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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: fpcir_intx.c
* Date: 2022-02-10 14:55:11
* LastEditTime: 2022-02-18 08:59:42
* Description: This files is for
*
* Modify History:
* Ver Who Date Changes
* ----- ------ -------- --------------------------------------
*/
/***************************** Include Files *********************************/
#include "fpcie.h"
#include "fpcie_common.h"
#include "fpcie_hw.h"
#include "fparameters.h"
#include "fdebug.h"
/***************** Macros (Inline Functions) Definitions *********************/
#define FPCIE_INTX_DEBUG_TAG "FPCIE_INTX"
#define FPCIE_INTX_ERROR(format, ...) FT_DEBUG_PRINT_E(FPCIE_INTX_DEBUG_TAG, format, ##__VA_ARGS__)
#define FPCIE_INTX_DEBUG_I(format, ...) FT_DEBUG_PRINT_I(FPCIE_INTX_DEBUG_TAG, format, ##__VA_ARGS__)
#define FPCIE_INTX_DEBUG_W(format, ...) FT_DEBUG_PRINT_W(FPCIE_INTX_DEBUG_TAG, format, ##__VA_ARGS__)
#define FPCIE_INTX_DEBUG_E(format, ...) FT_DEBUG_PRINT_E(FPCIE_INTX_DEBUG_TAG, format, ##__VA_ARGS__)
/************************** Constant Definitions *****************************/
#define INTA 0
#define INTB 1
#define INTC 2
#define INTD 3
/**************************** Type Definitions *******************************/
/************************** Variable Definitions *****************************/
/************************** Function Prototypes ******************************/
/**
* @name: FPcieIntxRegiterIrqHandler
* @msg: Use bus, device, and function to register interrupt response functions with INTX
* @param {FPcie *} instance_p is a pointer to the FPcie instance.
* @param {u32} bus is the number of the bus on which you want to register the funtion
* @param {u32} device is the number of the device on which you want to register the funtion
* @param {u32} function is the number of the function on which you want to register the funtion
* @param {FPcieIntxFun *} intx_fun_p is the pointer the user uses to register the callback function
* @return {FError}
*/
FError FPcieIntxRegiterIrqHandler(FPcie *instance_p,
u32 bdf,
FPcieIntxFun *intx_fun_p)
{
int i;
u8 interrupt_pin, interrupt_line;
u8 header_type;
FASSERT(instance_p != NULL);
FASSERT(instance_p->is_ready == FT_COMPONENT_IS_READY);
/* 通过ecm 直接访问 控制寄存器 */
FPcieEcamReadConfig8bit(instance_p->config.ecam, bdf, FPCIE_HEADER_TYPE_REG, &header_type) ;
if (header_type == 0)
{
for (i = 0; i < instance_p->scaned_bdf_count; i++)
{
if (instance_p->scaned_bdf_array[i] == (s32)bdf)
{
break; //获取到i的值，直接跳出循环
}
}
/* 读出 Interrupt Pin*/
FPcieEcamReadConfig8bit(instance_p->config.ecam, bdf, FPCIE_INTERRUPT_PIN_REG, &interrupt_pin) ;
switch (interrupt_pin)
{
case 0x1: /* INTA# */
interrupt_line = instance_p->config.inta_irq_num ;
instance_p->inta_fun[i] = *intx_fun_p; //中断函数，写入的是pcie instance的成员，一个pcie rc只有一个中断处理函数？
instance_p->inta_fun[i].bdf = bdf; //一个中断函数对应一个bdf号
break ;
case 0x2: /* INTB# */
interrupt_line = instance_p->config.intb_irq_num ;
instance_p->intb_fun[i] = *intx_fun_p;
instance_p->intb_fun[i].bdf = bdf;
break ;
case 0x3: /* INTC# */
interrupt_line = instance_p->config.intc_irq_num ;
instance_p->intc_fun[i] = *intx_fun_p;
instance_p->intc_fun[i].bdf = bdf;
break ;
case 0x4: /* INTD# */
interrupt_line = instance_p->config.intd_irq_num ;
instance_p->intd_fun[i] = *intx_fun_p;
instance_p->intd_fun[i].bdf = bdf;
break ;
default:
FPCIE_INTX_DEBUG_E("Error interrupt pin") ;
return FPCIE_NOT_FOUND;
}
FPcieEcamWriteConfig8bit(instance_p->config.ecam, bdf, FPCIE_INTERRUPT_LINE_REG, interrupt_line) ;
}
else
{
FPCIE_INTX_DEBUG_E("Pcie intx not match header type") ;
return FPCIE_NOT_FOUND;
}
return FT_SUCCESS;
}
static void FPcieIntxCallback(FPcie *instance_p, u8 INTx_NUM)
{
int i;
u16 status ;
/* 读取对应bdf 的status */
for (i = 0; i < instance_p->scaned_bdf_count; i++) //轮询所有扫描到的pcie节点的interrupt status
{
FPcieEcamReadConfig16bit(instance_p->config.ecam, instance_p->scaned_bdf_array[i], FPCIE_STATUS_REG, &status) ;
if (status & 0x8) /* check intrrupt status */
{
switch (INTx_NUM)
{
case INTA:
instance_p->inta_fun[i].IntxCallBack(instance_p->inta_fun[i].args);
break;
case INTB:
instance_p->intb_fun[i].IntxCallBack(instance_p->intb_fun[i].args);
break;
case INTC:
instance_p->intc_fun[i].IntxCallBack(instance_p->intc_fun[i].args);
break;
case INTD:
instance_p->intd_fun[i].IntxCallBack(instance_p->intd_fun[i].args);
break;
default:
printf("%s: error intx num\n", __func__);
break;
}
}
}
}
static void FPcieIntxIrqEoi(FPcie *instance_p, u32 intx_idx)
{
#ifdef FT_PCI_INTX_EOI
u32 status = 0 ;
u32 istatus = 0, imask = 0 ;
int i ;
status = FPCIE_READREG(instance_p->config.intx_peux_stat_address[0], 0) + (FPCIE_READREG(instance_p->config.intx_peux_stat_address[1], 0) << 12);
imask = 1 << (3 - intx_idx);
istatus = (1 << intx_idx) << 24;
for (i = 0; i < FT_PCI_INTX_CONTROL_NUM; i++, status >>= 4)
{
if (imask & status)
{
FPCIE_WRITEREG(instance_p->config.intx_control_eux_cx_address[i], 0, istatus) ;
}
}
#else
(void) instance_p;
(void) intx_idx ;
#endif
return ;
}
/**
* @name: FPcieIntxIrqHandler
* @msg: Intx interrupt service function of pcie
* @param {s32} vector is interrupt vector number
* @param {void} *args is Pass in a pointer to be processed
*/
void FPcieIntxIrqHandler(s32 vector, void *args) //中断响应函数
{
FPcie *instance_p = (FPcie *)args;
FASSERT(instance_p != NULL);
u32 *reg_data = 0;
switch (vector)
{
case FT_PCI_INTA_IRQ_NUM: //如果响应的是INTA中断，则调用pcie_obj中INTA的中断处理函数
FPcieIntxCallback(instance_p, INTA) ;
FPcieIntxIrqEoi(instance_p, 0) ;
break;
case FT_PCI_INTB_IRQ_NUM:
FPcieIntxCallback(instance_p, INTA) ;
FPcieIntxIrqEoi(instance_p, 1) ;
break;
case FT_PCI_INTC_IRQ_NUM:
FPcieIntxCallback(instance_p, INTA) ;
FPcieIntxIrqEoi(instance_p, 2) ;
break;
case FT_PCI_INTD_IRQ_NUM:
FPcieIntxCallback(instance_p, INTA) ;
FPcieIntxIrqEoi(instance_p, 3) ;
break;
default:
break;
}
}
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