1、驱动链接

XDMA驱动源码官网下载地址为：https://github.com/Xilinx/dma_ip_drivers
下载最新版本的XDMA驱动源码，即master版本，否则其驱动用不了（xdma ip核版本为4.1）。

2、驱动

此部分来源于博客：xdma驱动编译（给arm使用）

2.1、修改驱动的Makefile

修改dma_ip_drivers-master/XDMA/linux-kernel/xdma/Makefile

# ifneq ($(KERNELRELEASE),)
# 	$(TARGET_MODULE)-objs := libxdma.o xdma_cdev.o cdev_ctrl.o cdev_events.o cdev_sgdma.o cdev_xvc.o cdev_bypass.o xdma_mod.o xdma_thread.o
# 	obj-m := $(TARGET_MODULE).o
# else
# 	BUILDSYSTEM_DIR:=/lib/modules/$(shell uname -r)/build
# 	PWD:=$(shell pwd)
 
找到上面的并注释掉（最后一行还有一个 endif 也注释掉），紧挨着就添加下面的：
 
$(TARGET_MODULE)-objs := libxdma.o xdma_cdev.o cdev_ctrl.o cdev_events.o cdev_sgdma.o cdev_xvc.o cdev_bypass.o xdma_mod.o xdma_thread.o
obj-m := $(TARGET_MODULE).o
BUILDSYSTEM_DIR:=/home/debian/Desktop/xiaguangbo/project/rk3588/project/kernel # linux 源码目录
PWD:=$(shell pwd)

2.2、编译

export ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-
make

3、测试工具

3.1、修改测试工具Makefile

修改 dma_ip_drivers-master/XDMA/linux-kernel/tools/Makefile

# CC ?= gcc
CC = aarch64-linux-gnu-gcc

3.2、编译

make

编译之后用file xxx查看文件是否是属于aarch64架构的，如果不是查看Makefile对不对

4、xdma中断检测上位机

4.1、代码

#include <assert.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <pthread.h>  
#include <semaphore.h>
#include <stdarg.h>
#include <syslog.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/sysinfo.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>
/* ltoh: little to host */
/* htol: big to host */
#if __BYTE_ORDER == __LITTLE_ENDIAN
#  define ltohl(x)       (x)
#  define ltohs(x)       (x)
#  define htoll(x)       (x)
#  define htols(x)       (x)
#elif __BYTE_ORDER == __BIG_ENDIAN
#  define ltohl(x)     __bswap_32(x)
#  define ltohs(x)     __bswap_16(x)
#  define htoll(x)     __bswap_32(x)
#  define htols(x)     __bswap_16(x)
#endif
#define MAP_SIZE (1024*1024UL)
#define MAP_MASK (MAP_SIZE - 1)

static void * user_base;
static int start_en;
unsigned int  user_irq_ack;

static void *mmap_control(int fd,long mapsize)
{
	void *vir_addr;
	vir_addr = mmap(0, mapsize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
	return vir_addr;
}

static void user_write(unsigned int address,unsigned int val)
{
    unsigned int writeval = htoll(val);
    *((unsigned int *)(user_base+address)) = writeval;
}

static unsigned int user_read(unsigned int address)
{
    unsigned int read_result = *((unsigned int *)(user_base+address));
    read_result = ltohl(read_result);
    return read_result;
}

void *event0_process()
{
	int val;
	int h_event0;
    	h_event0 = open("/dev/xdma0_events_0", O_RDWR | O_SYNC);
    	if(h_event0 < 0) 
	{ 
		printf("open event0 error\n");
	}
	else
	{
	printf("open event0\n");
	while (1)
		{
			if (start_en) {
			read(h_event0,&val,4);
			if (val == 1)
				printf("event_0 done!\n");
			else
				printf("event_0 timeout!\n");
			}
			usleep(1);
		}
	close(h_event0);
	}
}

void *event1_process()
{
	int val;
	int h_event1;
    	h_event1 = open("/dev/xdma0_events_1", O_RDWR | O_SYNC);
    	if(h_event1 < 0) 
	{ 
		printf("open event1 error\n");
	}
	else
	{
	printf("open event1\n");
	while (1)
		{
			if (start_en) {
			read(h_event1,&val,4);
			if (val == 1)
				printf("event_1 done!\n");
			else
				printf("event_1 timeout!\n");
			}
			usleep(1);
		}
	close(h_event1);
	}
}

void *event2_process()
{
	int val;
	int h_event2;
    	h_event2 = open("/dev/xdma0_events_2", O_RDWR | O_SYNC);
    	if(h_event2 < 0) 
	{ 
		printf("open event2 error\n");
	}
	else
	{
	printf("open event2\n");
	while (1)
		{
			if (start_en) {
			read(h_event2,&val,4);
			if (val == 1)
				printf("event_2 done!\n");
			else
				printf("event_2 timeout!\n");
			}
			usleep(1);
	}
	close(h_event2);
	}
}

void *event3_process()
{
	int val;
	int h_event3;
    	h_event3 = open("/dev/xdma0_events_3", O_RDWR | O_SYNC);
    	if(h_event3 < 0) 
	{ 
		printf("open event3 error\n");
	}
	else
	{
	printf("open event3\n");
	while (1)
		{
			if (start_en) {
			read(h_event3,&val,4);
			if (val == 1)
				printf("event_3 done!\n");
			else
				printf("event_3 timeout!\n");
			}
			usleep(1);
		}
	close(h_event3);
	}
}

int main(int argc, char* argv[])
{

    	static int h_c2h0;
    	static int h_h2c0;
    	static int h_user;
    	pthread_t t_event0; 
    	pthread_t t_event1;
    	pthread_t t_event2;
    	pthread_t t_event3;

    	char* user_name = "/dev/xdma0_user";
    	char* c2h0_name = "/dev/xdma0_c2h_0";
    	char* h2c0_name = "/dev/xdma0_h2c_0";

	start_en = 0;

    	h_c2h0 = open(c2h0_name,O_RDWR | O_NONBLOCK);
    	if(h_c2h0 < 0) { printf("open c2h0 error\n");  };

    	h_h2c0 = open(h2c0_name,O_RDWR);
    	if(h_h2c0 < 0) { printf("open h2c0 error\n");  };

    	h_user = open(user_name, O_RDWR | O_SYNC);
    	if(h_user < 0) { printf("open user error\n");  };

    	user_base = mmap_control(h_user,MAP_SIZE);
	user_write(0x00000, 0xf);
  	pthread_create(&t_event0, NULL, event0_process, NULL);
	pthread_create(&t_event1, NULL, event1_process, NULL);
	pthread_create(&t_event2, NULL, event2_process, NULL);
	pthread_create(&t_event3, NULL, event3_process, NULL);

	usleep(100);
	user_irq_ack = 0xffff0000;
	user_write(0x00004, user_irq_ack);//start irq
	start_en = 1;
	printf("start\n");

	pthread_join(t_event0,NULL);
	pthread_join(t_event1,NULL);
	pthread_join(t_event2,NULL);
	pthread_join(t_event3,NULL);

	user_irq_ack = 0x00000000;
	user_write(0x00004, user_irq_ack);//stop irq

	close(h_c2h0);
	close(h_h2c0);
	close(h_user);
	close(t_event0);
	close(t_event1);
	close(t_event2);
	close(t_event3);

}

4.2编译中断测试程序

aarch64-linux-gnu-gcc pcie_irq.c -o pcie_irq -static -lpthread