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/*
* Copyright : (C) 2022 Phytium Information Technology, Inc.
* All Rights Reserved.
*
* This program is OPEN SOURCE software: you can redistribute it and/or modify it
* under the terms of the Phytium Public License as published by the Phytium Technology Co.,Ltd,
* either version 1.0 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 Phytium Public License for more details.
*
*
* FilePath: fpcie_hw.c
* Date: 2022-02-10 14:55:11
* LastEditTime: 2022-02-18 08:58:12
* Description: This files is for
*
* Modify History:
* Ver Who Date Changes
* ----- ------ -------- --------------------------------------
*/
#include "fpcie_hw.h"
#include "fpcie.h"
#include "fpcie_common.h"
#include "fparameters.h"
/***************************** Include Files *********************************/
/************************** Constant Definitions *****************************/
/* Access sizes for PCI reads and writes */
enum FPcieSize
{
FPCIE_SIZE_8,
FPCIE_SIZE_16,
FPCIE_SIZE_32,
};
/**************************** Type Definitions *******************************/
/************************** Variable Definitions *****************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
/**
* @name: FPcieEcamConfigAddress
* @msg: 提供一个可用于ECAM 访问机制的地址
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {void **} addrp 用于存放输出有效访问空间的地址
* @return FError
*/
static FError FPcieEcamConfigAddress(uintptr addr, s32 bdf, u32 offset, void **addrp)
{
u32 bus_no = FPCIE_BUS(bdf);
u32 dev_no = FPCIE_DEV(bdf);
u32 vendor = 0;
s32 bdf_parent ;
uintptr ecam_addr = addr;
addr += FPCIE_BUS(bdf) << 20;
addr += FPCIE_DEV(bdf) << 15;
addr += FPCIE_FUNC(bdf) << 12;
bdf_parent = FPCIE_BDF(bus_no - 1, 0, 0);
vendor = FPCIE_READREG(addr, FPCIE_CFG_ID_REG) ;
if ((bus_no > 0) && (dev_no > 0))
{
if ((FPCIE_READREG_BYTE(addr, FPCIE_HEADER_TYPE_REG) & 0x7f) != FPCIE_HEADER_TYPE_BRIDGE)
{
if (vendor != 0x1d17)
{
return FPCIE_NEED_SKIP;
}
if (FPcieSkipDevice(ecam_addr, bdf_parent))
{
return FPCIE_NEED_SKIP;
}
}
}
addr += offset ;
*addrp = (void *)addr ;
return FT_SUCCESS;
}
/**
* @name: FPcieSkipDevice
* @msg: 跳过部分无效设备
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @return FError
*/
FError FPcieSkipDevice(uintptr ecam_addr, s32 bdf)
{
u8 pos, id;
u16 capreg;
u8 port_type;
uintptr addr ;
addr = ecam_addr ;
addr += FPCIE_BUS(bdf) << 20;
addr += FPCIE_DEV(bdf) << 15;
addr += FPCIE_FUNC(bdf) << 12;
pos = 0x34 ; /* Capabilites Pointer */
while (1)
{
pos = FPCIE_READREG_BYTE(addr, pos) ;
if (pos < 0x40)/* 超过Capability Pointer所代表的空间offset最大范围 */
break;
pos &= ~3 ; /* offset 第两位对齐 */
id = FPCIE_READREG_BYTE(addr, pos) ; /* PCI Express Cap ID */
if (id == 0xff)
{
break ;
}
if (id == 0x10) /* 找到 PCIe设备的cap structure */
{
capreg = FPCIE_READREG(addr, pos + 2) ;
port_type = (capreg >> 4) & 0xf ; /* Device/Port type */
if ((port_type == 0x5) && (FPCIE_DEV(bdf) != 0))
{
return FPCIE_NEED_SKIP ;
}
else
{
return FT_SUCCESS;
}
}
pos + 1 ;
}
return FT_SUCCESS;
}
static s32 FPcieGetFf(enum FPcieSize size)
{
switch (size)
{
case FPCIE_SIZE_8:
return 0xff;
case FPCIE_SIZE_16:
return 0xffff;
default:
return 0xffffffff;
}
}
/**
* @name: FPcieEcamReadConfig8bit
* @msg: 基于ECAM机制读取配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u8} *value_p pointer store date available in the offset
* @return FError
*/
void FPcieEcamReadConfig8bit(uintptr ecam_addr, s32 bdf, u32 offset, u8 *value_p)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
*value_p = FPcieGetFf(FPCIE_SIZE_8) ;
return ;
}
*value_p = FPCIE_READREG_BYTE(addr, 0);
return ;
}
/**
* @name: FPcieEcamReadConfig16bit
* @msg: 基于ECAM机制读取配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u16} *value_p pointer store date available in the offset
* @return FError
*/
void FPcieEcamReadConfig16bit(uintptr ecam_addr, s32 bdf, u32 offset, u16 *value_p)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
*value_p = FPcieGetFf(FPCIE_SIZE_16) ;
return ;
}
*value_p = FPCIE_READREG_SHORT(addr, 0);
return ;
}
/**
* @name: FPcieEcamReadConfig32bit
* @msg: 基于ECAM机制读取配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u32} *value_p pointer store date available in the offset
* @return FError
*/
void FPcieEcamReadConfig32bit(uintptr ecam_addr, s32 bdf, u32 offset, u32 *value_p)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
*value_p = FPcieGetFf(FPCIE_SIZE_32) ;
return ;
}
*value_p = FPCIE_READREG(addr, 0);
return ;
}
/**
* @name: FPcieEcamWriteConfig8bit
* @msg: 基于ECAM机制写入配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u8} value to be written on to the offset
* @return FError
*/
void FPcieEcamWriteConfig8bit(uintptr ecam_addr, s32 bdf, u32 offset, u8 value)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
return ;
}
FPCIE_WRITEREG_BYTE(addr, 0, value) ;
return ;
}
/**
* @name: FPcieEcamWriteConfig16bit
* @msg: 基于ECAM机制写入配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u16} value to be written on to the offset
* @return FError
*/
void FPcieEcamWriteConfig16bit(uintptr ecam_addr, s32 bdf, u32 offset, u16 value)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
return ;
}
FPCIE_WRITEREG_SHORT(addr, 0, value) ;
return ;
}
/**
* @name: FPcieEcamWriteConfig32bit
* @msg: 基于ECAM机制写入配置空间中偏移量的值
* @param {FPcie} *instance_p is a pointer to the FPcie instance.
* @param {s32} bdf {Bus Device function}
* @param {u32} offset 配置空间中的偏移量
* @param {u32} value to be written on to the offset
* @return FError
*/
void FPcieEcamWriteConfig32bit(uintptr ecam_addr, s32 bdf, u32 offset, u32 value)
{
uintptr addr ;
if (FPcieEcamConfigAddress(ecam_addr, bdf, offset, (void *)&addr) != FT_SUCCESS)
{
return ;
}
FPCIE_WRITEREG(addr, 0, value) ;
return ;
}
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