#ifndef __DRM_DRM_LEGACY_H__
#define __DRM_DRM_LEGACY_H__
/*
 * Legacy driver interfaces for the Direct Rendering Manager
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * Copyright (c) 2009-2010, Code Aurora Forum.
 * All rights reserved.
 * Copyright © 2014 Intel Corporation
 *   Daniel Vetter <daniel.vetter@ffwll.ch>
 *
 * Author: Rickard E. (Rik) Faith <faith@valinux.com>
 * Author: Gareth Hughes <gareth@valinux.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/agp_backend.h>

#include <drm/drm.h>
#include <drm/drm_auth.h>
#include <drm/drm_hashtab.h>

struct drm_device;
struct drm_driver;
struct file;
struct pci_driver;

/*
 * Legacy Support for palateontologic DRM drivers
 *
 * If you add a new driver and it uses any of these functions or structures,
 * you're doing it terribly wrong.
 */

/**
 * DMA buffer.
 */
struct drm_buf {
        int idx;                       /**< Index into master buflist */
        int total;                     /**< Buffer size */
        int order;                     /**< log-base-2(total) */
        int used;                      /**< Amount of buffer in use (for DMA) */
        unsigned long offset;          /**< Byte offset (used internally) */
        void *address;                 /**< Address of buffer */
        unsigned long bus_address;     /**< Bus address of buffer */
        struct drm_buf *next;          /**< Kernel-only: used for free list */
        __volatile__ int waiting;      /**< On kernel DMA queue */
        __volatile__ int pending;      /**< On hardware DMA queue */
        struct drm_file *file_priv;    /**< Private of holding file descr */
        int context;                   /**< Kernel queue for this buffer */
        int while_locked;              /**< Dispatch this buffer while locked */
        enum {
                DRM_LIST_NONE = 0,
                DRM_LIST_FREE = 1,
                DRM_LIST_WAIT = 2,
                DRM_LIST_PEND = 3,
                DRM_LIST_PRIO = 4,
                DRM_LIST_RECLAIM = 5
        } list;                        /**< Which list we're on */

        int dev_priv_size;               /**< Size of buffer private storage */
        void *dev_private;               /**< Per-buffer private storage */
};

typedef struct drm_dma_handle {
        dma_addr_t busaddr;
        void *vaddr;
        size_t size;
} drm_dma_handle_t;

/**
 * Buffer entry.  There is one of this for each buffer size order.
 */
struct drm_buf_entry {
        int buf_size;                   /**< size */
        int buf_count;                  /**< number of buffers */
        struct drm_buf *buflist;                /**< buffer list */
        int seg_count;
        int page_order;
        struct drm_dma_handle **seglist;

        int low_mark;                   /**< Low water mark */
        int high_mark;                  /**< High water mark */
};

/**
 * DMA data.
 */
struct drm_device_dma {

        struct drm_buf_entry bufs[DRM_MAX_ORDER + 1];   /**< buffers, grouped by their size order */
        int buf_count;                  /**< total number of buffers */
        struct drm_buf **buflist;               /**< Vector of pointers into drm_device_dma::bufs */
        int seg_count;
        int page_count;                 /**< number of pages */
        unsigned long *pagelist;        /**< page list */
        unsigned long byte_count;
        enum {
                _DRM_DMA_USE_AGP = 0x01,
                _DRM_DMA_USE_SG = 0x02,
                _DRM_DMA_USE_FB = 0x04,
                _DRM_DMA_USE_PCI_RO = 0x08
        } flags;

};

/**
 * Scatter-gather memory.
 */
struct drm_sg_mem {
        unsigned long handle;
        void *virtual;
        int pages;
        struct page **pagelist;
        dma_addr_t *busaddr;
};

/**
 * Kernel side of a mapping
 */
struct drm_local_map {
        dma_addr_t offset;       /**< Requested physical address (0 for SAREA)*/
        unsigned long size;      /**< Requested physical size (bytes) */
        enum drm_map_type type;  /**< Type of memory to map */
        enum drm_map_flags flags;        /**< Flags */
        void *handle;            /**< User-space: "Handle" to pass to mmap() */
                                 /**< Kernel-space: kernel-virtual address */
        int mtrr;                /**< MTRR slot used */
};

typedef struct drm_local_map drm_local_map_t;

/**
 * Mappings list
 */
struct drm_map_list {
        struct list_head head;          /**< list head */
        struct drm_hash_item hash;
        struct drm_local_map *map;      /**< mapping */
        uint64_t user_token;
        struct drm_master *master;
};

int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
                      unsigned int size, enum drm_map_type type,
                      enum drm_map_flags flags, struct drm_local_map **map_p);
struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);

int drm_legacy_addbufs_agp(struct drm_device *d, struct drm_buf_desc *req);
int drm_legacy_addbufs_pci(struct drm_device *d, struct drm_buf_desc *req);

/**
 * Test that the hardware lock is held by the caller, returning otherwise.
 *
 * \param dev DRM device.
 * \param filp file pointer of the caller.
 */
#define LOCK_TEST_WITH_RETURN( dev, _file_priv )                                \
do {                                                                            \
        if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) ||       \
            _file_priv->master->lock.file_priv != _file_priv)   {               \
                DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
                           __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
                           _file_priv->master->lock.file_priv, _file_priv);     \
                return -EINVAL;                                                 \
        }                                                                       \
} while (0)

void drm_legacy_idlelock_take(struct drm_lock_data *lock);
void drm_legacy_idlelock_release(struct drm_lock_data *lock);

/* drm_pci.c */

#ifdef CONFIG_PCI

int drm_legacy_pci_init(const struct drm_driver *driver,
                        struct pci_driver *pdriver);
void drm_legacy_pci_exit(const struct drm_driver *driver,
                         struct pci_driver *pdriver);

#else

static inline struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev,
                                                   size_t size, size_t align)
{
        return NULL;
}

static inline void drm_pci_free(struct drm_device *dev,
                                struct drm_dma_handle *dmah)
{
}

static inline int drm_legacy_pci_init(const struct drm_driver *driver,
                                      struct pci_driver *pdriver)
{
        return -EINVAL;
}

static inline void drm_legacy_pci_exit(const struct drm_driver *driver,
                                       struct pci_driver *pdriver)
{
}

#endif

/*
 * AGP Support
 */

struct drm_agp_head {
        struct agp_kern_info agp_info;
        struct list_head memory;
        unsigned long mode;
        struct agp_bridge_data *bridge;
        int enabled;
        int acquired;
        unsigned long base;
        int agp_mtrr;
        int cant_use_aperture;
        unsigned long page_mask;
};

#if IS_ENABLED(CONFIG_DRM_LEGACY) && IS_ENABLED(CONFIG_AGP)
struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev);
int drm_legacy_agp_acquire(struct drm_device *dev);
int drm_legacy_agp_release(struct drm_device *dev);
int drm_legacy_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
int drm_legacy_agp_info(struct drm_device *dev, struct drm_agp_info *info);
int drm_legacy_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
int drm_legacy_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
int drm_legacy_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
int drm_legacy_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
#else
static inline struct drm_agp_head *drm_legacy_agp_init(struct drm_device *dev)
{
        return NULL;
}

static inline int drm_legacy_agp_acquire(struct drm_device *dev)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_release(struct drm_device *dev)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_enable(struct drm_device *dev,
                                        struct drm_agp_mode mode)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_info(struct drm_device *dev,
                                      struct drm_agp_info *info)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_alloc(struct drm_device *dev,
                                       struct drm_agp_buffer *request)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_free(struct drm_device *dev,
                                      struct drm_agp_buffer *request)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_unbind(struct drm_device *dev,
                                        struct drm_agp_binding *request)
{
        return -ENODEV;
}

static inline int drm_legacy_agp_bind(struct drm_device *dev,
                                      struct drm_agp_binding *request)
{
        return -ENODEV;
}
#endif

/* drm_memory.c */
void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);

#endif /* __DRM_DRM_LEGACY_H__ */