/*
 * Copyright (c) 2012-2015, NVIDIA Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef HOST1X_DEV_H
#define HOST1X_DEV_H

#include <linux/device.h>
#include <linux/iommu.h>
#include <linux/iova.h>
#include <linux/platform_device.h>
#include <linux/reset.h>

#include "cdma.h"
#include "channel.h"
#include "intr.h"
#include "job.h"
#include "syncpt.h"

struct host1x_syncpt;
struct host1x_syncpt_base;
struct host1x_channel;
struct host1x_cdma;
struct host1x_job;
struct push_buffer;
struct output;
struct dentry;

struct host1x_channel_ops {
	int (*init)(struct host1x_channel *channel, struct host1x *host,
		    unsigned int id);
	int (*submit)(struct host1x_job *job);
};

struct host1x_cdma_ops {
	void (*start)(struct host1x_cdma *cdma);
	void (*stop)(struct host1x_cdma *cdma);
	void (*flush)(struct  host1x_cdma *cdma);
	int (*timeout_init)(struct host1x_cdma *cdma, unsigned int syncpt);
	void (*timeout_destroy)(struct host1x_cdma *cdma);
	void (*freeze)(struct host1x_cdma *cdma);
	void (*resume)(struct host1x_cdma *cdma, u32 getptr);
	void (*timeout_cpu_incr)(struct host1x_cdma *cdma, u32 getptr,
				 u32 syncpt_incrs, u32 syncval, u32 nr_slots);
};

struct host1x_pushbuffer_ops {
	void (*init)(struct push_buffer *pb);
};

struct host1x_debug_ops {
	void (*debug_init)(struct dentry *de);
	void (*show_channel_cdma)(struct host1x *host,
				  struct host1x_channel *ch,
				  struct output *o);
	void (*show_channel_fifo)(struct host1x *host,
				  struct host1x_channel *ch,
				  struct output *o);
	void (*show_mlocks)(struct host1x *host, struct output *output);

};

struct host1x_syncpt_ops {
	void (*restore)(struct host1x_syncpt *syncpt);
	void (*restore_wait_base)(struct host1x_syncpt *syncpt);
	void (*load_wait_base)(struct host1x_syncpt *syncpt);
	u32 (*load)(struct host1x_syncpt *syncpt);
	int (*cpu_incr)(struct host1x_syncpt *syncpt);
	void (*assign_to_channel)(struct host1x_syncpt *syncpt,
	                          struct host1x_channel *channel);
	void (*enable_protection)(struct host1x *host);
};

struct host1x_intr_ops {
	int (*init_host_sync)(struct host1x *host, u32 cpm,
		void (*syncpt_thresh_work)(struct work_struct *work));
	void (*set_syncpt_threshold)(
		struct host1x *host, unsigned int id, u32 thresh);
	void (*enable_syncpt_intr)(struct host1x *host, unsigned int id);
	void (*disable_syncpt_intr)(struct host1x *host, unsigned int id);
	void (*disable_all_syncpt_intrs)(struct host1x *host);
	int (*free_syncpt_irq)(struct host1x *host);
};

struct host1x_sid_entry {
	unsigned int base;
	unsigned int offset;
	unsigned int limit;
};

struct host1x_info {
	unsigned int nb_channels; /* host1x: number of channels supported */
	unsigned int nb_pts; /* host1x: number of syncpoints supported */
	unsigned int nb_bases; /* host1x: number of syncpoint bases supported */
	unsigned int nb_mlocks; /* host1x: number of mlocks supported */
	int (*init)(struct host1x *host1x); /* initialize per SoC ops */
	unsigned int sync_offset; /* offset of syncpoint registers */
	u64 dma_mask; /* mask of addressable memory */
	bool has_hypervisor; /* has hypervisor registers */
	unsigned int num_sid_entries;
	const struct host1x_sid_entry *sid_table;
};

struct host1x {
	const struct host1x_info *info;

	void __iomem *regs;
	void __iomem *hv_regs; /* hypervisor region */
	struct host1x_syncpt *syncpt;
	struct host1x_syncpt_base *bases;
	struct device *dev;
	struct clk *clk;
	struct reset_control *rst;

	struct iommu_group *group;
	struct iommu_domain *domain;
	struct iova_domain iova;
	dma_addr_t iova_end;

	struct mutex intr_mutex;
	int intr_syncpt_irq;

	const struct host1x_syncpt_ops *syncpt_op;
	const struct host1x_intr_ops *intr_op;
	const struct host1x_channel_ops *channel_op;
	const struct host1x_cdma_ops *cdma_op;
	const struct host1x_pushbuffer_ops *cdma_pb_op;
	const struct host1x_debug_ops *debug_op;

	struct host1x_syncpt *nop_sp;

	struct mutex syncpt_mutex;

	struct host1x_channel_list channel_list;

	struct dentry *debugfs;

	struct mutex devices_lock;
	struct list_head devices;

	struct list_head list;
};

void host1x_hypervisor_writel(struct host1x *host1x, u32 r, u32 v);
u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r);
void host1x_sync_writel(struct host1x *host1x, u32 r, u32 v);
u32 host1x_sync_readl(struct host1x *host1x, u32 r);
void host1x_ch_writel(struct host1x_channel *ch, u32 r, u32 v);
u32 host1x_ch_readl(struct host1x_channel *ch, u32 r);

static inline void host1x_hw_syncpt_restore(struct host1x *host,
					    struct host1x_syncpt *sp)
{
	host->syncpt_op->restore(sp);
}

static inline void host1x_hw_syncpt_restore_wait_base(struct host1x *host,
						      struct host1x_syncpt *sp)
{
	host->syncpt_op->restore_wait_base(sp);
}

static inline void host1x_hw_syncpt_load_wait_base(struct host1x *host,
						   struct host1x_syncpt *sp)
{
	host->syncpt_op->load_wait_base(sp);
}

static inline u32 host1x_hw_syncpt_load(struct host1x *host,
					struct host1x_syncpt *sp)
{
	return host->syncpt_op->load(sp);
}

static inline int host1x_hw_syncpt_cpu_incr(struct host1x *host,
					    struct host1x_syncpt *sp)
{
	return host->syncpt_op->cpu_incr(sp);
}

static inline void host1x_hw_syncpt_assign_to_channel(
	struct host1x *host, struct host1x_syncpt *sp,
	struct host1x_channel *ch)
{
	return host->syncpt_op->assign_to_channel(sp, ch);
}

static inline void host1x_hw_syncpt_enable_protection(struct host1x *host)
{
	return host->syncpt_op->enable_protection(host);
}

static inline int host1x_hw_intr_init_host_sync(struct host1x *host, u32 cpm,
			void (*syncpt_thresh_work)(struct work_struct *))
{
	return host->intr_op->init_host_sync(host, cpm, syncpt_thresh_work);
}

static inline void host1x_hw_intr_set_syncpt_threshold(struct host1x *host,
						       unsigned int id,
						       u32 thresh)
{
	host->intr_op->set_syncpt_threshold(host, id, thresh);
}

static inline void host1x_hw_intr_enable_syncpt_intr(struct host1x *host,
						     unsigned int id)
{
	host->intr_op->enable_syncpt_intr(host, id);
}

static inline void host1x_hw_intr_disable_syncpt_intr(struct host1x *host,
						      unsigned int id)
{
	host->intr_op->disable_syncpt_intr(host, id);
}

static inline void host1x_hw_intr_disable_all_syncpt_intrs(struct host1x *host)
{
	host->intr_op->disable_all_syncpt_intrs(host);
}

static inline int host1x_hw_intr_free_syncpt_irq(struct host1x *host)
{
	return host->intr_op->free_syncpt_irq(host);
}

static inline int host1x_hw_channel_init(struct host1x *host,
					 struct host1x_channel *channel,
					 unsigned int id)
{
	return host->channel_op->init(channel, host, id);
}

static inline int host1x_hw_channel_submit(struct host1x *host,
					   struct host1x_job *job)
{
	return host->channel_op->submit(job);
}

static inline void host1x_hw_cdma_start(struct host1x *host,
					struct host1x_cdma *cdma)
{
	host->cdma_op->start(cdma);
}

static inline void host1x_hw_cdma_stop(struct host1x *host,
				       struct host1x_cdma *cdma)
{
	host->cdma_op->stop(cdma);
}

static inline void host1x_hw_cdma_flush(struct host1x *host,
					struct host1x_cdma *cdma)
{
	host->cdma_op->flush(cdma);
}

static inline int host1x_hw_cdma_timeout_init(struct host1x *host,
					      struct host1x_cdma *cdma,
					      unsigned int syncpt)
{
	return host->cdma_op->timeout_init(cdma, syncpt);
}

static inline void host1x_hw_cdma_timeout_destroy(struct host1x *host,
						  struct host1x_cdma *cdma)
{
	host->cdma_op->timeout_destroy(cdma);
}

static inline void host1x_hw_cdma_freeze(struct host1x *host,
					 struct host1x_cdma *cdma)
{
	host->cdma_op->freeze(cdma);
}

static inline void host1x_hw_cdma_resume(struct host1x *host,
					 struct host1x_cdma *cdma, u32 getptr)
{
	host->cdma_op->resume(cdma, getptr);
}

static inline void host1x_hw_cdma_timeout_cpu_incr(struct host1x *host,
						   struct host1x_cdma *cdma,
						   u32 getptr,
						   u32 syncpt_incrs,
						   u32 syncval, u32 nr_slots)
{
	host->cdma_op->timeout_cpu_incr(cdma, getptr, syncpt_incrs, syncval,
					nr_slots);
}

static inline void host1x_hw_pushbuffer_init(struct host1x *host,
					     struct push_buffer *pb)
{
	host->cdma_pb_op->init(pb);
}

static inline void host1x_hw_debug_init(struct host1x *host, struct dentry *de)
{
	if (host->debug_op && host->debug_op->debug_init)
		host->debug_op->debug_init(de);
}

static inline void host1x_hw_show_channel_cdma(struct host1x *host,
					       struct host1x_channel *channel,
					       struct output *o)
{
	host->debug_op->show_channel_cdma(host, channel, o);
}

static inline void host1x_hw_show_channel_fifo(struct host1x *host,
					       struct host1x_channel *channel,
					       struct output *o)
{
	host->debug_op->show_channel_fifo(host, channel, o);
}

static inline void host1x_hw_show_mlocks(struct host1x *host, struct output *o)
{
	host->debug_op->show_mlocks(host, o);
}

extern struct platform_driver tegra_mipi_driver;

#endif