zynq nvme实现
时间: 2023-11-12 13:57:42 浏览: 354
Zynq是一款Xilinx公司的SoC芯片,它集成了ARM处理器和FPGA,可以用于高性能计算、嵌入式系统等领域。NVMe是一种高性能、低延迟的存储协议,可以用于SSD等设备。在Zynq上实现NVMe需要使用FPGA实现NVMe控制器,然后通过ARM处理器与NVMe设备进行通信。
具体实现步骤如下:
. 实现NVMe控制器的FPGA逻辑,包括PCIe接口、命令解析、队列管理等。
2. 在ARM处理器上编写驱动程序,通过PCIe总线与FPGA通信,并实现NVMe协议的命令和数据传输。
3. 在Linux系统中加载驱动程序,使得NVMe设备可以被识别并使用。
相关问题
有zynq NVMe例程吗
是的,有Zynq NVMe例程。以下是一个基本的Zynq NVMe例程,该例程使用Zynq的PCIe接口连接到NVMe设备:
```c
#include <stdlib.h>
#include <stdio.h>
#include <xil_printf.h>
#include <xil_io.h>
#define NVME_BAR0_ADDR 0x10000000
#define NVME_BAR1_ADDR 0x10100000
#define NVME_CAP 0x00
#define NVME_VS 0x08
#define NVME_INTMS 0x0C
#define NVME_INTMC 0x10
#define NVME_CC 0x14
#define NVME_CSTS 0x1C
#define NVME_AQA 0x24
#define NVME_ASQ 0x28
#define NVME_ACQ 0x30
void nvme_write_reg(u32 reg_addr, u32 value) {
Xil_Out32(NVME_BAR0_ADDR + reg_addr, value);
}
u32 nvme_read_reg(u32 reg_addr) {
return Xil_In32(NVME_BAR0_ADDR + reg_addr);
}
int main() {
// Reset the NVMe controller
nvme_write_reg(NVME_CC, 0x00000001);
while (nvme_read_reg(NVME_CSTS) & 0x00000001);
// Configure the NVMe controller
nvme_write_reg(NVME_CAP, 0x00000000);
nvme_write_reg(NVME_VS, 0x00010000);
nvme_write_reg(NVME_INTMS, 0x00000000);
nvme_write_reg(NVME_INTMC, 0xFFFFFFFF);
nvme_write_reg(NVME_AQA, 0x00000000);
nvme_write_reg(NVME_ASQ, NVME_BAR1_ADDR);
nvme_write_reg(NVME_ACQ, NVME_BAR1_ADDR + 0x1000);
nvme_write_reg(NVME_CC, 0x00000007);
// Wait for the NVMe controller to be ready
while ((nvme_read_reg(NVME_CSTS) & 0x00000001) == 0);
// Issue a Identify Controller command
nvme_write_reg(NVME_ASQ + 0x00, 0x00000006);
nvme_write_reg(NVME_ASQ + 0x04, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x08, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x0C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x10, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x14, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x18, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x1C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x20, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x24, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x28, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x2C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x30, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x34, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x38, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x3C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x40, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x44, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x48, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x4C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x50, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x54, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x58, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x5C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x60, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x64, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x68, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x6C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x70, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x74, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x78, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x7C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x80, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x84, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x88, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x8C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x90, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x94, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x98, 0x00000000);
nvme_write_reg(NVME_ASQ + 0x9C, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xA0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xA4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xA8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xAC, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xB0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xB4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xB8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xBC, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xC0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xC4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xC8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xCC, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xD0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xD4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xD8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xDC, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xE0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xE4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xE8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xEC, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xF0, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xF4, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xF8, 0x00000000);
nvme_write_reg(NVME_ASQ + 0xFC, 0x00000001);
// Wait for the command to complete
while ((nvme_read_reg(NVME_CSTS) & 0x00000002) == 0);
// Read the Identify Controller data
u32 *identify_controller_data = (u32 *)(NVME_BAR1_ADDR + 0x1000);
for (int i = 0; i < 16; i++) {
xil_printf("Identify Controller data[%d]: 0x%08X\n", i, identify_controller_data[i]);
}
return 0;
}
```
该例程首先重置NVMe控制器,然后配置控制器并等待其准备好。然后,该例程发出一个Identify Controller命令,读取Identify Controller数据,并打印该数据。请注意,此示例代码仅用于参考,需要根据实际情况进行修改。
Zynq NVMe控制器访问DDR 代码
以下是一个简单的Zynq NVMe控制器访问DDR的代码示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <xil_types.h>
#include <xil_printf.h>
#include <xparameters.h>
#include <xscugic.h>
#include <xil_exception.h>
#include "xil_cache.h"
// NVMe 命令缓冲区地址
#define NVME_CMD_BUF_ADDR 0x10000000
// NVMe 数据缓冲区地址
#define NVME_DATA_BUF_ADDR 0x20000000
// DDR 起始地址
#define DDR_BASE_ADDR 0x80000000
// DDR 大小
#define DDR_SIZE 0x40000000
// 初始化 NVMe 控制器
void nvme_init() {
// TODO: 初始化 NVMe 控制器
}
// 向 NVMe 控制器发送命令
void nvme_send_cmd(u32 cmd_addr) {
// TODO: 向 NVMe 控制器发送命令
}
// 从 NVMe 控制器读取数据
void nvme_read_data(u32 data_addr, u32 size) {
// TODO: 从 NVMe 控制器读取数据
}
// 将数据写入 DDR
void write_to_ddr(u32 ddr_addr, u32 data_addr, u32 size) {
// 使能 L1 和 L2 缓存
Xil_DCacheFlushRange(data_addr, size);
// 写入 DDR
memcpy((void*)ddr_addr, (void*)data_addr, size);
}
// 从 DDR 读取数据
void read_from_ddr(u32 ddr_addr, u32 data_addr, u32 size) {
// 从 DDR 读取数据
memcpy((void*)data_addr, (void*)ddr_addr, size);
// 使能 L1 和 L2 缓存
Xil_DCacheInvalidateRange(data_addr, size);
}
int main() {
// 初始化 NVMe 控制器
nvme_init();
// 在 NVMe 命令缓冲区中写入命令
u32 nvme_cmd = 0x12345678;
memcpy((void*)NVME_CMD_BUF_ADDR, &nvme_cmd, sizeof(nvme_cmd));
// 向 NVMe 控制器发送命令
nvme_send_cmd(NVME_CMD_BUF_ADDR);
// 从 NVMe 控制器读取数据
nvme_read_data(NVME_DATA_BUF_ADDR, sizeof(u32));
// 将数据写入 DDR
write_to_ddr(DDR_BASE_ADDR, NVME_DATA_BUF_ADDR, sizeof(u32));
// 从 DDR 读取数据
u32 data_from_ddr;
read_from_ddr(DDR_BASE_ADDR, (u32)&data_from_ddr, sizeof(data_from_ddr));
// 打印数据
xil_printf("Data from NVMe: 0x%08x\r\n", nvme_cmd);
xil_printf("Data from DDR: 0x%08x\r\n", data_from_ddr);
return 0;
}
```
这是一个简单的示例,实际情况可能更加复杂。在实际开发中,需要根据具体的硬件平台和NVMe控制器的实现进行适当的修改。
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