/*
 * Copyright (c) 2009-2013, NVIDIA Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __LINUX_HOST1X_H
#define __LINUX_HOST1X_H

#include <linux/device.h>
#include <linux/types.h>

enum host1x_class {
        HOST1X_CLASS_HOST1X = 0x1,
        HOST1X_CLASS_GR2D = 0x51,
        HOST1X_CLASS_GR2D_SB = 0x52,
        HOST1X_CLASS_GR3D = 0x60,
};

struct host1x_client;

struct host1x_client_ops {
        int (*init)(struct host1x_client *client);
        int (*exit)(struct host1x_client *client);
};

struct host1x_client {
        struct list_head list;
        struct device *parent;
        struct device *dev;

        const struct host1x_client_ops *ops;

        enum host1x_class class;
        struct host1x_channel *channel;

        struct host1x_syncpt **syncpts;
        unsigned int num_syncpts;
};

/*
 * host1x buffer objects
 */

struct host1x_bo;
struct sg_table;

struct host1x_bo_ops {
        struct host1x_bo *(*get)(struct host1x_bo *bo);
        void (*put)(struct host1x_bo *bo);
        dma_addr_t (*pin)(struct host1x_bo *bo, struct sg_table **sgt);
        void (*unpin)(struct host1x_bo *bo, struct sg_table *sgt);
        void *(*mmap)(struct host1x_bo *bo);
        void (*munmap)(struct host1x_bo *bo, void *addr);
        void *(*kmap)(struct host1x_bo *bo, unsigned int pagenum);
        void (*kunmap)(struct host1x_bo *bo, unsigned int pagenum, void *addr);
};

struct host1x_bo {
        const struct host1x_bo_ops *ops;
};

static inline void host1x_bo_init(struct host1x_bo *bo,
                                  const struct host1x_bo_ops *ops)
{
        bo->ops = ops;
}

static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo)
{
        return bo->ops->get(bo);
}

static inline void host1x_bo_put(struct host1x_bo *bo)
{
        bo->ops->put(bo);
}

static inline dma_addr_t host1x_bo_pin(struct host1x_bo *bo,
                                       struct sg_table **sgt)
{
        return bo->ops->pin(bo, sgt);
}

static inline void host1x_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt)
{
        bo->ops->unpin(bo, sgt);
}

static inline void *host1x_bo_mmap(struct host1x_bo *bo)
{
        return bo->ops->mmap(bo);
}

static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr)
{
        bo->ops->munmap(bo, addr);
}

static inline void *host1x_bo_kmap(struct host1x_bo *bo, unsigned int pagenum)
{
        return bo->ops->kmap(bo, pagenum);
}

static inline void host1x_bo_kunmap(struct host1x_bo *bo,
                                    unsigned int pagenum, void *addr)
{
        bo->ops->kunmap(bo, pagenum, addr);
}

/*
 * host1x syncpoints
 */

#define HOST1X_SYNCPT_CLIENT_MANAGED    (1 << 0)
#define HOST1X_SYNCPT_HAS_BASE          (1 << 1)

struct host1x_syncpt_base;
struct host1x_syncpt;
struct host1x;

struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id);
u32 host1x_syncpt_id(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_min(struct host1x_syncpt *sp);
u32 host1x_syncpt_read_max(struct host1x_syncpt *sp);
int host1x_syncpt_incr(struct host1x_syncpt *sp);
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
                       u32 *value);
struct host1x_syncpt *host1x_syncpt_request(struct device *dev,
                                            unsigned long flags);
void host1x_syncpt_free(struct host1x_syncpt *sp);

struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp);
u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);

/*
 * host1x channel
 */

struct host1x_channel;
struct host1x_job;

struct host1x_channel *host1x_channel_request(struct device *dev);
void host1x_channel_free(struct host1x_channel *channel);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
void host1x_channel_put(struct host1x_channel *channel);
int host1x_job_submit(struct host1x_job *job);

/*
 * host1x job
 */

struct host1x_reloc {
        struct {
                struct host1x_bo *bo;
                unsigned long offset;
        } cmdbuf;
        struct {
                struct host1x_bo *bo;
                unsigned long offset;
        } target;
        unsigned long shift;
};

struct host1x_job {
        /* When refcount goes to zero, job can be freed */
        struct kref ref;

        /* List entry */
        struct list_head list;

        /* Channel where job is submitted to */
        struct host1x_channel *channel;

        u32 client;

        /* Gathers and their memory */
        struct host1x_job_gather *gathers;
        unsigned int num_gathers;

        /* Wait checks to be processed at submit time */
        struct host1x_waitchk *waitchk;
        unsigned int num_waitchk;
        u32 waitchk_mask;

        /* Array of handles to be pinned & unpinned */
        struct host1x_reloc *relocarray;
        unsigned int num_relocs;
        struct host1x_job_unpin_data *unpins;
        unsigned int num_unpins;

        dma_addr_t *addr_phys;
        dma_addr_t *gather_addr_phys;
        dma_addr_t *reloc_addr_phys;

        /* Sync point id, number of increments and end related to the submit */
        u32 syncpt_id;
        u32 syncpt_incrs;
        u32 syncpt_end;

        /* Maximum time to wait for this job */
        unsigned int timeout;

        /* Index and number of slots used in the push buffer */
        unsigned int first_get;
        unsigned int num_slots;

        /* Copy of gathers */
        size_t gather_copy_size;
        dma_addr_t gather_copy;
        u8 *gather_copy_mapped;

        /* Check if register is marked as an address reg */
        int (*is_addr_reg)(struct device *dev, u32 reg, u32 class);

        /* Request a SETCLASS to this class */
        u32 class;

        /* Add a channel wait for previous ops to complete */
        bool serialize;
};

struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
                                    u32 num_cmdbufs, u32 num_relocs,
                                    u32 num_waitchks);
void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *mem_id,
                           u32 words, u32 offset);
struct host1x_job *host1x_job_get(struct host1x_job *job);
void host1x_job_put(struct host1x_job *job);
int host1x_job_pin(struct host1x_job *job, struct device *dev);
void host1x_job_unpin(struct host1x_job *job);

/*
 * subdevice probe infrastructure
 */

struct host1x_device;

struct host1x_driver {
        const struct of_device_id *subdevs;
        struct list_head list;
        const char *name;

        int (*probe)(struct host1x_device *device);
        int (*remove)(struct host1x_device *device);
};

int host1x_driver_register(struct host1x_driver *driver);
void host1x_driver_unregister(struct host1x_driver *driver);

struct host1x_device {
        struct host1x_driver *driver;
        struct list_head list;
        struct device dev;

        struct mutex subdevs_lock;
        struct list_head subdevs;
        struct list_head active;

        struct mutex clients_lock;
        struct list_head clients;
};

static inline struct host1x_device *to_host1x_device(struct device *dev)
{
        return container_of(dev, struct host1x_device, dev);
}

int host1x_device_init(struct host1x_device *device);
int host1x_device_exit(struct host1x_device *device);

int host1x_client_register(struct host1x_client *client);
int host1x_client_unregister(struct host1x_client *client);

struct tegra_mipi_device;

struct tegra_mipi_device *tegra_mipi_request(struct device *device);
void tegra_mipi_free(struct tegra_mipi_device *device);
int tegra_mipi_calibrate(struct tegra_mipi_device *device);

#endif