drivers/net/ethernet/huawei/hinic/hinic_hw_io.h

/*
 * Huawei HiNIC PCI Express Linux driver
 * Copyright(c) 2017 Huawei Technologies Co., Ltd
 *
 * 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.
 *
 */

#ifndef HINIC_HW_IO_H
#define HINIC_HW_IO_H

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/semaphore.h>
#include <linux/sizes.h>

#include "hinic_hw_if.h"
#include "hinic_hw_eqs.h"
#include "hinic_hw_wq.h"
#include "hinic_hw_cmdq.h"
#include "hinic_hw_qp.h"

#define HINIC_DB_PAGE_SIZE      SZ_4K
#define HINIC_DB_SIZE           SZ_4M

#define HINIC_DB_MAX_AREAS      (HINIC_DB_SIZE / HINIC_DB_PAGE_SIZE)

enum hinic_db_type {
	HINIC_DB_CMDQ_TYPE,
	HINIC_DB_SQ_TYPE,
};

enum hinic_io_path {
	HINIC_CTRL_PATH,
	HINIC_DATA_PATH,
};

struct hinic_free_db_area {
	int             db_idx[HINIC_DB_MAX_AREAS];

	int             alloc_pos;
	int             return_pos;

	int             num_free;

	/* Lock for getting db area */
	struct semaphore        idx_lock;
};

struct hinic_func_to_io {
	struct hinic_hwif       *hwif;

	struct hinic_ceqs       ceqs;

	struct hinic_wqs        wqs;

	struct hinic_wq         *sq_wq;
	struct hinic_wq         *rq_wq;

	struct hinic_qp         *qps;
	u16                     max_qps;

	void __iomem            **sq_db;
	void __iomem            *db_base;

	void                    *ci_addr_base;
	dma_addr_t              ci_dma_base;

	struct hinic_free_db_area       free_db_area;

	void __iomem                    *cmdq_db_area[HINIC_MAX_CMDQ_TYPES];

	struct hinic_cmdqs              cmdqs;
};

int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
			u16 base_qpn, int num_qps,
			struct msix_entry *sq_msix_entries,
			struct msix_entry *rq_msix_entries);

void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io,
			  int num_qps);

int hinic_io_init(struct hinic_func_to_io *func_to_io,
		  struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
		  struct msix_entry *ceq_msix_entries);

void hinic_io_free(struct hinic_func_to_io *func_to_io);

#endif