DragonOS-Community/DragonOS
4
1
Fork 0
mirror of https://github.com/DragonOS-Community/DragonOS.git synced 2025-06-12 01:46:48 +00:00
Code Issues Releases Wiki Activity

🆕 注册xhci中断

Browse Source
This commit is contained in:
fslongjin 2022-07-21 14:03:07 +08:00
parent 20a191d149
commit c9c8147cdf
2 changed files with 329 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

246
kernel/driver/usb/xhci/xhci.c
View File

@ -6,6 +6,8 @@
#include <mm/slab.h>
#include <debug/traceback/traceback.h>
#include <common/time.h>
#include <exception/irq.h>
#include <driver/interrupt/apic/apic.h>
spinlock_t xhci_controller_init_lock; // xhci控制器初始化锁(在usb_init中被初始化)
@ -13,6 +15,20 @@ static int xhci_ctrl_count = 0; // xhci控制器计数
static struct xhci_host_controller_t xhci_hc[XHCI_MAX_HOST_CONTROLLERS] = {0};
void xhci_hc_irq_enable(uint64_t irq_num);
void xhci_hc_irq_disable(uint64_t irq_num);
uint64_t xhci_hc_irq_install(uint64_t irq_num, void *arg);
void xhci_hc_irq_uninstall(uint64_t irq_num);
hardware_intr_controller xhci_hc_intr_controller =
{
.enable = xhci_hc_irq_enable,
.disable = xhci_hc_irq_disable,
.install = xhci_hc_irq_install,
.uninstall = xhci_hc_irq_uninstall,
.ack = apic_local_apic_edge_ack,
};
/*
注意！！！
@ -47,6 +63,23 @@ static struct xhci_host_controller_t xhci_hc[XHCI_MAX_HOST_CONTROLLERS] = {0};
#define xhci_get_ptr_op_reg64(id, offset) ((uint64_t *)(xhci_hc[id].vbase_op + offset))
#define xhci_write_op_reg64(id, offset, value) (*(uint64_t *)(xhci_hc[id].vbase_op + offset) = (uint64_t)value)
/**
* @brief 计算中断寄存器组虚拟地址
* @param id 主机控制器id
* @param num xhci中断寄存器组号
*/
#define xhci_calc_intr_vaddr(id, num) (xhci_hc[id].vbase + xhci_hc[id].rts_offset + XHCI_RT_IR0 + num * XHCI_IR_SIZE)
/**
* @brief 读取/写入中断寄存器
* @param id 主机控制器id
* @param num xhci中断寄存器组号
* @param intr_offset 寄存器在当前寄存器组中的偏移量
*/
#define xhci_read_intr_reg32(id, num, intr_offset) (*(uint32_t *)(xhci_calc_intr_vaddr(id, num) + intr_offset))
#define xhci_write_intr_reg32(id, num, intr_offset, value) (*(uint32_t *)(xhci_calc_intr_vaddr(id, num) + intr_offset) = value)
#define xhci_read_intr_reg64(id, num, intr_offset) (*(uint64_t *)(xhci_calc_intr_vaddr(id, num) + intr_offset))
#define xhci_write_intr_reg64(id, num, intr_offset, value) (*(uint64_t *)(xhci_calc_intr_vaddr(id, num) + intr_offset) = value)
#define xhci_is_aligned64(addr) ((addr & 0x3f) == 0) // 是否64bytes对齐
/**
@ -243,6 +276,28 @@ static int xhci_hc_stop_legacy(int id)
return 0;
}
/**
* @brief 启用指定xhci控制器的调度
*
* @param id 控制器id
* @return int
*/
static int xhci_hc_start_sched(int id)
{
xhci_write_op_reg32(id, XHCI_OPS_USBCMD, (1 << 0) | (1 >> 2) | (1 << 3));
}
/**
* @brief 停止指定xhci控制器的调度
*
* @param id 控制器id
* @return int
*/
static int xhci_hc_stop_sched(int id)
{
xhci_write_op_reg32(id, XHCI_OPS_USBCMD, 0x00);
}
/**
* @brief
*
@ -300,7 +355,7 @@ static int xhci_hc_pair_ports(int id)
{
struct xhci_caps_HCSPARAMS1_reg_t hcs1;
memcpy(&hcs1, xhci_get_ptr_cap_reg32(id, XHCI_CAPS_HCSPARAMS1), sizeof(struct xhci_caps_HCCPARAMS1_reg_t));
memcpy(&hcs1, xhci_get_ptr_cap_reg32(id, XHCI_CAPS_HCSPARAMS1), sizeof(struct xhci_caps_HCSPARAMS1_reg_t));
// 从hcs1获取端口数量
xhci_hc[id].port_num = hcs1.max_ports;
@ -407,13 +462,13 @@ static int xhci_hc_pair_ports(int id)
* @brief 创建ring，并将最后一个trb指向头一个trb
*
* @param trbs 要创建的trb数量
* @return uint64_t
* @return uint64_t trb数组的起始虚拟地址
*/
static uint64_t xhci_create_ring(int trbs)
{
int total_size = trbs * sizeof(struct xhci_TRB_t);
const uint64_t vaddr = (uint64_t)kmalloc(total_size, 0);
memset(vaddr, 0, total_size);
memset((void *)vaddr, 0, total_size);
// 设置最后一个trb为link trb
xhci_TRB_set_link_cmd(vaddr + total_size - sizeof(sizeof(struct xhci_TRB_t)));
@ -421,6 +476,150 @@ static uint64_t xhci_create_ring(int trbs)
return vaddr;
}
/**
* @brief 创建新的event ring table和对应的ring segment
*
* @param trbs 包含的trb的数量
* @param ret_ring_addr 返回的第一个event ring segment的基地址（虚拟）
* @return uint64_t trb table的虚拟地址
*/
static uint64_t xhci_create_event_ring(int trbs, uint64_t *ret_ring_addr)
{
const uint64_t table_vaddr = (const uint64_t)kmalloc(64, 0); // table支持8个segment
if (unlikely(table_vaddr == NULL))
return -ENOMEM;
memset((void *)table_vaddr, 0, 64);
// 暂时只创建1个segment
const uint64_t seg_vaddr = (const uint64_t)kmalloc(trbs * sizeof(struct xhci_TRB_t), 0);
if (unlikely(seg_vaddr == NULL))
return -ENOMEM;
memset((void *)seg_vaddr, 0, trbs * sizeof(struct xhci_TRB_t));
// 将segment地址和大小写入table
*(uint64_t *)(table_vaddr) = virt_2_phys(seg_vaddr);
*(uint64_t *)(table_vaddr + 8) = trbs;
*ret_ring_addr = seg_vaddr;
return table_vaddr;
}
void xhci_hc_irq_enable(uint64_t irq_num)
{
int cid = xhci_find_hcid_by_irq_num(irq_num);
if (WARN_ON(cid == -1))
return;
pci_start_msi(xhci_hc[cid].pci_dev_hdr);
xhci_hc_start_sched(cid);
}
void xhci_hc_irq_disable(uint64_t irq_num)
{
int cid = xhci_find_hcid_by_irq_num(irq_num);
if (WARN_ON(cid == -1))
return;
xhci_hc_stop_sched(cid);
pci_disable_msi(xhci_hc[cid].pci_dev_hdr);
}
uint64_t xhci_hc_irq_install(uint64_t irq_num, void *arg)
{
int cid = xhci_find_hcid_by_irq_num(irq_num);
if (WARN_ON(cid == -1))
return -EINVAL;
struct xhci_hc_irq_install_info_t *info = (struct xhci_hc_irq_install_info_t *)arg;
pci_enable_msi(xhci_hc[cid].pci_dev_hdr, irq_num, info->processor, info->edge_trigger, info->assert);
return 0;
}
void xhci_hc_irq_uninstall(uint64_t irq_num)
{
// todo
int cid = xhci_find_hcid_by_irq_num(irq_num);
if (WARN_ON(cid == -1))
return;
xhci_hc_stop(cid);
}
/**
* @brief xhci主机控制器的中断处理函数
*
* @param irq_num 中断向量号
* @param cid 控制器号
* @param regs 寄存器值
*/
void xhci_hc_irq_handler(uint64_t irq_num, uint64_t cid, struct pt_regs *regs)
{
// todo: handle irq
kdebug("USB irq received.");
}
/**
* @brief 初始化xhci主机控制器的中断控制
*
* @param id 主机控制器id
* @return int 返回码
*/
static int xhci_hc_init_intr(int id)
{
uint64_t retval = 0;
struct xhci_caps_HCSPARAMS1_reg_t hcs1;
struct xhci_caps_HCSPARAMS2_reg_t hcs2;
memcpy(&hcs1, xhci_get_ptr_cap_reg32(id, XHCI_CAPS_HCSPARAMS1), sizeof(struct xhci_caps_HCSPARAMS1_reg_t));
memcpy(&hcs2, xhci_get_ptr_cap_reg32(id, XHCI_CAPS_HCSPARAMS2), sizeof(struct xhci_caps_HCSPARAMS2_reg_t));
uint32_t max_segs = (1 << (uint32_t)(hcs2.ERST_Max));
uint32_t max_interrupters = hcs1.max_intrs;
// 创建 event ring
retval = xhci_create_event_ring(4096, &xhci_hc[id].event_ring_vaddr);
if (unlikely((int64_t)(retval) == -ENOMEM))
return -ENOMEM;
xhci_hc[id].event_ring_table_vaddr = retval;
retval = 0;
xhci_hc[id].current_event_ring_cycle = 1;
// 写入第0个中断寄存器组
xhci_write_intr_reg32(id, 0, XHCI_IR_MAN, 0x3); // 使能中断并清除pending位（这个pending位是写入1就清0的）
xhci_write_intr_reg32(id, 0, XHCI_IR_MOD, 0); // 关闭中断管制
xhci_write_intr_reg32(id, 0, XHCI_IR_TABLE_SIZE, 1); // 当前只有1个segment
xhci_write_intr_reg64(id, 0, XHCI_IR_DEQUEUE, virt_2_phys(xhci_hc[id].event_ring_vaddr) | (1 << 3)); // 写入dequeue寄存器，并清除busy位（写1就会清除）
xhci_write_intr_reg64(id, 0, XHCI_IR_TABLE_ADDR, virt_2_phys(xhci_hc[id].event_ring_table_vaddr)); // 写入table地址
// 清除状态位
struct xhci_ops_usbsts_reg_t sts = {0};
sts.hse = 1;
sts.eint = 1;
sts.pcd = 1;
sts.sre = 1;
kdebug("new_sts=%#010lx", *(uint32_t *)(&sts));
xhci_write_op_reg32(id, XHCI_OPS_USBSTS, *(uint32_t *)(&sts));
// 开启usb中断
// 注册中断处理程序
struct xhci_hc_irq_install_info_t install_info;
install_info.assert = 0;
install_info.edge_trigger = 1;
install_info.processor = 0; // 投递到bsp
char *buf = (char *)kmalloc(16, 0);
memset(buf, 0, 16);
sprintk(buf, "xHCI HC%d", id);
irq_register(xhci_controller_irq_num[id], &install_info, &xhci_hc_irq_handler, id, &xhci_hc_intr_controller, buf);
kfree(buf);
kdebug("xhci host controller %d: interrupt registered. irq num=%d", id, xhci_controller_irq_num[id]);
return 0;
}
/**
* @brief 初始化xhci控制器
*
@ -464,9 +663,9 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
struct xhci_caps_HCSPARAMS1_reg_t hcs1;
struct xhci_caps_HCSPARAMS2_reg_t hcs2;
memcpy(&hcc1, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCCPARAMS1), sizeof(struct xhci_caps_HCCPARAMS1_reg_t));
memcpy(&hcc2, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCCPARAMS2), sizeof(struct xhci_caps_HCCPARAMS1_reg_t));
memcpy(&hcs1, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCSPARAMS1), sizeof(struct xhci_caps_HCCPARAMS1_reg_t));
memcpy(&hcs2, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCSPARAMS2), sizeof(struct xhci_caps_HCCPARAMS1_reg_t));
memcpy(&hcc2, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCCPARAMS2), sizeof(struct xhci_caps_HCCPARAMS2_reg_t));
memcpy(&hcs1, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCSPARAMS1), sizeof(struct xhci_caps_HCSPARAMS1_reg_t));
memcpy(&hcs2, xhci_get_ptr_cap_reg32(cid, XHCI_CAPS_HCSPARAMS2), sizeof(struct xhci_caps_HCSPARAMS2_reg_t));
// kdebug("hcc1.xECP=%#010lx", hcc1.xECP);
// 计算operational registers的地址
@ -500,13 +699,14 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
// 端口配对
FAIL_ON(xhci_hc_pair_ports(cid), failed);
// ========== 设置USB host controller =========
// 获取页面大小
xhci_hc[cid].page_size = (xhci_read_op_reg32(cid, XHCI_OPS_PAGESIZE) & 0xffff) << 12;
kdebug("pg size=%d", xhci_hc[cid].page_size);
kdebug("page size=%d", xhci_hc[cid].page_size);
// 获取设备上下文空间
xhci_hc[cid].dcbaap_vaddr = (uint64_t)kmalloc(2048, 0); // 分配2KB的设备上下文地址数组空间
memset(xhci_hc[cid].dcbaap_vaddr, 0, 2048);
memset((void *)xhci_hc[cid].dcbaap_vaddr, 0, 2048);
kdebug("dcbaap_vaddr=%#018lx", xhci_hc[cid].dcbaap_vaddr);
if (unlikely(!xhci_is_aligned64(xhci_hc[cid].dcbaap_vaddr))) // 地址不是按照64byte对齐
@ -516,14 +716,42 @@ void xhci_init(struct pci_device_structure_general_device_t *dev_hdr)
}
// 写入dcbaap
xhci_write_cap_reg64(cid, XHCI_OPS_DCBAAP, virt_2_phys(xhci_hc[cid].dcbaap_vaddr));
// 创建command ring
xhci_hc[cid].cmd_ring_vaddr = xhci_create_ring(XHCI_CMND_RING_TRBS);
if (unlikely(!xhci_is_aligned64(xhci_hc[cid].cmd_ring_vaddr))) // 地址不是按照64byte对齐
{
kerror("cmd ring isn't 64 byte aligned.");
goto failed_free_dyn;
}
// 设置初始cycle bit为1
xhci_hc[cid].cmd_trb_cycle = XHCI_TRB_CYCLE_ON;
// 写入command ring控制寄存器
xhci_write_op_reg64(cid, XHCI_OPS_CRCR, virt_2_phys(xhci_hc[cid].cmd_ring_vaddr) | xhci_hc[cid].cmd_trb_cycle);
// 写入配置寄存器
xhci_write_op_reg32(cid, XHCI_OPS_CONFIG, hcs1.max_slots);
// 写入设备通知控制寄存器
xhci_write_op_reg32(cid, XHCI_OPS_DNCTRL, (1 << 1)); // 目前只有N1被支持
FAIL_ON(xhci_hc_init_intr(cid), failed_free_dyn);
++xhci_ctrl_count;
spin_unlock(&xhci_controller_init_lock);
return;
failed_free_dyn:; // 释放动态申请的内存
if (xhci_hc[cid].dcbaap_vaddr)
kfree(xhci_hc[cid].dcbaap_vaddr);
kfree((void *)xhci_hc[cid].dcbaap_vaddr);
if (xhci_hc[cid].cmd_ring_vaddr)
kfree((void *)xhci_hc[cid].cmd_ring_vaddr);
if (xhci_hc[cid].event_ring_table_vaddr)
kfree((void *)xhci_hc[cid].event_ring_table_vaddr);
if (xhci_hc[cid].event_ring_vaddr)
kfree((void *)xhci_hc[cid].event_ring_vaddr);
failed:;
// 取消地址映射

117
kernel/driver/usb/xhci/xhci.h
View File

@ -5,6 +5,35 @@
#define XHCI_MAX_HOST_CONTROLLERS 4 // 本驱动程序最大支持4个xhci root hub controller
#define XHCI_MAX_ROOT_HUB_PORTS 128 // 本驱动程序最大支持127个root hub 端口（第0个保留）
// ========== irq BEGIN ===========
/**
* @brief 每个xhci控制器的中断向量号
*
*/
const uint8_t xhci_controller_irq_num[XHCI_MAX_HOST_CONTROLLERS] = {157, 158, 159, 160};
/**
* @brief 通过irq号寻找对应的主机控制器id
*
*/
#define xhci_find_hcid_by_irq_num(irq_num) ({ \
int retval = -1; \
for (int i = 0; i < XHCI_MAX_HOST_CONTROLLERS; ++i) \
if (xhci_controller_irq_num[i] == irq_num) \
retval = i; \
retval; \
})
struct xhci_hc_irq_install_info_t
{
int processor; // 中断目标处理器
int8_t edge_trigger; // 是否边缘触发
int8_t assert; // 是否高电平触发
};
// ========== irq END ===========
// ======== Capability Register Set BEGIN ============
// xhci Capability Registers offset
#define XHCI_CAPS_CAPLENGTH 0x00 // Cap 寄存器组的长度
#define XHCI_CAPS_RESERVED 0x01
@ -28,7 +57,7 @@ struct xhci_caps_HCSPARAMS1_reg_t
struct xhci_caps_HCSPARAMS2_reg_t
{
unsigned ist : 4; // 同步调度阈值
unsigned ERST_Max : 4; // Event Ring Segment Table Max
unsigned ERST_Max : 4; // Event Ring Segment Table: Max segs
unsigned Reserved : 13;
unsigned max_scratchpad_buf_HI5 : 5; // 草稿行buffer地址（高5bit）
unsigned spr : 1; // scratchpad restore
@ -73,6 +102,9 @@ struct xhci_caps_HCCPARAMS2_reg_t
unsigned cic : 1; // configuration information capability
unsigned Reserved : 26;
} __attribute__((packed));
// ======== Capability Register Set END ============
// ======== Operational Register Set BEGIN =========
// xhci operational registers offset
#define XHCI_OPS_USBCMD 0x00 // USB Command
@ -137,30 +169,8 @@ struct xhci_ops_config_reg_t
unsigned rsvd_psvd : 22; // Reserved and Preserved
} __attribute__((packed));
// xhci Extended Capabilities List ID
// ID 部分的含义定义
#define XHCI_XECP_ID_RESERVED 0
#define XHCI_XECP_ID_LEGACY 1 // USB Legacy Support
#define XHCI_XECP_ID_PROTOCOL 2 // Supported protocol
#define XHCI_XECP_ID_POWER 3 // Extended power management
#define XHCI_XECP_ID_IOVIRT 4 // I/0 virtualization
#define XHCI_XECP_ID_MSG 5 // Message interrupt
#define XHCI_XECP_ID_LOCAL_MEM 6 // local memory
#define XHCI_XECP_ID_DEBUG 10 // USB Debug capability
#define XHCI_XECP_ID_EXTMSG 17 // Extended message interrupt
#define XHCI_XECP_LEGACY_TIMEOUT 10 // 设置legacy状态的等待时间
#define XHCI_XECP_LEGACY_BIOS_OWNED (1 << 16) // 当bios控制着该hc时，该位被置位
#define XHCI_XECP_LEGACY_OS_OWNED (1 << 24) // 当系统控制着该hc时，该位被置位
#define XHCI_XECP_LEGACY_OWNING_MASK (XHCI_XECP_LEGACY_BIOS_OWNED | XHCI_XECP_LEGACY_OS_OWNED)
// 端口信息标志位
#define XHCI_PROTOCOL_USB2 0
#define XHCI_PROTOCOL_USB3 1
#define XHCI_PROTOCOL_INFO (1 << 0) // 1->usb3, 0->usb2
#define XHCI_PROTOCOL_HSO (1 << 1) // 1-> usb2 high speed only
#define XHCI_PROTOCOL_HAS_PAIR (1 << 2) // 当前位被置位，意味着当前端口具有一个与之配对的端口
#define XHCI_PROTOCOL_ACTIVE (1 << 3) // 当前端口是这个配对中，被激活的端口
// ======== Operational Register Set END =========
// ========= TRB begin ===========
// TRB的Transfer Type可用值定义
#define XHCI_TRB_TRT_NO_DATA 0
@ -172,6 +182,9 @@ struct xhci_ops_config_reg_t
#define XHCI_TRBS_PER_RING 256
#define XHCI_TRB_CYCLE_OFF 0
#define XHCI_TRB_CYCLE_ON 1
/**
* @brief xhci通用TRB结构
*
@ -285,6 +298,56 @@ struct xhci_TRB_cmd_complete_t
uint8_t slot_id; // the id of the slot associated with the
// command that generated the event
} __attribute__((packed));
// ========= TRB end ===========
// ======== Runtime Register Set Begin =========
#define XHCI_RT_IR0 0x20 // 中断寄存器组0距离runtime Register set起始位置的偏移量
#define XHCI_IR_SIZE 32 // 中断寄存器组大小
// 中断寄存器组内的偏移量
#define XHCI_IR_MAN 0x00 // Interrupter Management Register
#define XHCI_IR_MOD 0x04 // Interrupter Moderation
#define XHCI_IR_TABLE_SIZE 0x08 // Event Ring Segment Table size (count of segments)
#define XHCI_IR_TABLE_ADDR 0x10 // Event Ring Segment Table Base Address
#define XHCI_IR_DEQUEUE 0x18 // Event Ring Dequeue Pointer
// MAN寄存器内的bit的含义
#define XHCI_IR_IMR_PENDING (1 << 0) // Interrupt pending bit in Management Register
#define XHCI_IR_IMR_ENABLE (1 << 1) // Interrupt enable bit in Management Register
struct xhci_intr_moderation_t
{
uint16_t interval; // 产生一个中断的时间，是interval*250ns (wait before next interrupt)
uint16_t counter;
} __attribute__((packed));
// ======== Runtime Register Set END =========
// ======= xhci Extended Capabilities List ========
// ID 部分的含义定义
#define XHCI_XECP_ID_RESERVED 0
#define XHCI_XECP_ID_LEGACY 1 // USB Legacy Support
#define XHCI_XECP_ID_PROTOCOL 2 // Supported protocol
#define XHCI_XECP_ID_POWER 3 // Extended power management
#define XHCI_XECP_ID_IOVIRT 4 // I/0 virtualization
#define XHCI_XECP_ID_MSG 5 // Message interrupt
#define XHCI_XECP_ID_LOCAL_MEM 6 // local memory
#define XHCI_XECP_ID_DEBUG 10 // USB Debug capability
#define XHCI_XECP_ID_EXTMSG 17 // Extended message interrupt
#define XHCI_XECP_LEGACY_TIMEOUT 10 // 设置legacy状态的等待时间
#define XHCI_XECP_LEGACY_BIOS_OWNED (1 << 16) // 当bios控制着该hc时，该位被置位
#define XHCI_XECP_LEGACY_OS_OWNED (1 << 24) // 当系统控制着该hc时，该位被置位
#define XHCI_XECP_LEGACY_OWNING_MASK (XHCI_XECP_LEGACY_BIOS_OWNED | XHCI_XECP_LEGACY_OS_OWNED)
// 端口信息标志位
#define XHCI_PROTOCOL_USB2 0
#define XHCI_PROTOCOL_USB3 1
#define XHCI_PROTOCOL_INFO (1 << 0) // 1->usb3, 0->usb2
#define XHCI_PROTOCOL_HSO (1 << 1) // 1-> usb2 high speed only
#define XHCI_PROTOCOL_HAS_PAIR (1 << 2) // 当前位被置位，意味着当前端口具有一个与之配对的端口
#define XHCI_PROTOCOL_ACTIVE (1 << 3) // 当前端口是这个配对中，被激活的端口
/**
* @brief xhci端口信息
@ -314,6 +377,10 @@ struct xhci_host_controller_t
uint8_t page_size; // page size
uint64_t dcbaap_vaddr; // Device Context Base Address Array Pointer的虚拟地址
uint64_t cmd_ring_vaddr; // command ring的虚拟地址
uint64_t event_ring_vaddr; // event ring的虚拟地址
uint64_t event_ring_table_vaddr; // event ring table的虚拟地址
uint8_t cmd_trb_cycle; // 当前command ring cycle
uint8_t current_event_ring_cycle; // 当前event ring cycle
struct xhci_port_info_t ports[XHCI_MAX_ROOT_HUB_PORTS]; // 指向端口信息数组的指针(由于端口offset是从1开始的，因此该数组第0项为空)
};