#!/usr/bin/bash

# 收集pcie信息
parse_regions() {
    lspci -vv -s "$1" | awk '/Region [0-9]+:/'
}

get_pcie_topo() {
    lspci -vt
}

show_acs() {
    lspci -vvs "$1" | grep ACS
}

show_link_status() {
    local info=$(lspci -vv -s "$1")

    declare -A lnk=(
        [cur_speed]=$(grep -ioP 'LnkSta:\s+Speed\s\K[\d.]+' <<< "$info")
        [max_speed]=$(grep -ioP 'LnkCap:\s+Speed\s\K[\d.]+' <<< "$info")
        [cur_width]=$(grep -ioP 'LnkSta.*Width\sx\K\d+' <<< "$info")
        [max_width]=$(grep -ioP 'LnkCap.*Width\sx\K\d+' <<< "$info")
    )
    echo "当前状态  : x${lnk[cur_width]} @ ${lnk[cur_speed]}GT/s "
}
show_busmaster() {
    lspci -vv -s "$1" | grep BusMaster | awk '{print $4}'
}
collect_pcie_logs() {
	log "收集PCIe系统信息"
	lspci -D -d :$DEVICE_ID | while read -r dev; do
		id=${dev:0:12}
        name=${dev:12}
        echo
        echo "$(hline)"
        echo "设备 ${id}"
        echo "型号      : ${name}"
        echo "$(hline)"
        echo
        echo "BAR 内存映射："
        parse_regions "$id" | sed 's/^/  /'
        echo
        echo "PCIe 链路状态："
        show_link_status "$id" | sed 's/^/  /'
        echo
        echo "PCIe ACS设置"
        show_acs "$id"  | sed 's/^/  /'
        echo
        echo "BusMaster设置"
        show_busmaster "$id"  | sed 's/^/  /'
    done
	
}

get_pcie_info() {
	log "收集PCIe系统信息"
	collect_pcie_logs >  $OUTPUT_DIR/pcie_info.log
	get_pcie_topo > $OUTPUT_DIR/pcie_vt.log 2>&1
	lspci -vvv > $OUTPUT_DIR/pcie_more.log 2>&1
	log "PCIe 信息收集完毕"
}

analyze_regions() {
    local address
    echo "$1"

    # 提取Region关键参数
	address=$(echo "$1" | awk '/Memory at/ {print $5}')
    
    # 判定逻辑实现
    if [[ "$address" == "unassigned" ]]; then
        echo "[ERROR] Bar地址未分配，需要检查卡的状态（物理连接或供电异常）" 
        echo "建议操作：执行'lspci -vvv'确认设备识别状态}"
        return 1
    elif [[ `echo $address | wc -c` -gt 12 ]]; then
        echo "[WARNING] Bar地址超出44bit（当前地址：0x${address}）"
        echo "解决方案：调整BIOS的MMIO High Base < 16T}"
        return 2
    fi
	if [[ "$address"  == "<ignored>" ]]; then
        echo "[ERROR] 获取不到bar地址"
        echo "修复建议：检查/proc/cmdline是否包含'pcie=realloc'配置"
        grep -q "pcie=realloc" /proc/cmdline || echo "  当前配置：$(cat /proc/cmdline)"
        return 3
    fi
    echo "PCIe 状态正常"
    return 0
}

pcie_check() {
    if [ ! -f "$1" ]; then
        echo "file not exists" >&2
        exit 1
    fi
	echo "Region 0地址测试"
	grep "Region 0" $1 | while read -r line; do
		analyze_regions "$line"
	done
	echo "Region 5 地址测试"
	grep "Region 5" $1 | while read -r line; do
		analyze_regions "$line"
	done
}