/*
 * 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_IF_H
#define HINIC_HW_IF_H

#include <linux/pci.h>
#include <linux/io.h>
#include <linux/types.h>
#include <asm/byteorder.h>

#define HINIC_DMA_ATTR_ST_SHIFT                                 0
#define HINIC_DMA_ATTR_AT_SHIFT                                 8
#define HINIC_DMA_ATTR_PH_SHIFT                                 10
#define HINIC_DMA_ATTR_NO_SNOOPING_SHIFT                        12
#define HINIC_DMA_ATTR_TPH_EN_SHIFT                             13

#define HINIC_DMA_ATTR_ST_MASK                                  0xFF
#define HINIC_DMA_ATTR_AT_MASK                                  0x3
#define HINIC_DMA_ATTR_PH_MASK                                  0x3
#define HINIC_DMA_ATTR_NO_SNOOPING_MASK                         0x1
#define HINIC_DMA_ATTR_TPH_EN_MASK                              0x1

#define HINIC_DMA_ATTR_SET(val, member)                         \
	(((u32)(val) & HINIC_DMA_ATTR_##member##_MASK) <<       \
	 HINIC_DMA_ATTR_##member##_SHIFT)

#define HINIC_DMA_ATTR_CLEAR(val, member)                       \
	((val) & (~(HINIC_DMA_ATTR_##member##_MASK              \
	 << HINIC_DMA_ATTR_##member##_SHIFT)))

#define HINIC_FA0_FUNC_IDX_SHIFT                                0
#define HINIC_FA0_PF_IDX_SHIFT                                  10
#define HINIC_FA0_PCI_INTF_IDX_SHIFT                            14
/* reserved members - off 16 */
#define HINIC_FA0_FUNC_TYPE_SHIFT                               24

#define HINIC_FA0_FUNC_IDX_MASK                                 0x3FF
#define HINIC_FA0_PF_IDX_MASK                                   0xF
#define HINIC_FA0_PCI_INTF_IDX_MASK                             0x3
#define HINIC_FA0_FUNC_TYPE_MASK                                0x1

#define HINIC_FA0_GET(val, member)                              \
	(((val) >> HINIC_FA0_##member##_SHIFT) & HINIC_FA0_##member##_MASK)

#define HINIC_FA1_AEQS_PER_FUNC_SHIFT                           8
/* reserved members - off 10 */
#define HINIC_FA1_CEQS_PER_FUNC_SHIFT                           12
/* reserved members - off 15 */
#define HINIC_FA1_IRQS_PER_FUNC_SHIFT                           20
#define HINIC_FA1_DMA_ATTR_PER_FUNC_SHIFT                       24
/* reserved members - off 27 */
#define HINIC_FA1_INIT_STATUS_SHIFT                             30

#define HINIC_FA1_AEQS_PER_FUNC_MASK                            0x3
#define HINIC_FA1_CEQS_PER_FUNC_MASK                            0x7
#define HINIC_FA1_IRQS_PER_FUNC_MASK                            0xF
#define HINIC_FA1_DMA_ATTR_PER_FUNC_MASK                        0x7
#define HINIC_FA1_INIT_STATUS_MASK                              0x1

#define HINIC_FA1_GET(val, member)                              \
	(((val) >> HINIC_FA1_##member##_SHIFT) & HINIC_FA1_##member##_MASK)

#define HINIC_PPF_ELECTION_IDX_SHIFT                            0
#define HINIC_PPF_ELECTION_IDX_MASK                             0x1F

#define HINIC_PPF_ELECTION_SET(val, member)                     \
	(((u32)(val) & HINIC_PPF_ELECTION_##member##_MASK) <<   \
	 HINIC_PPF_ELECTION_##member##_SHIFT)

#define HINIC_PPF_ELECTION_GET(val, member)                     \
	(((val) >> HINIC_PPF_ELECTION_##member##_SHIFT) &       \
	 HINIC_PPF_ELECTION_##member##_MASK)

#define HINIC_PPF_ELECTION_CLEAR(val, member)                   \
	((val) & (~(HINIC_PPF_ELECTION_##member##_MASK          \
	 << HINIC_PPF_ELECTION_##member##_SHIFT)))

#define HINIC_HWIF_NUM_AEQS(hwif)       ((hwif)->attr.num_aeqs)
#define HINIC_HWIF_NUM_CEQS(hwif)       ((hwif)->attr.num_ceqs)
#define HINIC_HWIF_NUM_IRQS(hwif)       ((hwif)->attr.num_irqs)
#define HINIC_HWIF_FUNC_IDX(hwif)       ((hwif)->attr.func_idx)
#define HINIC_HWIF_PCI_INTF(hwif)       ((hwif)->attr.pci_intf_idx)

#define HINIC_FUNC_TYPE(hwif)           ((hwif)->attr.func_type)
#define HINIC_IS_PF(hwif)               (HINIC_FUNC_TYPE(hwif) == HINIC_PF)
#define HINIC_IS_PPF(hwif)              (HINIC_FUNC_TYPE(hwif) == HINIC_PPF)

#define HINIC_PCI_CFG_REGS_BAR          0

#define HINIC_PCIE_ST_DISABLE           0
#define HINIC_PCIE_AT_DISABLE           0
#define HINIC_PCIE_PH_DISABLE           0

enum hinic_pcie_nosnoop {
	HINIC_PCIE_SNOOP        = 0,
	HINIC_PCIE_NO_SNOOP     = 1,
};

enum hinic_pcie_tph {
	HINIC_PCIE_TPH_DISABLE  = 0,
	HINIC_PCIE_TPH_ENABLE   = 1,
};

enum hinic_func_type {
	HINIC_PF        = 0,
	HINIC_PPF       = 2,
};

struct hinic_func_attr {
	u16                     func_idx;
	u8                      pf_idx;
	u8                      pci_intf_idx;

	enum hinic_func_type    func_type;

	u8                      ppf_idx;

	u16                     num_irqs;
	u8                      num_aeqs;
	u8                      num_ceqs;

	u8                      num_dma_attr;
};

struct hinic_hwif {
	struct pci_dev          *pdev;
	void __iomem            *cfg_regs_bar;

	struct hinic_func_attr  attr;
};

static inline u32 hinic_hwif_read_reg(struct hinic_hwif *hwif, u32 reg)
{
	return be32_to_cpu(readl(hwif->cfg_regs_bar + reg));
}

static inline void hinic_hwif_write_reg(struct hinic_hwif *hwif, u32 reg,
					u32 val)
{
	writel(cpu_to_be32(val), hwif->cfg_regs_bar + reg);
}

int hinic_init_hwif(struct hinic_hwif *hwif, struct pci_dev *pdev);

void hinic_free_hwif(struct hinic_hwif *hwif);

#endif