/*
 *
 * (C) COPYRIGHT 2010-2018 ARM Limited. All rights reserved.
 *
 * This program is free software and is provided to you under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation, and any use by you of this program is subject to the terms
 * of such GNU licence.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you can access it online at
 * http://www.gnu.org/licenses/gpl-2.0.html.
 *
 * SPDX-License-Identifier: GPL-2.0
 *
 */


#ifndef _KBASE_H_
#define _KBASE_H_

#include <mali_malisw.h>

#include <mali_kbase_debug.h>

#include <linux/atomic.h>
#include <linux/highmem.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/sched.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0))
#include <linux/sched/mm.h>
#endif
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>
#include <linux/workqueue.h>

#include "mali_base_kernel.h"
#include <mali_kbase_linux.h>

/*
 * Include mali_kbase_defs.h first as this provides types needed by other local
 * header files.
 */
#include "mali_kbase_defs.h"

#include "mali_kbase_context.h"
#include "mali_kbase_strings.h"
#include "mali_kbase_mem_lowlevel.h"
#include "mali_kbase_trace_timeline.h"
#include "mali_kbase_js.h"
#include "mali_kbase_utility.h"
#include "mali_kbase_mem.h"
#include "mali_kbase_gpu_memory_debugfs.h"
#include "mali_kbase_mem_profile_debugfs.h"
#include "mali_kbase_debug_job_fault.h"
#include "mali_kbase_jd_debugfs.h"
#include "mali_kbase_gpuprops.h"
#include "mali_kbase_jm.h"
#include "mali_kbase_vinstr.h"

#include "ipa/mali_kbase_ipa.h"

#ifdef CONFIG_GPU_TRACEPOINTS
#include <trace/events/gpu.h>
#endif

#ifndef u64_to_user_ptr
/* Introduced in Linux v4.6 */
#define u64_to_user_ptr(x) ((void __user *)(uintptr_t)x)
#endif

/*
 * Kernel-side Base (KBase) APIs
 */

struct kbase_device *kbase_device_alloc(void);
/*
* note: configuration attributes member of kbdev needs to have
* been setup before calling kbase_device_init
*/

/*
* API to acquire device list semaphore and return pointer
* to the device list head
*/
const struct list_head *kbase_dev_list_get(void);
/* API to release the device list semaphore */
void kbase_dev_list_put(const struct list_head *dev_list);

int kbase_device_init(struct kbase_device * const kbdev);
void kbase_device_term(struct kbase_device *kbdev);
void kbase_device_free(struct kbase_device *kbdev);
int kbase_device_has_feature(struct kbase_device *kbdev, u32 feature);

/* Needed for gator integration and for reporting vsync information */
struct kbase_device *kbase_find_device(int minor);
void kbase_release_device(struct kbase_device *kbdev);

void kbase_set_profiling_control(struct kbase_device *kbdev, u32 control, u32 value);


/**
 * kbase_get_unmapped_area() - get an address range which is currently
 *                             unmapped.
 * @filp: File operations associated with kbase device.
 * @addr: CPU mapped address (set to 0 since MAP_FIXED mapping is not allowed
 *        as Mali GPU driver decides about the mapping).
 * @len: Length of the address range.
 * @pgoff: Page offset within the GPU address space of the kbase context.
 * @flags: Flags for the allocation.
 *
 * Finds the unmapped address range which satisfies requirements specific to
 * GPU and those provided by the call parameters.
 *
 * 1) Requirement for allocations greater than 2MB:
 * - alignment offset is set to 2MB and the alignment mask to 2MB decremented
 * by 1.
 *
 * 2) Requirements imposed for the shader memory alignment:
 * - alignment is decided by the number of GPU pc bits which can be read from
 * GPU properties of the device associated with this kbase context; alignment
 * offset is set to this value in bytes and the alignment mask to the offset
 * decremented by 1.
 * - allocations must not to be at 4GB boundaries. Such cases are indicated
 * by the flag KBASE_REG_GPU_NX not being set (check the flags of the kbase
 * region). 4GB boundaries can be checked against @ref BASE_MEM_MASK_4GB.
 *
 * 3) Requirements imposed for tiler memory alignment, cases indicated by
 * the flag @ref KBASE_REG_TILER_ALIGN_TOP (check the flags of the kbase
 * region):
 * - alignment offset is set to the difference between the kbase region
 * extent (converted from the original value in pages to bytes) and the kbase
 * region initial_commit (also converted from the original value in pages to
 * bytes); alignment mask is set to the kbase region extent in bytes and
 * decremented by 1.
 *
 * Return: if successful, address of the unmapped area aligned as required;
 *         error code (negative) in case of failure;
 */
unsigned long kbase_get_unmapped_area(struct file *filp,
		const unsigned long addr, const unsigned long len,
		const unsigned long pgoff, const unsigned long flags);

int kbase_jd_init(struct kbase_context *kctx);
void kbase_jd_exit(struct kbase_context *kctx);

/**
 * kbase_jd_submit - Submit atoms to the job dispatcher
 *
 * @kctx: The kbase context to submit to
 * @user_addr: The address in user space of the struct base_jd_atom_v2 array
 * @nr_atoms: The number of atoms in the array
 * @stride: sizeof(struct base_jd_atom_v2)
 * @uk6_atom: true if the atoms are legacy atoms (struct base_jd_atom_v2_uk6)
 *
 * Return: 0 on success or error code
 */
int kbase_jd_submit(struct kbase_context *kctx,
		void __user *user_addr, u32 nr_atoms, u32 stride,
		bool uk6_atom);

/**
 * kbase_jd_done_worker - Handle a job completion
 * @data: a &struct work_struct
 *
 * This function requeues the job from the runpool (if it was soft-stopped or
 * removed from NEXT registers).
 *
 * Removes it from the system if it finished/failed/was cancelled.
 *
 * Resolves dependencies to add dependent jobs to the context, potentially
 * starting them if necessary (which may add more references to the context)
 *
 * Releases the reference to the context from the no-longer-running job.
 *
 * Handles retrying submission outside of IRQ context if it failed from within
 * IRQ context.
 */
void kbase_jd_done_worker(struct work_struct *data);

void kbase_jd_done(struct kbase_jd_atom *katom, int slot_nr, ktime_t *end_timestamp,
		kbasep_js_atom_done_code done_code);
void kbase_jd_cancel(struct kbase_device *kbdev, struct kbase_jd_atom *katom);
void kbase_jd_zap_context(struct kbase_context *kctx);
bool jd_done_nolock(struct kbase_jd_atom *katom,
		struct list_head *completed_jobs_ctx);
void kbase_jd_free_external_resources(struct kbase_jd_atom *katom);
bool jd_submit_atom(struct kbase_context *kctx,
			 const struct base_jd_atom_v2 *user_atom,
			 struct kbase_jd_atom *katom);
void kbase_jd_dep_clear_locked(struct kbase_jd_atom *katom);

void kbase_job_done(struct kbase_device *kbdev, u32 done);

/**
 * kbase_job_slot_ctx_priority_check_locked(): - Check for lower priority atoms
 *                                               and soft stop them
 * @kctx: Pointer to context to check.
 * @katom: Pointer to priority atom.
 *
 * Atoms from @kctx on the same job slot as @katom, which have lower priority
 * than @katom will be soft stopped and put back in the queue, so that atoms
 * with higher priority can run.
 *
 * The hwaccess_lock must be held when calling this function.
 */
void kbase_job_slot_ctx_priority_check_locked(struct kbase_context *kctx,
				struct kbase_jd_atom *katom);

void kbase_job_slot_softstop(struct kbase_device *kbdev, int js,
		struct kbase_jd_atom *target_katom);
void kbase_job_slot_softstop_swflags(struct kbase_device *kbdev, int js,
		struct kbase_jd_atom *target_katom, u32 sw_flags);
void kbase_job_slot_hardstop(struct kbase_context *kctx, int js,
		struct kbase_jd_atom *target_katom);
void kbase_job_check_enter_disjoint(struct kbase_device *kbdev, u32 action,
		base_jd_core_req core_reqs, struct kbase_jd_atom *target_katom);
void kbase_job_check_leave_disjoint(struct kbase_device *kbdev,
		struct kbase_jd_atom *target_katom);

void kbase_event_post(struct kbase_context *ctx, struct kbase_jd_atom *event);
int kbase_event_dequeue(struct kbase_context *ctx, struct base_jd_event_v2 *uevent);
int kbase_event_pending(struct kbase_context *ctx);
int kbase_event_init(struct kbase_context *kctx);
void kbase_event_close(struct kbase_context *kctx);
void kbase_event_cleanup(struct kbase_context *kctx);
void kbase_event_wakeup(struct kbase_context *kctx);

int kbase_process_soft_job(struct kbase_jd_atom *katom);
int kbase_prepare_soft_job(struct kbase_jd_atom *katom);
void kbase_finish_soft_job(struct kbase_jd_atom *katom);
void kbase_cancel_soft_job(struct kbase_jd_atom *katom);
void kbase_resume_suspended_soft_jobs(struct kbase_device *kbdev);
void kbasep_remove_waiting_soft_job(struct kbase_jd_atom *katom);
#if defined(CONFIG_SYNC) || defined(CONFIG_SYNC_FILE)
void kbase_soft_event_wait_callback(struct kbase_jd_atom *katom);
#endif
int kbase_soft_event_update(struct kbase_context *kctx,
			    u64 event,
			    unsigned char new_status);

bool kbase_replay_process(struct kbase_jd_atom *katom);

void kbasep_soft_job_timeout_worker(struct timer_list *timer);
void kbasep_complete_triggered_soft_events(struct kbase_context *kctx, u64 evt);

/* api used internally for register access. Contains validation and tracing */
void kbase_device_trace_register_access(struct kbase_context *kctx, enum kbase_reg_access_type type, u16 reg_offset, u32 reg_value);
int kbase_device_trace_buffer_install(
		struct kbase_context *kctx, u32 *tb, size_t size);
void kbase_device_trace_buffer_uninstall(struct kbase_context *kctx);

void kbasep_as_do_poke(struct work_struct *work);

/** Returns the name associated with a Mali exception code
 *
 * This function is called from the interrupt handler when a GPU fault occurs.
 * It reports the details of the fault using KBASE_DEBUG_PRINT_WARN.
 *
 * @param[in] kbdev     The kbase device that the GPU fault occurred from.
 * @param[in] exception_code  exception code
 * @return name associated with the exception code
 */
const char *kbase_exception_name(struct kbase_device *kbdev,
		u32 exception_code);

/**
 * Check whether a system suspend is in progress, or has already been suspended
 *
 * The caller should ensure that either kbdev->pm.active_count_lock is held, or
 * a dmb was executed recently (to ensure the value is most
 * up-to-date). However, without a lock the value could change afterwards.
 *
 * @return false if a suspend is not in progress
 * @return !=false otherwise
 */
static inline bool kbase_pm_is_suspending(struct kbase_device *kbdev)
{
	return kbdev->pm.suspending;
}

/**
 * Return the atom's ID, as was originally supplied by userspace in
 * base_jd_atom_v2::atom_number
 */
static inline int kbase_jd_atom_id(struct kbase_context *kctx, struct kbase_jd_atom *katom)
{
	int result;

	KBASE_DEBUG_ASSERT(kctx);
	KBASE_DEBUG_ASSERT(katom);
	KBASE_DEBUG_ASSERT(katom->kctx == kctx);

	result = katom - &kctx->jctx.atoms[0];
	KBASE_DEBUG_ASSERT(result >= 0 && result <= BASE_JD_ATOM_COUNT);
	return result;
}

/**
 * kbase_jd_atom_from_id - Return the atom structure for the given atom ID
 * @kctx: Context pointer
 * @id:   ID of atom to retrieve
 *
 * Return: Pointer to struct kbase_jd_atom associated with the supplied ID
 */
static inline struct kbase_jd_atom *kbase_jd_atom_from_id(
		struct kbase_context *kctx, int id)
{
	return &kctx->jctx.atoms[id];
}

/**
 * Initialize the disjoint state
 *
 * The disjoint event count and state are both set to zero.
 *
 * Disjoint functions usage:
 *
 * The disjoint event count should be incremented whenever a disjoint event occurs.
 *
 * There are several cases which are regarded as disjoint behavior. Rather than just increment
 * the counter during disjoint events we also increment the counter when jobs may be affected
 * by what the GPU is currently doing. To facilitate this we have the concept of disjoint state.
 *
 * Disjoint state is entered during GPU reset and for the entire time that an atom is replaying
 * (as part of the replay workaround). Increasing the disjoint state also increases the count of
 * disjoint events.
 *
 * The disjoint state is then used to increase the count of disjoint events during job submission
 * and job completion. Any atom submitted or completed while the disjoint state is greater than
 * zero is regarded as a disjoint event.
 *
 * The disjoint event counter is also incremented immediately whenever a job is soft stopped
 * and during context creation.
 *
 * @param kbdev The kbase device
 */
void kbase_disjoint_init(struct kbase_device *kbdev);

/**
 * Increase the count of disjoint events
 * called when a disjoint event has happened
 *
 * @param kbdev The kbase device
 */
void kbase_disjoint_event(struct kbase_device *kbdev);

/**
 * Increase the count of disjoint events only if the GPU is in a disjoint state
 *
 * This should be called when something happens which could be disjoint if the GPU
 * is in a disjoint state. The state refcount keeps track of this.
 *
 * @param kbdev The kbase device
 */
void kbase_disjoint_event_potential(struct kbase_device *kbdev);

/**
 * Returns the count of disjoint events
 *
 * @param kbdev The kbase device
 * @return the count of disjoint events
 */
u32 kbase_disjoint_event_get(struct kbase_device *kbdev);

/**
 * Increment the refcount state indicating that the GPU is in a disjoint state.
 *
 * Also Increment the disjoint event count (calls @ref kbase_disjoint_event)
 * eventually after the disjoint state has completed @ref kbase_disjoint_state_down
 * should be called
 *
 * @param kbdev The kbase device
 */
void kbase_disjoint_state_up(struct kbase_device *kbdev);

/**
 * Decrement the refcount state
 *
 * Also Increment the disjoint event count (calls @ref kbase_disjoint_event)
 *
 * Called after @ref kbase_disjoint_state_up once the disjoint state is over
 *
 * @param kbdev The kbase device
 */
void kbase_disjoint_state_down(struct kbase_device *kbdev);

/**
 * If a job is soft stopped and the number of contexts is >= this value
 * it is reported as a disjoint event
 */
#define KBASE_DISJOINT_STATE_INTERLEAVED_CONTEXT_COUNT_THRESHOLD 2

#if !defined(UINT64_MAX)
	#define UINT64_MAX ((uint64_t)0xFFFFFFFFFFFFFFFFULL)
#endif

#if KBASE_TRACE_ENABLE
void kbasep_trace_debugfs_init(struct kbase_device *kbdev);

#ifndef CONFIG_MALI_SYSTEM_TRACE
/** Add trace values about a job-slot
 *
 * @note Any functions called through this macro will still be evaluated in
 * Release builds (CONFIG_MALI_DEBUG not defined). Therefore, when KBASE_TRACE_ENABLE == 0 any
 * functions called to get the parameters supplied to this macro must:
 * - be static or static inline
 * - must just return 0 and have no other statements present in the body.
 */
#define KBASE_TRACE_ADD_SLOT(kbdev, code, ctx, katom, gpu_addr, jobslot) \
	kbasep_trace_add(kbdev, KBASE_TRACE_CODE(code), ctx, katom, gpu_addr, \
			KBASE_TRACE_FLAG_JOBSLOT, 0, jobslot, 0)

/** Add trace values about a job-slot, with info
 *
 * @note Any functions called through this macro will still be evaluated in
 * Release builds (CONFIG_MALI_DEBUG not defined). Therefore, when KBASE_TRACE_ENABLE == 0 any
 * functions called to get the parameters supplied to this macro must:
 * - be static or static inline
 * - must just return 0 and have no other statements present in the body.
 */
#define KBASE_TRACE_ADD_SLOT_INFO(kbdev, code, ctx, katom, gpu_addr, jobslot, info_val) \
	kbasep_trace_add(kbdev, KBASE_TRACE_CODE(code), ctx, katom, gpu_addr, \
			KBASE_TRACE_FLAG_JOBSLOT, 0, jobslot, info_val)

/** Add trace values about a ctx refcount
 *
 * @note Any functions called through this macro will still be evaluated in
 * Release builds (CONFIG_MALI_DEBUG not defined). Therefore, when KBASE_TRACE_ENABLE == 0 any
 * functions called to get the parameters supplied to this macro must:
 * - be static or static inline
 * - must just return 0 and have no other statements present in the body.
 */
#define KBASE_TRACE_ADD_REFCOUNT(kbdev, code, ctx, katom, gpu_addr, refcount) \
	kbasep_trace_add(kbdev, KBASE_TRACE_CODE(code), ctx, katom, gpu_addr, \
			KBASE_TRACE_FLAG_REFCOUNT, refcount, 0, 0)
/** Add trace values about a ctx refcount, and info
 *
 * @note Any functions called through this macro will still be evaluated in
 * Release builds (CONFIG_MALI_DEBUG not defined). Therefore, when KBASE_TRACE_ENABLE == 0 any
 * functions called to get the parameters supplied to this macro must:
 * - be static or static inline
 * - must just return 0 and have no other statements present in the body.
 */
#define KBASE_TRACE_ADD_REFCOUNT_INFO(kbdev, code, ctx, katom, gpu_addr, refcount, info_val) \
	kbasep_trace_add(kbdev, KBASE_TRACE_CODE(code), ctx, katom, gpu_addr, \
			KBASE_TRACE_FLAG_REFCOUNT, refcount, 0, info_val)

/** Add trace values (no slot or refcount)
 *
 * @note Any functions called through this macro will still be evaluated in
 * Release builds (CONFIG_MALI_DEBUG not defined). Therefore, when KBASE_TRACE_ENABLE == 0 any
 * functions called to get the parameters supplied to this macro must:
 * - be static or static inline
 * - must just return 0 and have no other statements present in the body.
 */
#define KBASE_TRACE_ADD(kbdev, code, ctx, katom, gpu_addr, info_val)     \
	kbasep_trace_add(kbdev, KBASE_TRACE_CODE(code), ctx, katom, gpu_addr, \
			0, 0, 0, info_val)

/** Clear the trace */
#define KBASE_TRACE_CLEAR(kbdev) \
	kbasep_trace_clear(kbdev)

/** Dump the slot trace */
#define KBASE_TRACE_DUMP(kbdev) \
	kbasep_trace_dump(kbdev)

/** PRIVATE - do not use directly. Use KBASE_TRACE_ADD() instead */
void kbasep_trace_add(struct kbase_device *kbdev, enum kbase_trace_code code, void *ctx, struct kbase_jd_atom *katom, u64 gpu_addr, u8 flags, int refcount, int jobslot, unsigned long info_val);
/** PRIVATE - do not use directly. Use KBASE_TRACE_CLEAR() instead */
void kbasep_trace_clear(struct kbase_device *kbdev);
#else /* #ifndef CONFIG_MALI_SYSTEM_TRACE */
/* Dispatch kbase trace events as system trace events */
#include <mali_linux_kbase_trace.h>
#define KBASE_TRACE_ADD_SLOT(kbdev, code, ctx, katom, gpu_addr, jobslot)\
	trace_mali_##code(jobslot, 0)

#define KBASE_TRACE_ADD_SLOT_INFO(kbdev, code, ctx, katom, gpu_addr, jobslot, info_val)\
	trace_mali_##code(jobslot, info_val)

#define KBASE_TRACE_ADD_REFCOUNT(kbdev, code, ctx, katom, gpu_addr, refcount)\
	trace_mali_##code(refcount, 0)

#define KBASE_TRACE_ADD_REFCOUNT_INFO(kbdev, code, ctx, katom, gpu_addr, refcount, info_val)\
	trace_mali_##code(refcount, info_val)

#define KBASE_TRACE_ADD(kbdev, code, ctx, katom, gpu_addr, info_val)\
	trace_mali_##code(gpu_addr, info_val)

#define KBASE_TRACE_CLEAR(kbdev)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(0);\
	} while (0)
#define KBASE_TRACE_DUMP(kbdev)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(0);\
	} while (0)

#endif /* #ifndef CONFIG_MALI_SYSTEM_TRACE */
#else
#define KBASE_TRACE_ADD_SLOT(kbdev, code, ctx, katom, gpu_addr, jobslot)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(code);\
		CSTD_UNUSED(ctx);\
		CSTD_UNUSED(katom);\
		CSTD_UNUSED(gpu_addr);\
		CSTD_UNUSED(jobslot);\
	} while (0)

#define KBASE_TRACE_ADD_SLOT_INFO(kbdev, code, ctx, katom, gpu_addr, jobslot, info_val)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(code);\
		CSTD_UNUSED(ctx);\
		CSTD_UNUSED(katom);\
		CSTD_UNUSED(gpu_addr);\
		CSTD_UNUSED(jobslot);\
		CSTD_UNUSED(info_val);\
		CSTD_NOP(0);\
	} while (0)

#define KBASE_TRACE_ADD_REFCOUNT(kbdev, code, ctx, katom, gpu_addr, refcount)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(code);\
		CSTD_UNUSED(ctx);\
		CSTD_UNUSED(katom);\
		CSTD_UNUSED(gpu_addr);\
		CSTD_UNUSED(refcount);\
		CSTD_NOP(0);\
	} while (0)

#define KBASE_TRACE_ADD_REFCOUNT_INFO(kbdev, code, ctx, katom, gpu_addr, refcount, info_val)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(code);\
		CSTD_UNUSED(ctx);\
		CSTD_UNUSED(katom);\
		CSTD_UNUSED(gpu_addr);\
		CSTD_UNUSED(info_val);\
		CSTD_NOP(0);\
	} while (0)

#define KBASE_TRACE_ADD(kbdev, code, subcode, ctx, katom, val)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(code);\
		CSTD_UNUSED(subcode);\
		CSTD_UNUSED(ctx);\
		CSTD_UNUSED(katom);\
		CSTD_UNUSED(val);\
		CSTD_NOP(0);\
	} while (0)

#define KBASE_TRACE_CLEAR(kbdev)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(0);\
	} while (0)
#define KBASE_TRACE_DUMP(kbdev)\
	do {\
		CSTD_UNUSED(kbdev);\
		CSTD_NOP(0);\
	} while (0)
#endif /* KBASE_TRACE_ENABLE */
/** PRIVATE - do not use directly. Use KBASE_TRACE_DUMP() instead */
void kbasep_trace_dump(struct kbase_device *kbdev);

#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_MALI_NO_MALI)

/* kbase_io_history_init - initialize data struct for register access history
 *
 * @kbdev The register history to initialize
 * @n The number of register accesses that the buffer could hold
 *
 * @return 0 if successfully initialized, failure otherwise
 */
int kbase_io_history_init(struct kbase_io_history *h, u16 n);

/* kbase_io_history_term - uninit all resources for the register access history
 *
 * @h The register history to terminate
 */
void kbase_io_history_term(struct kbase_io_history *h);

/* kbase_io_history_dump - print the register history to the kernel ring buffer
 *
 * @kbdev Pointer to kbase_device containing the register history to dump
 */
void kbase_io_history_dump(struct kbase_device *kbdev);

/**
 * kbase_io_history_resize - resize the register access history buffer.
 *
 * @h: Pointer to a valid register history to resize
 * @new_size: Number of accesses the buffer could hold
 *
 * A successful resize will clear all recent register accesses.
 * If resizing fails for any reason (e.g., could not allocate memory, invalid
 * buffer size) then the original buffer will be kept intact.
 *
 * @return 0 if the buffer was resized, failure otherwise
 */
int kbase_io_history_resize(struct kbase_io_history *h, u16 new_size);

#else /* CONFIG_DEBUG_FS */

#define kbase_io_history_init(...) ((int)0)

#define kbase_io_history_term CSTD_NOP

#define kbase_io_history_dump CSTD_NOP

#define kbase_io_history_resize CSTD_NOP

#endif /* CONFIG_DEBUG_FS */


#endif

extern int meson_gpu_data_invalid_count;
extern int meson_gpu_fault;