/*
 * Remote processor framework
 *
 * Copyright (C) 2011 Texas Instruments, Inc.
 * Copyright (C) 2011 Google, Inc.
 *
 * Ohad Ben-Cohen <ohad@wizery.com>
 * Brian Swetland <swetland@google.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 */

#ifndef REMOTEPROC_INTERNAL_H
#define REMOTEPROC_INTERNAL_H

#include <linux/irqreturn.h>
#include <linux/firmware.h>
#include <linux/module.h>

struct rproc;

/**
 * struct rproc_fw_ops - firmware format specific operations.
 * @find_rsc_table:	find the resource table inside the firmware image
 * @find_loaded_rsc_table: find the loaded resouce table
 * @load:		load firmeware to memory, where the remote processor
 *			expects to find it
 * @sanity_check:	sanity check the fw image
 * @get_boot_addr:	get boot address to entry point specified in firmware
 */
struct rproc_fw_ops {
	struct resource_table *(*find_rsc_table) (struct rproc *rproc,
						const struct firmware *fw,
						int *tablesz);
	struct resource_table *(*find_loaded_rsc_table)(struct rproc *rproc,
						const struct firmware *fw);
	int (*request_firmware)(const struct firmware **firmware_p,
				const char *name, struct device *device);
	int (*request_firmware_nowait)(struct module *module, bool uevent,
		   const char *name, struct device *device, gfp_t gfp, void *context,
		   void (*cont)(const struct firmware *fw, void *context));
	void (*release_firmware)(const struct firmware *fw);
	int (*load)(struct rproc *rproc, const struct firmware *fw);
	int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
	u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
};

/* from remoteproc_core.c */
void rproc_release(struct kref *kref);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);

/* from remoteproc_virtio.c */
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);
void rproc_remove_virtio_dev(struct rproc_vdev *rvdev);

/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
					struct rproc_mem_entry *trace);
void rproc_delete_debug_dir(struct rproc *rproc);
void rproc_create_debug_dir(struct rproc *rproc);
void rproc_init_debugfs(void);
void rproc_exit_debugfs(void);

void rproc_free_vring(struct rproc_vring *rvring);
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);

void *rproc_da_to_va(struct rproc *rproc, u64 da, int len);
int rproc_trigger_recovery(struct rproc *rproc);

static inline
int rproc_fw_request_firmware(struct rproc *rproc, const struct firmware **fw)
{
	if (rproc->fw_ops->request_firmware)
		return rproc->fw_ops->request_firmware(fw,
						       rproc->firmware,
						       &rproc->dev);

	return 0;
}

static inline
int rproc_fw_request_firmware_nowait(struct rproc *rproc,
		     void (*cont)(const struct firmware *fw, void *context))
{
	if (rproc->fw_ops->request_firmware_nowait) {
		return rproc->fw_ops->request_firmware_nowait(THIS_MODULE,
					  FW_ACTION_HOTPLUG, rproc->firmware,
					  &rproc->dev, GFP_KERNEL, rproc,
					  cont);
	}

	return 0;
}

static inline
void rproc_fw_release_firmware(struct rproc *rproc, const struct firmware *fw)
{
	if (rproc->fw_ops->release_firmware)
		rproc->fw_ops->release_firmware(fw);
}

static inline
int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
{
	if (rproc->fw_ops->sanity_check)
		return rproc->fw_ops->sanity_check(rproc, fw);

	return 0;
}

static inline
u32 rproc_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
{
	if (rproc->fw_ops->get_boot_addr)
		return rproc->fw_ops->get_boot_addr(rproc, fw);

	return 0;
}

static inline
int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
{
	if (rproc->fw_ops->load)
		return rproc->fw_ops->load(rproc, fw);

	return -EINVAL;
}

static inline
struct resource_table *rproc_find_rsc_table(struct rproc *rproc,
				const struct firmware *fw, int *tablesz)
{
	if (rproc->fw_ops->find_rsc_table)
		return rproc->fw_ops->find_rsc_table(rproc, fw, tablesz);

	return NULL;
}

static inline
struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
                                const struct firmware *fw)
{
	if (rproc->fw_ops->find_loaded_rsc_table)
		return rproc->fw_ops->find_loaded_rsc_table(rproc, fw);

        return NULL;
}

extern const struct rproc_fw_ops rproc_elf_fw_ops;

#endif /* REMOTEPROC_INTERNAL_H */