/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2024, Advanced Micro Devices, Inc.
 */

#ifndef _AMDXDNA_GEM_H_
#define _AMDXDNA_GEM_H_

#include <linux/hmm.h>
#include "amdxdna_pci_drv.h"

struct amdxdna_umap {
        struct vm_area_struct           *vma;
        struct mmu_interval_notifier    notifier;
        struct hmm_range                range;
        struct work_struct              hmm_unreg_work;
        struct amdxdna_gem_obj          *abo;
        struct list_head                node;
        struct kref                     refcnt;
        bool                            invalid;
        bool                            unmapped;
};

struct amdxdna_mem {
        u64                             userptr;
        void                            *kva;
        u64                             dev_addr;
        size_t                          size;
        struct page                     **pages;
        u32                             nr_pages;
        struct list_head                umap_list;
        bool                            map_invalid;
};

struct amdxdna_gem_obj {
        struct drm_gem_shmem_object     base;
        struct amdxdna_client           *client;
        u8                              type;
        bool                            pinned;
        struct mutex                    lock; /* Protects: pinned */
        struct amdxdna_mem              mem;

        /* Below members is uninitialized when needed */
        struct drm_mm                   mm; /* For AMDXDNA_BO_DEV_HEAP */
        struct drm_mm_node              mm_node; /* For AMDXDNA_BO_DEV */
        u32                             assigned_hwctx;
        struct dma_buf                  *dma_buf;
        struct dma_buf_attachment       *attach;
};

#define to_gobj(obj)    (&(obj)->base.base)
#define is_import_bo(obj) ((obj)->attach)

static inline struct amdxdna_gem_obj *to_xdna_obj(struct drm_gem_object *gobj)
{
        return container_of(gobj, struct amdxdna_gem_obj, base.base);
}

struct amdxdna_gem_obj *amdxdna_gem_get_obj(struct amdxdna_client *client,
                                            u32 bo_hdl, u8 bo_type);
static inline void amdxdna_gem_put_obj(struct amdxdna_gem_obj *abo)
{
        drm_gem_object_put(to_gobj(abo));
}

static inline u64 amdxdna_dev_bo_offset(struct amdxdna_gem_obj *abo)
{
        return abo->mem.dev_addr - abo->client->dev_heap->mem.dev_addr;
}

void amdxdna_umap_put(struct amdxdna_umap *mapp);

struct drm_gem_object *
amdxdna_gem_create_object_cb(struct drm_device *dev, size_t size);
struct drm_gem_object *
amdxdna_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf);
struct amdxdna_gem_obj *
amdxdna_drm_alloc_dev_bo(struct drm_device *dev,
                         struct amdxdna_drm_create_bo *args,
                         struct drm_file *filp);

int amdxdna_gem_pin_nolock(struct amdxdna_gem_obj *abo);
int amdxdna_gem_pin(struct amdxdna_gem_obj *abo);
void amdxdna_gem_unpin(struct amdxdna_gem_obj *abo);

int amdxdna_drm_create_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
int amdxdna_drm_get_bo_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
int amdxdna_drm_sync_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);

#endif /* _AMDXDNA_GEM_H_ */