drm/xe/xe_vm.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2021 Intel Corporation
 */

#ifndef _XE_VM_H_
#define _XE_VM_H_

#include "xe_assert.h"
#include "xe_bo_types.h"
#include "xe_macros.h"
#include "xe_map.h"
#include "xe_vm_types.h"

struct drm_device;
struct drm_printer;
struct drm_file;

struct ttm_buffer_object;
struct ttm_validate_buffer;

struct xe_exec_queue;
struct xe_file;
struct xe_sync_entry;
struct drm_exec;

struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags);

struct xe_vm *xe_vm_lookup(struct xe_file *xef, u32 id);
int xe_vma_cmp_vma_cb(const void *key, const struct rb_node *node);

static inline struct xe_vm *xe_vm_get(struct xe_vm *vm)
{
	drm_gpuvm_get(&vm->gpuvm);
	return vm;
}

static inline void xe_vm_put(struct xe_vm *vm)
{
	drm_gpuvm_put(&vm->gpuvm);
}

int xe_vm_lock(struct xe_vm *vm, bool intr);

void xe_vm_unlock(struct xe_vm *vm);

static inline bool xe_vm_is_closed(struct xe_vm *vm)
{
	/* Only guaranteed not to change when vm->lock is held */
	return !vm->size;
}

static inline bool xe_vm_is_banned(struct xe_vm *vm)
{
	return vm->flags & XE_VM_FLAG_BANNED;
}

static inline bool xe_vm_is_closed_or_banned(struct xe_vm *vm)
{
	lockdep_assert_held(&vm->lock);
	return xe_vm_is_closed(vm) || xe_vm_is_banned(vm);
}

struct xe_vma *
xe_vm_find_overlapping_vma(struct xe_vm *vm, u64 start, u64 range);

/**
 * xe_vm_has_scratch() - Whether the vm is configured for scratch PTEs
 * @vm: The vm
 *
 * Return: whether the vm populates unmapped areas with scratch PTEs
 */
static inline bool xe_vm_has_scratch(const struct xe_vm *vm)
{
	return vm->flags & XE_VM_FLAG_SCRATCH_PAGE;
}

/**
 * gpuvm_to_vm() - Return the embedding xe_vm from a struct drm_gpuvm pointer
 * @gpuvm: The struct drm_gpuvm pointer
 *
 * Return: Pointer to the embedding struct xe_vm.
 */
static inline struct xe_vm *gpuvm_to_vm(struct drm_gpuvm *gpuvm)
{
	return container_of(gpuvm, struct xe_vm, gpuvm);
}

static inline struct xe_vm *gpuva_to_vm(struct drm_gpuva *gpuva)
{
	return gpuvm_to_vm(gpuva->vm);
}

static inline struct xe_vma *gpuva_to_vma(struct drm_gpuva *gpuva)
{
	return container_of(gpuva, struct xe_vma, gpuva);
}

static inline struct xe_vma_op *gpuva_op_to_vma_op(struct drm_gpuva_op *op)
{
	return container_of(op, struct xe_vma_op, base);
}

/**
 * DOC: Provide accessors for vma members to facilitate easy change of
 * implementation.
 */
static inline u64 xe_vma_start(struct xe_vma *vma)
{
	return vma->gpuva.va.addr;
}

static inline u64 xe_vma_size(struct xe_vma *vma)
{
	return vma->gpuva.va.range;
}

static inline u64 xe_vma_end(struct xe_vma *vma)
{
	return xe_vma_start(vma) + xe_vma_size(vma);
}

static inline u64 xe_vma_bo_offset(struct xe_vma *vma)
{
	return vma->gpuva.gem.offset;
}

static inline struct xe_bo *xe_vma_bo(struct xe_vma *vma)
{
	return !vma->gpuva.gem.obj ? NULL :
		container_of(vma->gpuva.gem.obj, struct xe_bo, ttm.base);
}

static inline struct xe_vm *xe_vma_vm(struct xe_vma *vma)
{
	return container_of(vma->gpuva.vm, struct xe_vm, gpuvm);
}

static inline bool xe_vma_read_only(struct xe_vma *vma)
{
	return vma->gpuva.flags & XE_VMA_READ_ONLY;
}

static inline u64 xe_vma_userptr(struct xe_vma *vma)
{
	return vma->gpuva.gem.offset;
}

static inline bool xe_vma_is_null(struct xe_vma *vma)
{
	return vma->gpuva.flags & DRM_GPUVA_SPARSE;
}

static inline bool xe_vma_has_no_bo(struct xe_vma *vma)
{
	return !xe_vma_bo(vma);
}

static inline bool xe_vma_is_userptr(struct xe_vma *vma)
{
	return xe_vma_has_no_bo(vma) && !xe_vma_is_null(vma);
}

/**
 * to_userptr_vma() - Return a pointer to an embedding userptr vma
 * @vma: Pointer to the embedded struct xe_vma
 *
 * Return: Pointer to the embedding userptr vma
 */
static inline struct xe_userptr_vma *to_userptr_vma(struct xe_vma *vma)
{
	xe_assert(xe_vma_vm(vma)->xe, xe_vma_is_userptr(vma));
	return container_of(vma, struct xe_userptr_vma, vma);
}

u64 xe_vm_pdp4_descriptor(struct xe_vm *vm, struct xe_tile *tile);

int xe_vm_create_ioctl(struct drm_device *dev, void *data,
		       struct drm_file *file);
int xe_vm_destroy_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file);
int xe_vm_bind_ioctl(struct drm_device *dev, void *data,
		     struct drm_file *file);

void xe_vm_close_and_put(struct xe_vm *vm);

static inline bool xe_vm_in_fault_mode(struct xe_vm *vm)
{
	return vm->flags & XE_VM_FLAG_FAULT_MODE;
}

static inline bool xe_vm_in_lr_mode(struct xe_vm *vm)
{
	return vm->flags & XE_VM_FLAG_LR_MODE;
}

static inline bool xe_vm_in_preempt_fence_mode(struct xe_vm *vm)
{
	return xe_vm_in_lr_mode(vm) && !xe_vm_in_fault_mode(vm);
}

int xe_vm_add_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q);
void xe_vm_remove_compute_exec_queue(struct xe_vm *vm, struct xe_exec_queue *q);

int xe_vm_userptr_pin(struct xe_vm *vm);

int __xe_vm_userptr_needs_repin(struct xe_vm *vm);

int xe_vm_userptr_check_repin(struct xe_vm *vm);

int xe_vm_rebind(struct xe_vm *vm, bool rebind_worker);
struct dma_fence *xe_vma_rebind(struct xe_vm *vm, struct xe_vma *vma,
				u8 tile_mask);

int xe_vm_invalidate_vma(struct xe_vma *vma);

static inline void xe_vm_queue_rebind_worker(struct xe_vm *vm)
{
	xe_assert(vm->xe, xe_vm_in_preempt_fence_mode(vm));
	queue_work(vm->xe->ordered_wq, &vm->preempt.rebind_work);
}

/**
 * xe_vm_reactivate_rebind() - Reactivate the rebind functionality on compute
 * vms.
 * @vm: The vm.
 *
 * If the rebind functionality on a compute vm was disabled due
 * to nothing to execute. Reactivate it and run the rebind worker.
 * This function should be called after submitting a batch to a compute vm.
 */
static inline void xe_vm_reactivate_rebind(struct xe_vm *vm)
{
	if (xe_vm_in_preempt_fence_mode(vm) && vm->preempt.rebind_deactivated) {
		vm->preempt.rebind_deactivated = false;
		xe_vm_queue_rebind_worker(vm);
	}
}

int xe_vma_userptr_pin_pages(struct xe_userptr_vma *uvma);

int xe_vma_userptr_check_repin(struct xe_userptr_vma *uvma);

bool xe_vm_validate_should_retry(struct drm_exec *exec, int err, ktime_t *end);

int xe_vm_lock_vma(struct drm_exec *exec, struct xe_vma *vma);

int xe_vm_validate_rebind(struct xe_vm *vm, struct drm_exec *exec,
			  unsigned int num_fences);

/**
 * xe_vm_resv() - Return's the vm's reservation object
 * @vm: The vm
 *
 * Return: Pointer to the vm's reservation object.
 */
static inline struct dma_resv *xe_vm_resv(struct xe_vm *vm)
{
	return drm_gpuvm_resv(&vm->gpuvm);
}

void xe_vm_kill(struct xe_vm *vm, bool unlocked);

/**
 * xe_vm_assert_held(vm) - Assert that the vm's reservation object is held.
 * @vm: The vm
 */
#define xe_vm_assert_held(vm) dma_resv_assert_held(xe_vm_resv(vm))

#if IS_ENABLED(CONFIG_DRM_XE_DEBUG_VM)
#define vm_dbg drm_dbg
#else
__printf(2, 3)
static inline void vm_dbg(const struct drm_device *dev,
			  const char *format, ...)
{ /* noop */ }
#endif
#endif

struct xe_vm_snapshot *xe_vm_snapshot_capture(struct xe_vm *vm);
void xe_vm_snapshot_capture_delayed(struct xe_vm_snapshot *snap);
void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p);
void xe_vm_snapshot_free(struct xe_vm_snapshot *snap);