->asic_funcs->rreg(hdev, (reg))
#define WREG32(reg, v) hdev->asic_funcs->wreg(hdev, (reg), (v))
#define DREG32(reg) pr_info("REGISTER: " #reg " : 0x%08X\n",    \
                        hdev->asic_funcs->rreg(hdev, (reg)))

#define WREG32_P(reg, val, mask)                                \
        do {                                                    \
                u32 tmp_ = RREG32(reg);                         \
                tmp_ &= (mask);                                 \
                tmp_ |= ((val) & ~(mask));                      \
                WREG32(reg, tmp_);                              \
        } while (0)
#define WREG32_AND(reg, and) WREG32_P(reg, 0, and)
#define WREG32_OR(reg, or) WREG32_P(reg, or, ~(or))

#define RMWREG32(reg, val, mask)                                \
        do {                                                    \
                u32 tmp_ = RREG32(reg);                         \
                tmp_ &= ~(mask);                                \
                tmp_ |= ((val) << __ffs(mask));                 \
                WREG32(reg, tmp_);                              \
        } while (0)

#define RREG32_MASK(reg, mask) ((RREG32(reg) & mask) >> __ffs(mask))

#define REG_FIELD_SHIFT(reg, field) reg##_##field##_SHIFT
#define REG_FIELD_MASK(reg, field) reg##_##field##_MASK
#define WREG32_FIELD(reg, offset, field, val)   \
        WREG32(mm##reg + offset, (RREG32(mm##reg + offset) & \
                                ~REG_FIELD_MASK(reg, field)) | \
                                (val) << REG_FIELD_SHIFT(reg, field))

/* Timeout should be longer when working with simulator but cap the
 * increased timeout to some maximum
 */
#define hl_poll_timeout(hdev, addr, val, cond, sleep_us, timeout_us) \
({ \
        ktime_t __timeout; \
        if (hdev->pdev) \
                __timeout = ktime_add_us(ktime_get(), timeout_us); \
        else \
                __timeout = ktime_add_us(ktime_get(),\
                                min((u64)(timeout_us * 10), \
                                        (u64) HL_SIM_MAX_TIMEOUT_US)); \
        might_sleep_if(sleep_us); \
        for (;;) { \
                (val) = RREG32(addr); \
                if (cond) \
                        break; \
                if (timeout_us && ktime_compare(ktime_get(), __timeout) > 0) { \
                        (val) = RREG32(addr); \
                        break; \
                } \
                if (sleep_us) \
                        usleep_range((sleep_us >> 2) + 1, sleep_us); \
        } \
        (cond) ? 0 : -ETIMEDOUT; \
})

/*
 * address in this macro points always to a memory location in the
 * host's (server's) memory. That location is updated asynchronously
 * either by the direct access of the device or by another core.
 *
 * To work both in LE and BE architectures, we need to distinguish between the
 * two states (device or another core updates the memory location). Therefore,
 * if mem_written_by_device is true, the host memory being polled will be
 * updated directly by the device. If false, the host memory being polled will
 * be updated by host CPU. Required so host knows whether or not the memory
 * might need to be byte-swapped before returning value to caller.
 */
#define hl_poll_timeout_memory(hdev, addr, val, cond, sleep_us, timeout_us, \
                                mem_written_by_device) \
({ \
        ktime_t __timeout; \
        if (hdev->pdev) \
                __timeout = ktime_add_us(ktime_get(), timeout_us); \
        else \
                __timeout = ktime_add_us(ktime_get(),\
                                min((u64)(timeout_us * 10), \
                                        (u64) HL_SIM_MAX_TIMEOUT_US)); \
        might_sleep_if(sleep_us); \
        for (;;) { \
                /* Verify we read updates done by other cores or by device */ \
                mb(); \
                (val) = *((u32 *)(addr)); \
                if (mem_written_by_device) \
                        (val) = le32_to_cpu(*(__le32 *) &(val)); \
                if (cond) \
                        break; \
                if (timeout_us && ktime_compare(ktime_get(), __timeout) > 0) { \
                        (val) = *((u32 *)(addr)); \
                        if (mem_written_by_device) \
                                (val) = le32_to_cpu(*(__le32 *) &(val)); \
                        break; \
                } \
                if (sleep_us) \
                        usleep_range((sleep_us >> 2) + 1, sleep_us); \
        } \
        (cond) ? 0 : -ETIMEDOUT; \
})

#define hl_poll_timeout_device_memory(hdev, addr, val, cond, sleep_us, \
                                        timeout_us) \
({ \
        ktime_t __timeout; \
        if (hdev->pdev) \
                __timeout = ktime_add_us(ktime_get(), timeout_us); \
        else \
                __timeout = ktime_add_us(ktime_get(),\
                                min((u64)(timeout_us * 10), \
                                        (u64) HL_SIM_MAX_TIMEOUT_US)); \
        might_sleep_if(sleep_us); \
        for (;;) { \
                (val) = readl(addr); \
                if (cond) \
                        break; \
                if (timeout_us && ktime_compare(ktime_get(), __timeout) > 0) { \
                        (val) = readl(addr); \
                        break; \
                } \
                if (sleep_us) \
                        usleep_range((sleep_us >> 2) + 1, sleep_us); \
        } \
        (cond) ? 0 : -ETIMEDOUT; \
})

struct hwmon_chip_info;

/**
 * struct hl_device_reset_work - reset workqueue task wrapper.
 * @wq: work queue for device reset procedure.
 * @reset_work: reset work to be done.
 * @hdev: habanalabs device structure.
 */
struct hl_device_reset_work {
        struct workqueue_struct         *wq;
        struct delayed_work             reset_work;
        struct hl_device                *hdev;
};

/**
 * struct hl_device_idle_busy_ts - used for calculating device utilization rate.
 * @idle_to_busy_ts: timestamp where device changed from idle to busy.
 * @busy_to_idle_ts: timestamp where device changed from busy to idle.
 */
struct hl_device_idle_busy_ts {
        ktime_t                         idle_to_busy_ts;
        ktime_t                         busy_to_idle_ts;
};

/**
 * struct hr_mmu_hop_addrs - used for holding per-device host-resident mmu hop
 * information.
 * @virt_addr: the virtual address of the hop.
 * @phys-addr: the physical address of the hop (used by the device-mmu).
 * @shadow_addr: The shadow of the hop used by the driver for walking the hops.
 */
struct hr_mmu_hop_addrs {
        u64 virt_addr;
        u64 phys_addr;
        u64 shadow_addr;
};

/**
 * struct hl_mmu_hr_pgt_priv - used for holding per-device mmu host-resident
 * page-table internal information.
 * @mmu_pgt_pool: pool of page tables used by MMU for allocating hops.
 * @mmu_shadow_hop0: shadow array of hop0 tables.
 */
struct hl_mmu_hr_priv {
        struct gen_pool *mmu_pgt_pool;
        struct hr_mmu_hop_addrs *mmu_shadow_hop0;
};

/**
 * struct hl_mmu_dr_pgt_priv - used for holding per-device mmu device-resident
 * page-table internal information.
 * @mmu_pgt_pool: pool of page tables used by MMU for allocating hops.
 * @mmu_shadow_hop0: shadow array of hop0 tables.
 */
struct hl_mmu_dr_priv {
        struct gen_pool *mmu_pgt_pool;
        void *mmu_shadow_hop0;
};

/**
 * struct hl_mmu_priv - used for holding per-device mmu internal information.
 * @dr: information on the device-resident MMU, when exists.
 * @hr: information on the host-resident MMU, when exists.
 */
struct hl_mmu_priv {
        struct hl_mmu_dr_priv dr;
        struct hl_mmu_hr_priv hr;
};

/**
 * struct hl_mmu_per_hop_info - A structure describing one TLB HOP and its entry
 *                that was created in order to translate a virtual address to a
 *                physical one.
 * @hop_addr: The address of the hop.
 * @hop_pte_addr: The address of the hop entry.
 * @hop_pte_val: The value in the hop entry.
 */
struct hl_mmu_per_hop_info {
        u64 hop_addr;
        u64 hop_pte_addr;
        u64 hop_pte_val;
};

/**
 * struct hl_mmu_hop_info - A structure describing the TLB hops and their
 * hop-entries that were created in order to translate a virtual address to a
 * physical one.
 * @hop_info: Array holding the per-hop information used for the translation.
 * @used_hops: The number of hops used for the translation.
 */
struct hl_mmu_hop_info {
        struct hl_mmu_per_hop_info hop_info[MMU_ARCH_5_HOPS];
        u32 used_hops;
};

/**
 * struct hl_mmu_funcs - Device related MMU functions.
 * @init: initialize the MMU module.
 * @fini: release the MMU module.
 * @ctx_init: Initialize a context for using the MMU module.
 * @ctx_fini: disable a ctx from using the mmu module.
 * @map: maps a virtual address to physical address for a context.
 * @unmap: unmap a virtual address of a context.
 * @flush: flush all writes from all cores to reach device MMU.
 * @swap_out: marks all mapping of the given context as swapped out.
 * @swap_in: marks all mapping of the given context as swapped in.
 * @get_tlb_info: returns the list of hops and hop-entries used that were
 *                created in order to translate the giver virtual address to a
 *                physical one.
 */
struct hl_mmu_funcs {
        int (*init)(struct hl_device *hdev);
        void (*fini)(struct hl_device *hdev);
        int (*ctx_init)(struct hl_ctx *ctx);
        void (*ctx_fini)(struct hl_ctx *ctx);
        int (*map)(struct hl_ctx *ctx,
                        u64 virt_addr, u64 phys_addr, u32 page_size,
                        bool is_dram_addr);
        int (*unmap)(struct hl_ctx *ctx,
                        u64 virt_addr, bool is_dram_addr);
        void (*flush)(struct hl_ctx *ctx);
        void (*swap_out)(struct hl_ctx *ctx);
        void (*swap_in)(struct hl_ctx *ctx);
        int (*get_tlb_info)(struct hl_ctx *ctx,
                        u64 virt_addr, struct hl_mmu_hop_info *hops);
};

/**
 * struct hl_device - habanalabs device structure.
 * @pdev: pointer to PCI device, can be NULL in case of simulator device.
 * @pcie_bar_phys: array of available PCIe bars physical addresses.
 *                 (required only for PCI address match mode)
 * @pcie_bar: array of available PCIe bars virtual addresses.
 * @rmmio: configuration area address on SRAM.
 * @cdev: related char device.
 * @cdev_ctrl: char device for control operations only (INFO IOCTL)
 * @dev: related kernel basic device structure.
 * @dev_ctrl: related kernel device structure for the control device
 * @work_freq: delayed work to lower device frequency if possible.
 * @work_heartbeat: delayed work for CPU-CP is-alive check.
 * @device_reset_work: delayed work which performs hard reset
 * @asic_name: ASIC specific name.
 * @asic_type: ASIC specific type.
 * @completion_queue: array of hl_cq.
 * @cq_wq: work queues of completion queues for executing work in process
 *         context.
 * @eq_wq: work queue of event queue for executing work in process context.
 * @kernel_ctx: Kernel driver context structure.
 * @kernel_queues: array of hl_hw_queue.
 * @cs_mirror_list: CS mirror list for TDR.
 * @cs_mirror_lock: protects cs_mirror_list.
 * @kernel_cb_mgr: command buffer manager for creating/destroying/handling CGs.
 * @event_queue: event queue for IRQ from CPU-CP.
 * @dma_pool: DMA pool for small allocations.
 * @cpu_accessible_dma_mem: Host <-> CPU-CP shared memory CPU address.
 * @cpu_accessible_dma_address: Host <-> CPU-CP shared memory DMA address.
 * @cpu_accessible_dma_pool: Host <-> CPU-CP shared memory pool.
 * @asid_bitmap: holds used/available ASIDs.
 * @asid_mutex: protects asid_bitmap.
 * @send_cpu_message_lock: enforces only one message in Host <-> CPU-CP queue.
 * @debug_lock: protects critical section of setting debug mode for device
 * @asic_prop: ASIC specific immutable properties.
 * @asic_funcs: ASIC specific functions.
 * @asic_specific: ASIC specific information to use only from ASIC files.
 * @vm: virtual memory manager for MMU.
 * @mmu_cache_lock: protects MMU cache invalidation as it can serve one context.
 * @hwmon_dev: H/W monitor device.
 * @pm_mng_profile: current power management profile.
 * @hl_chip_info: ASIC's sensors information.
 * @device_status_description: device status description.
 * @hl_debugfs: device's debugfs manager.
 * @cb_pool: list of preallocated CBs.
 * @cb_pool_lock: protects the CB pool.
 * @internal_cb_pool_virt_addr: internal command buffer pool virtual address.
 * @internal_cb_pool_dma_addr: internal command buffer pool dma address.
 * @internal_cb_pool: internal command buffer memory pool.
 * @internal_cb_va_base: internal cb pool mmu virtual address base
 * @fpriv_list: list of file private data structures. Each structure is created
 *              when a user opens the device
 * @fpriv_list_lock: protects the fpriv_list
 * @compute_ctx: current compute context executing.
 * @idle_busy_ts_arr: array to hold time stamps of transitions from idle to busy
 *                    and vice-versa
 * @aggregated_cs_counters: aggregated cs counters among all contexts
 * @mmu_priv: device-specific MMU data.
 * @mmu_func: device-related MMU functions.
 * @dram_used_mem: current DRAM memory consumption.
 * @timeout_jiffies: device CS timeout value.
 * @max_power: the max power of the device, as configured by the sysadmin. This
 *             value is saved so in case of hard-reset, the driver will restore
 *             this value and update the F/W after the re-initialization
 * @clock_gating_mask: is clock gating enabled. bitmask that represents the
 *                     different engines. See debugfs-driver-habanalabs for
 *                     details.
 * @in_reset: is device in reset flow.
 * @curr_pll_profile: current PLL profile.
 * @card_type: Various ASICs have several card types. This indicates the card
 *             type of the current device.
 * @cs_active_cnt: number of active command submissions on this device (active
 *                 means already in H/W queues)
 * @major: habanalabs kernel driver major.
 * @high_pll: high PLL profile frequency.
 * @soft_reset_cnt: number of soft reset since the driver was loaded.
 * @hard_reset_cnt: number of hard reset since the driver was loaded.
 * @idle_busy_ts_idx: index of current entry in idle_busy_ts_arr
 * @clk_throttling_reason: bitmask represents the current clk throttling reasons
 * @id: device minor.
 * @id_control: minor of the control device
 * @cpu_pci_msb_addr: 50-bit extension bits for the device CPU's 40-bit
 *                    addresses.
 * @disabled: is device disabled.
 * @late_init_done: is late init stage was done during initialization.
 * @hwmon_initialized: is H/W monitor sensors was initialized.
 * @hard_reset_pending: is there a hard reset work pending.
 * @heartbeat: is heartbeat sanity check towards CPU-CP enabled.
 * @reset_on_lockup: true if a reset should be done in case of stuck CS, false
 *                   otherwise.
 * @dram_default_page_mapping: is DRAM default page mapping enabled.
 * @memory_scrub: true to perform device memory scrub in various locations,
 *                such as context-switch, context close, page free, etc.
 * @pmmu_huge_range: is a different virtual addresses range used for PMMU with
 *                   huge pages.
 * @init_done: is the initialization of the device done.
 * @device_cpu_disabled: is the device CPU disabled (due to timeouts)
 * @dma_mask: the dma mask that was set for this device
 * @in_debug: is device under debug. This, together with fpriv_list, enforces
 *            that only a single user is configuring the debug infrastructure.
 * @power9_64bit_dma_enable: true to enable 64-bit DMA mask support. Relevant
 *                           only to POWER9 machines.
 * @cdev_sysfs_created: were char devices and sysfs nodes created.
 * @stop_on_err: true if engines should stop on error.
 * @supports_sync_stream: is sync stream supported.
 * @sync_stream_queue_idx: helper index for sync stream queues initialization.
 * @collective_mon_idx: helper index for collective initialization
 * @supports_coresight: is CoreSight supported.
 * @supports_soft_reset: is soft reset supported.
 * @supports_cb_mapping: is mapping a CB to the device's MMU supported.
 * @needs_reset: true if reset_on_lockup is false and device should be reset
 *               due to lockup.
 * @process_kill_trial_cnt: number of trials reset thread tried killing
 *                          user processes
 * @device_fini_pending: true if device_fini was called and might be
 *                       waiting for the reset thread to finish
 */
struct hl_device {
        struct pci_dev                  *pdev;
        u64                             pcie_bar_phys[HL_PCI_NUM_BARS];
        void __iomem                    *pcie_bar[HL_PCI_NUM_BARS];
        void __iomem                    *rmmio;
        struct cdev                     cdev;
        struct cdev                     cdev_ctrl;
        struct device                   *dev;
        struct device                   *dev_ctrl;
        struct delayed_work             work_freq;
        struct delayed_work             work_heartbeat;
        struct hl_device_reset_work     device_reset_work;
        char                            asic_name[HL_STR_MAX];
        char                            status[HL_DEV_STS_MAX][HL_STR_MAX];
        enum hl_asic_type               asic_type;
        struct hl_cq                    *completion_queue;
        struct workqueue_struct         **cq_wq;
        struct workqueue_struct         *eq_wq;
        struct hl_ctx                   *kernel_ctx;
        struct hl_hw_queue              *kernel_queues;
        struct list_head                cs_mirror_list;
        spinlock_t                      cs_mirror_lock;
        struct hl_cb_mgr                kernel_cb_mgr;
        struct hl_eq                    event_queue;
        struct dma_pool                 *dma_pool;
        void                            *cpu_accessible_dma_mem;
        dma_addr_t                      cpu_accessible_dma_address;
        struct gen_pool                 *cpu_accessible_dma_pool;
        unsigned long                   *asid_bitmap;
        struct mutex                    asid_mutex;
        struct mutex                    send_cpu_message_lock;
        struct mutex                    debug_lock;
        struct asic_fixed_properties    asic_prop;
        const struct hl_asic_funcs      *asic_funcs;
        void                            *asic_specific;
        struct hl_vm                    vm;
        struct mutex                    mmu_cache_lock;
        struct device                   *hwmon_dev;
        enum hl_pm_mng_profile          pm_mng_profile;
        struct hwmon_chip_info          *hl_chip_info;

        struct hl_dbg_device_entry      hl_debugfs;

        struct list_head                cb_pool;
        spinlock_t                      cb_pool_lock;

        void                            *internal_cb_pool_virt_addr;
        dma_addr_t                      internal_cb_pool_dma_addr;
        struct gen_pool                 *internal_cb_pool;
        u64                             internal_cb_va_base;

        struct list_head                fpriv_list;
        struct mutex                    fpriv_list_lock;

        struct hl_ctx                   *compute_ctx;

        struct hl_device_idle_busy_ts   *idle_busy_ts_arr;

        struct hl_cs_counters_atomic    aggregated_cs_counters;

        struct hl_mmu_priv              mmu_priv;
        struct hl_mmu_funcs             mmu_func[MMU_NUM_PGT_LOCATIONS];

        atomic64_t                      dram_used_mem;
        u64                             timeout_jiffies;
        u64                             max_power;
        u64                             clock_gating_mask;
        atomic_t                        in_reset;
        enum hl_pll_frequency           curr_pll_profile;
        enum cpucp_card_types           card_type;
        int                             cs_active_cnt;
        u32                             major;
        u32                             high_pll;
        u32                             soft_reset_cnt;
        u32                             hard_reset_cnt;
        u32                             idle_busy_ts_idx;
        u32                             clk_throttling_reason;
        u16                             id;
        u16                             id_control;
        u16                             cpu_pci_msb_addr;
        u8                              disabled;
        u8                              late_init_done;
        u8                              hwmon_initialized;
        u8                              hard_reset_pending;
        u8                              heartbeat;
        u8                              reset_on_lockup;
        u8                              dram_default_page_mapping;
        u8                              memory_scrub;
        u8                              pmmu_huge_range;
        u8                              init_done;
        u8                              device_cpu_disabled;
        u8                              dma_mask;
        u8                              in_debug;
        u8                              power9_64bit_dma_enable;
        u8                              cdev_sysfs_created;
        u8                              stop_on_err;
        u8                              supports_sync_stream;
        u8                              sync_stream_queue_idx;
        u8                              collective_mon_idx;
        u8                              supports_coresight;
        u8                              supports_soft_reset;
        u8                              supports_cb_mapping;
        u8                              needs_reset;
        u8                              process_kill_trial_cnt;
        u8                              device_fini_pending;

        /* Parameters for bring-up */
        u64                             nic_ports_mask;
        u64                             fw_loading;
        u8                              mmu_enable;
        u8                              mmu_huge_page_opt;
        u8                              cpu_enable;
        u8                              reset_pcilink;
        u8                              cpu_queues_enable;
        u8                              pldm;
        u8                              axi_drain;
        u8                              sram_scrambler_enable;
        u8                              dram_scrambler_enable;
        u8                              hard_reset_on_fw_events;
        u8                              bmc_enable;
        u8                              rl_enable;
        u8                              reset_on_preboot_fail;
};


/*
 * IOCTLs
 */

/**
 * typedef hl_ioctl_t - typedef for ioctl function in the driver
 * @hpriv: pointer to the FD's private data, which contains state of
 *              user process
 * @data: pointer to the input/output arguments structure of the IOCTL
 *
 * Return: 0 for success, negative value for error
 */
typedef int hl_ioctl_t(struct hl_fpriv *hpriv, void *data);

/**
 * struct hl_ioctl_desc - describes an IOCTL entry of the driver.
 * @cmd: the IOCTL code as created by the kernel macros.
 * @func: pointer to the driver's function that should be called for this IOCTL.
 */
struct hl_ioctl_desc {
        unsigned int cmd;
        hl_ioctl_t *func;
};


/*
 * Kernel module functions that can be accessed by entire module
 */

/**
 * hl_mem_area_inside_range() - Checks whether address+size are inside a range.
 * @address: The start address of the area we want to validate.
 * @size: The size in bytes of the area we want to validate.
 * @range_start_address: The start address of the valid range.
 * @range_end_address: The end address of the valid range.
 *
 * Return: true if the area is inside the valid range, false otherwise.
 */
static inline bool hl_mem_area_inside_range(u64 address, u64 size,
                                u64 range_start_address, u64 range_end_address)
{
        u64 end_address = address + size;

        if ((address >= range_start_address) &&
                        (end_address <= range_end_address) &&
                        (end_address > address))
                return true;

        return false;
}

/**
 * hl_mem_area_crosses_range() - Checks whether address+size crossing a range.
 * @address: The start address of the area we want to validate.
 * @size: The size in bytes of the area we want to validate.
 * @range_start_address: The start address of the valid range.
 * @range_end_address: The end address of the valid range.
 *
 * Return: true if the area overlaps part or all of the valid range,
 *              false otherwise.
 */
static inline bool hl_mem_area_crosses_range(u64 address, u32 size,
                                u64 range_start_address, u64 range_end_address)
{
        u64 end_address = address + size;

        if ((address >= range_start_address) &&
                        (address < range_end_address))
                return true;

        if ((end_address >= range_start_address) &&
                        (end_address < range_end_address))
                return true;

        if ((address < range_start_address) &&
                        (end_address >= range_end_address))
                return true;

        return false;
}

int hl_device_open(struct inode *inode, struct file *filp);
int hl_device_open_ctrl(struct inode *inode, struct file *filp);
bool hl_device_operational(struct hl_device *hdev,
                enum hl_device_status *status);
enum hl_device_status hl_device_status(struct hl_device *hdev);
int hl_device_set_debug_mode(struct hl_device *hdev, bool enable);
int create_hdev(struct hl_device **dev, struct pci_dev *pdev,
                enum hl_asic_type asic_type, int minor);
void destroy_hdev(struct hl_device *hdev);
int hl_hw_queues_create(struct hl_device *hdev);
void hl_hw_queues_destroy(struct hl_device *hdev);
int hl_hw_queue_send_cb_no_cmpl(struct hl_device *hdev, u32 hw_queue_id,
                                u32 cb_size, u64 cb_ptr);
int hl_hw_queue_schedule_cs(struct hl_cs *cs);
u32 hl_hw_queue_add_ptr(u32 ptr, u16 val);
void hl_hw_queue_inc_ci_kernel(struct hl_device *hdev, u32 hw_queue_id);
void hl_int_hw_queue_update_ci(struct hl_cs *cs);
void hl_hw_queue_reset(struct hl_device *hdev, bool hard_reset);

#define hl_queue_inc_ptr(p)             hl_hw_queue_add_ptr(p, 1)
#define hl_pi_2_offset(pi)              ((pi) & (HL_QUEUE_LENGTH - 1))

int hl_cq_init(struct hl_device *hdev, struct hl_cq *q, u32 hw_queue_id);
void hl_cq_fini(struct hl_device *hdev, struct hl_cq *q);
int hl_eq_init(struct hl_device *hdev, struct hl_eq *q);
void hl_eq_fini(struct hl_device *hdev, struct hl_eq *q);
void hl_cq_reset(struct hl_device *hdev, struct hl_cq *q);
void hl_eq_reset(struct hl_device *hdev, struct hl_eq *q);
irqreturn_t hl_irq_handler_cq(int irq, void *arg);
irqreturn_t hl_irq_handler_eq(int irq, void *arg);
u32 hl_cq_inc_ptr(u32 ptr);

int hl_asid_init(struct hl_device *hdev);
void hl_asid_fini(struct hl_device *hdev);
unsigned long hl_asid_alloc(struct hl_device *hdev);
void hl_asid_free(struct hl_device *hdev, unsigned long asid);

int hl_ctx_create(struct hl_device *hdev, struct hl_fpriv *hpriv);
void hl_ctx_free(struct hl_device *hdev, struct hl_ctx *ctx);
int hl_ctx_init(struct hl_device *hdev, struct hl_ctx *ctx, bool is_kernel_ctx);
void hl_ctx_do_release(struct kref *ref);
void hl_ctx_get(struct hl_device *hdev, struct hl_ctx *ctx);
int hl_ctx_put(struct hl_ctx *ctx);
struct hl_fence *hl_ctx_get_fence(struct hl_ctx *ctx, u64 seq);
void hl_ctx_mgr_init(struct hl_ctx_mgr *mgr);
void hl_ctx_mgr_fini(struct hl_device *hdev, struct hl_ctx_mgr *mgr);

int hl_device_init(struct hl_device *hdev, struct class *hclass);
void hl_device_fini(struct hl_device *hdev);
int hl_device_suspend(struct hl_device *hdev);
int hl_device_resume(struct hl_device *hdev);
int hl_device_reset(struct hl_device *hdev, bool hard_reset,
                        bool from_hard_reset_thread);
void hl_hpriv_get(struct hl_fpriv *hpriv);
void hl_hpriv_put(struct hl_fpriv *hpriv);
int hl_device_set_frequency(struct hl_device *hdev, enum hl_pll_frequency freq);
uint32_t hl_device_utilization(struct hl_device *hdev, uint32_t period_ms);

int hl_build_hwmon_channel_info(struct hl_device *hdev,
                struct cpucp_sensor *sensors_arr);

int hl_sysfs_init(struct hl_device *hdev);
void hl_sysfs_fini(struct hl_device *hdev);

int hl_hwmon_init(struct hl_device *hdev);
void hl_hwmon_fini(struct hl_device *hdev);

int hl_cb_create(struct hl_device *hdev, struct hl_cb_mgr *mgr,
                        struct hl_ctx *ctx, u32 cb_size, bool internal_cb,
                        bool map_cb, u64 *handle);
int hl_cb_destroy(struct hl_device *hdev, struct hl_cb_mgr *mgr, u64 cb_handle);
int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma);
struct hl_cb *hl_cb_get(struct hl_device *hdev, struct hl_cb_mgr *mgr,
                        u32 handle);
void hl_cb_put(struct hl_cb *cb);
void hl_cb_mgr_init(struct hl_cb_mgr *mgr);
void hl_cb_mgr_fini(struct hl_device *hdev, struct hl_cb_mgr *mgr);
struct hl_cb *hl_cb_kernel_create(struct hl_device *hdev, u32 cb_size,
                                        bool internal_cb);
int hl_cb_pool_init(struct hl_device *hdev);
int hl_cb_pool_fini(struct hl_device *hdev);
int hl_cb_va_pool_init(struct hl_ctx *ctx);
void hl_cb_va_pool_fini(struct hl_ctx *ctx);

void hl_cs_rollback_all(struct hl_device *hdev);
struct hl_cs_job *hl_cs_allocate_job(struct hl_device *hdev,
                enum hl_queue_type queue_type, bool is_kernel_allocated_cb);
void hl_sob_reset_error(struct kref *ref);
int hl_gen_sob_mask(u16 sob_base, u8 sob_mask, u8 *mask);
void hl_fence_put(struct hl_fence *fence);
void hl_fence_get(struct hl_fence *fence);
void cs_get(struct hl_cs *cs);

void goya_set_asic_funcs(struct hl_device *hdev);
void gaudi_set_asic_funcs(struct hl_device *hdev);

int hl_vm_ctx_init(struct hl_ctx *ctx);
void hl_vm_ctx_fini(struct hl_ctx *ctx);

int hl_vm_init(struct hl_device *hdev);
void hl_vm_fini(struct hl_device *hdev);

u64 hl_reserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx,
                enum hl_va_range_type type, u32 size, u32 alignment);
int hl_unreserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx,
                u64 start_addr, u64 size);
int hl_pin_host_memory(struct hl_device *hdev, u64 addr, u64 size,
                        struct hl_userptr *userptr);
void hl_unpin_host_memory(struct hl_device *hdev, struct hl_userptr *userptr);
void hl_userptr_delete_list(struct hl_device *hdev,
                                struct list_head *userptr_list);
bool hl_userptr_is_pinned(struct hl_device *hdev, u64 addr, u32 size,
                                struct list_head *userptr_list,
                                struct hl_userptr **userptr);

int hl_mmu_init(struct hl_device *hdev);
void hl_mmu_fini(struct hl_device *hdev);
int hl_mmu_ctx_init(struct hl_ctx *ctx);
void hl_mmu_ctx_fini(struct hl_ctx *ctx);
int hl_mmu_map_page(struct hl_ctx *ctx, u64 virt_addr, u64 phys_addr,
                u32 page_size, bool flush_pte);
int hl_mmu_unmap_page(struct hl_ctx *ctx, u64 virt_addr, u32 page_size,
                bool flush_pte);
int hl_mmu_map_contiguous(struct hl_ctx *ctx, u64 virt_addr,
                                        u64 phys_addr, u32 size);
int hl_mmu_unmap_contiguous(struct hl_ctx *ctx, u64 virt_addr, u32 size);
void hl_mmu_swap_out(struct hl_ctx *ctx);
void hl_mmu_swap_in(struct hl_ctx *ctx);
int hl_mmu_if_set_funcs(struct hl_device *hdev);
void hl_mmu_v1_set_funcs(struct hl_device *hdev, struct hl_mmu_funcs *mmu);
int hl_mmu_va_to_pa(struct hl_ctx *ctx, u64 virt_addr, u64 *phys_addr);
int hl_mmu_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr,
                        struct hl_mmu_hop_info *hops);

int hl_fw_load_fw_to_device(struct hl_device *hdev, const char *fw_name,
                                void __iomem *dst, u32 src_offset, u32 size);
int hl_fw_send_pci_access_msg(struct hl_device *hdev, u32 opcode);
int hl_fw_send_cpu_message(struct hl_device *hdev, u32 hw_queue_id, u32 *msg,
                                u16 len, u32 timeout, u64 *result);
int hl_fw_unmask_irq(struct hl_device *hdev, u16 event_type);
int hl_fw_unmask_irq_arr(struct hl_device *hdev, const u32 *irq_arr,
                size_t irq_arr_size);
int hl_fw_test_cpu_queue(struct hl_device *hdev);
void *hl_fw_cpu_accessible_dma_pool_alloc(struct hl_device *hdev, size_t size,
                                                dma_addr_t *dma_handle);
void hl_fw_cpu_accessible_dma_pool_free(struct hl_device *hdev, size_t size,
                                        void *vaddr);
int hl_fw_send_heartbeat(struct hl_device *hdev);
int hl_fw_cpucp_info_get(struct hl_device *hdev,
                        u32 cpu_security_boot_status_reg);
int hl_fw_get_eeprom_data(struct hl_device *hdev, void *data, size_t max_size);
int hl_fw_cpucp_pci_counters_get(struct hl_device *hdev,
                struct hl_info_pci_counters *counters);
int hl_fw_cpucp_total_energy_get(struct hl_device *hdev,
                        u64 *total_energy);
int hl_fw_cpucp_pll_info_get(struct hl_device *hdev, u16 pll_index,
                u16 *pll_freq_arr);
int hl_fw_init_cpu(struct hl_device *hdev, u32 cpu_boot_status_reg,
                        u32 msg_to_cpu_reg, u32 cpu_msg_status_reg,
                        u32 cpu_security_boot_status_reg, u32 boot_err0_reg,
                        bool skip_bmc, u32 cpu_timeout, u32 boot_fit_timeout);
int hl_fw_read_preboot_status(struct hl_device *hdev, u32 cpu_boot_status_reg,
                u32 cpu_security_boot_status_reg, u32 boot_err0_reg,
                u32 timeout);

int hl_pci_bars_map(struct hl_device *hdev, const char * const name[3],
                        bool is_wc[3]);
int hl_pci_iatu_write(struct hl_device *hdev, u32 addr, u32 data);
int hl_pci_set_inbound_region(struct hl_device *hdev, u8 region,
                struct hl_inbound_pci_region *pci_region);
int hl_pci_set_outbound_region(struct hl_device *hdev,
                struct hl_outbound_pci_region *pci_region);
int hl_pci_init(struct hl_device *hdev);
void hl_pci_fini(struct hl_device *hdev);

long hl_get_frequency(struct hl_device *hdev, u32 pll_index, bool curr);
void hl_set_frequency(struct hl_device *hdev, u32 pll_index, u64 freq);
int hl_get_temperature(struct hl_device *hdev,
                       int sensor_index, u32 attr, long *value);
int hl_set_temperature(struct hl_device *hdev,
                       int sensor_index, u32 attr, long value);
int hl_get_voltage(struct hl_device *hdev,
                   int sensor_index, u32 attr, long *value);
int hl_get_current(struct hl_device *hdev,
                   int sensor_index, u32 attr, long *value);
int hl_get_fan_speed(struct hl_device *hdev,
                     int sensor_index, u32 attr, long *value);
int hl_get_pwm_info(struct hl_device *hdev,
                    int sensor_index, u32 attr, long *value);
void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
                        long value);
u64 hl_get_max_power(struct hl_device *hdev);
void hl_set_max_power(struct hl_device *hdev);
int hl_set_voltage(struct hl_device *hdev,
                        int sensor_index, u32 attr, long value);
int hl_set_current(struct hl_device *hdev,
                        int sensor_index, u32 attr, long value);

#ifdef CONFIG_DEBUG_FS

void hl_debugfs_init(void);
void hl_debugfs_fini(void);
void hl_debugfs_add_device(struct hl_device *hdev);
void hl_debugfs_remove_device(struct hl_device *hdev);
void hl_debugfs_add_file(struct hl_fpriv *hpriv);
void hl_debugfs_remove_file(struct hl_fpriv *hpriv);
void hl_debugfs_add_cb(struct hl_cb *cb);
void hl_debugfs_remove_cb(struct hl_cb *cb);
void hl_debugfs_add_cs(struct hl_cs *cs);
void hl_debugfs_remove_cs(struct hl_cs *cs);
void hl_debugfs_add_job(struct hl_device *hdev, struct hl_cs_job *job);
void hl_debugfs_remove_job(struct hl_device *hdev, struct hl_cs_job *job);
void hl_debugfs_add_userptr(struct hl_device *hdev, struct hl_userptr *userptr);
void hl_debugfs_remove_userptr(struct hl_device *hdev,
                                struct hl_userptr *userptr);
void hl_debugfs_add_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx);
void hl_debugfs_remove_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx);

#else

static inline void __init hl_debugfs_init(void)
{
}

static inline void hl_debugfs_fini(void)
{
}

static inline void hl_debugfs_add_device(struct hl_device *hdev)
{
}

static inline void hl_debugfs_remove_device(struct hl_device *hdev)
{
}

static inline void hl_debugfs_add_file(struct hl_fpriv *hpriv)
{
}

static inline void hl_debugfs_remove_file(struct hl_fpriv *hpriv)
{
}

static inline void hl_debugfs_add_cb(struct hl_cb *cb)
{
}

static inline void hl_debugfs_remove_cb(struct hl_cb *cb)
{
}

static inline void hl_debugfs_add_cs(struct hl_cs *cs)
{
}

static inline void hl_debugfs_remove_cs(struct hl_cs *cs)
{
}

static inline void hl_debugfs_add_job(struct hl_device *hdev,
                                        struct hl_cs_job *job)
{
}

static inline void hl_debugfs_remove_job(struct hl_device *hdev,
                                        struct hl_cs_job *job)
{
}

static inline void hl_debugfs_add_userptr(struct hl_device *hdev,
                                        struct hl_userptr *userptr)
{
}

static inline void hl_debugfs_remove_userptr(struct hl_device *hdev,
                                        struct hl_userptr *userptr)
{
}

static inline void hl_debugfs_add_ctx_mem_hash(struct hl_device *hdev,
                                        struct hl_ctx *ctx)
{
}

static inline void hl_debugfs_remove_ctx_mem_hash(struct hl_device *hdev,
                                        struct hl_ctx *ctx)
{
}

#endif

/* IOCTLs */
long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
long hl_ioctl_control(struct file *filep, unsigned int cmd, unsigned long arg);
int hl_cb_ioctl(struct hl_fpriv *hpriv, void *data);
int hl_cs_ioctl(struct hl_fpriv *hpriv, void *data);
int hl_cs_wait_ioctl(struct hl_fpriv *hpriv, void *data);
int hl_mem_ioctl(struct hl_fpriv *hpriv, void *data);

#endif /* HABANALABSP_H_ */