[lkvs] [pcie] New Test: add 3 pcie capability TCs

add 3 pcie capability TCs to cover gen4, gen5 and gen6 platform basic pcie check [Test Components] pcie [Test Types] bat [Supported Devices] all-generic Signed-off-by: Hongyu Ning <[email protected]>
intel · Jul 3, 2024 · 9531ad7 · 9531ad7
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diff --git a/BM/pcie/README.md b/BM/pcie/README.md
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+# pcie related tests description
+
+## case implemented by pcie_check.sh and pcie_check.c for general PCIe capability check
+### for simplicity, only check PCIe Cap Structure (7.5.3 in spec) Max Speed, Current Speed, Supported Speed, Target Speed
+  - PCIe root port (PCI bridge) Gen4 capability test, apply for PCIe Gen4 platform
+  ```
+    ./pcie_check.sh gen4
+  ```
+  - PCIe root port (PCI bridge) Gen5 capability test, apply for PCIe Gen5 platform
+  ```
+    ./pcie_check.sh gen5
+  ```
+  - PCIe root port (PCI bridge) Gen6 capability test, apply for PCIe Gen4 platform
+  ```
+    ./pcie_check.sh gen6
+  ```
diff --git a/BM/pcie/pcie_check.sh b/BM/pcie/pcie_check.sh
@@ -0,0 +1,339 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (c) 2024 Intel Corporation
+
+# Author:   Hongyu Ning <[email protected]>
+#
+# History:  28, Jun., 2024 - Hongyu Ning - creation
+
+
+# @desc This script do basic pcie capability check with lspci and 
+# BM/tools/pcie/pcie_check.c
+# pcie Gen4, Gen5 and Gen6 covered
+# ref spec: PCI-SIG PCI Express® Base Specification Revision 6.0.1 on 29 August 2022
+
+###################### Variables ######################
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+echo "$SCRIPT_DIR"
+
+###################### Functions ######################
+# function to check if PCI bridge exists
+pci_bridge_device_check() {
+  local pci_bridge_device
+  local dev
+  pci_bridge_device=$(lspci -nnv | grep -wE "PCI bridge" | awk '{print $1}')
+  for dev in ${pci_bridge_device[*]}
+    do
+      if [[ -z "$dev" ]]; then
+        die "No PCI bridge device found"
+      fi
+      test_print_trc "PCI bridge device found: $dev"
+    done
+}
+
+# function on convert decimal into binary based on input digits argument
+# example: decimal_to_binary 5 4, covert decimal 5 into binary of 4 digits
+decimal_to_binary() {
+  local decimal
+  local digits
+  decimal=$1
+  digits=$2
+  digits=$((digits+1))
+  echo "obase=2; $decimal" | bc | tail -c "$digits"
+}
+
+# function on PCIe Max Link Speed check, support gen4, gen5 and gen6
+# with arguments of gen4, gen5 or gen6
+pci_max_link_speed() {
+  local gen
+  local dev
+  local reg
+  gen=$1
+  dev="${2#[0-9][0-9][0-9][0-9]:}"
+  # check Link Capabilities Register section 7.5.3.6 in spec
+  reg=$(pcie_check i 10 c 4 | grep "$dev")
+  if [[ "$gen" = "gen5" ]]; then
+    if [[ "$reg" -eq 4 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Max Link Speed is: 32GT/s"
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Max Link Speed registers value $reg" 
+    fi
+    echo 32
+  elif [[ "$gen" = "gen6" ]]; then
+    if [[ "$reg" -eq 5 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Max Link Speed is: 64GT/s"
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Max Link Speed registers value $reg" 
+    fi
+    echo 64
+  elif [[ "$gen" = "gen4" ]]; then
+    if [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Max Link Speed is: 16GT/s"
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Max Link Speed registers value $reg" 
+    fi
+    echo 16
+  else
+    die "PCIe Max Link Speed check failed, invalid gen argument $gen"
+  fi
+}
+
+# function on PCIe Current Link Speed check, support gen4, gen5 and gen6
+# with arguments of gen4, gen5 or gen6
+pci_current_link_speed() {
+  local gen
+  local dev
+  local reg
+  gen=$1
+  dev="${2#[0-9][0-9][0-9][0-9]:}"
+  # check Link Status Register section 7.5.3.8 in spec
+  reg=$(pcie_check i 10 12 4 | grep "$dev")
+  if [[ "$gen" = "gen5" ]]; then
+    if [[ "$reg" -eq 4 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Current Link Speed is: 32GT/s"
+      echo 32
+    elif [[ "$reg" -eq 3 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 16GT/s (downgraded)"
+      echo 16
+    elif [[ "$reg" -eq 2 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 8GT/s (downgraded)"
+      echo 8
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 5GT/s (downgraded)"
+      echo 5
+    elif [[ "$reg" -eq 0 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 2.5GT/s (downgraded)"
+      echo 2.5
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed registers value $reg" 
+      echo 0
+    fi
+  elif [[ "$gen" = "gen6" ]]; then
+    if [[ "$reg" -eq 5 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Current Link Speed is: 64GT/s"
+      echo 64
+    elif [[ "$reg" -eq 4 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 32GT/s (downgraded)"
+      echo 32
+    elif [[ "$reg" -eq 3 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 16GT/s (downgraded)"
+      echo 16
+    elif [[ "$reg" -eq 2 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 8GT/s (downgraded)"
+      echo 8
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 5GT/s (downgraded)"
+      echo 5
+    elif [[ "$reg" -eq 0 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 2.5GT/s (downgraded)"
+      echo 2.5
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed registers value $reg" 
+      echo 0
+    fi
+  elif [[ "$gen" = "gen4" ]]; then
+    if [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Current Link Speed is: 16GT/s"
+      echo 16
+    elif [[ "$reg" -eq 2 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 8GT/s (downgraded)"
+      echo 8
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 5GT/s (downgraded)"
+      echo 5
+    elif [[ "$reg" -eq 0 ]]; then
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed is: 2.5GT/s (downgraded)"
+      echo 2.5
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Current Link Speed registers value $reg" 
+      echo 0
+    fi
+  else
+    die "PCIe Current Link Speed check failed, invalid gen argument $gen"
+  fi
+}
+
+# function on PCIe Supported Link Speed check, support gen4, gen5 and gen6
+# with arguments of gen4, gen5 or gen6
+pci_supported_link_speed() {
+  local gen
+  local dev
+  local reg
+  gen=$1
+  dev="${2#[0-9][0-9][0-9][0-9]:}"
+  # check Link Capabilities 2 Register section
+  # 8 bits vector, bit 0 is reserved, so need to remove it
+  reg=$(pcie_check i 10 2c 8 | grep "$dev")
+  reg=${$(decimal_to_binary "$reg" 8)%[0-1]}
+  if [[ "$gen" = "gen5" ]]; then
+    if [[ "$reg" -eq 31 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-32GT/s"
+      echo "2.5-32GT/s"
+    elif [[ "$reg" -eq 15 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-16GT/s"
+      echo "2.5-16GT/s"
+    elif [[ "$reg" -eq 7 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-8GT/s"
+      echo "2.5-8GT/s"
+    elif [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-5GT/s"
+      echo "2.5-5GT/s"
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5GT/s"
+      echo "2.5GT/s"
+    else
+      test_print_wrn "PCI bridge: $dev, PCIe Supported Link Speeds registers value $reg" 
+      echo "0"
+    fi
+  elif [[ "$gen" = "gen6" ]]; then
+    if [[ "$reg" -eq 63 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-64GT/s"
+      echo "2.5-64GT/s"
+    elif [[ "$reg" -eq 31 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-32GT/s"
+      echo "2.5-32GT/s"
+    elif [[ "$reg" -eq 15 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-16GT/s"
+      echo "2.5-16GT/s"
+    elif [[ "$reg" -eq 7 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-8GT/s"
+      echo "2.5-8GT/s"
+    elif [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-5GT/s"
+      echo "2.5-5GT/s"
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5GT/s"
+      echo "2.5GT/s"
+    else
+      test_print_wrn "PCI bridge: $dev, PCIe Supported Link Speeds registers value $reg" 
+      echo "0"
+    fi
+  elif [[ "$gen" = "gen4" ]]; then
+    if [[ "$reg" -eq 15 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-16GT/s"
+      echo "2.5-16GT/s"
+    elif [[ "$reg" -eq 7 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-8GT/s"
+      echo "2.5-8GT/s"
+    elif [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5-5GT/s"
+      echo "2.5-5GT/s"
+    elif [[ "$reg" -eq 1 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Supported Link Speeds: 2.5GT/s"
+      echo "2.5GT/s"
+    else
+      test_print_wrn "PCI bridge: $dev, PCIe Supported Link Speeds registers value $reg" 
+      echo "0"
+    fi
+  else
+    die "PCIe Supported Link Speed check failed, invalid gen argument $gen"
+  fi
+}
+
+# function on PCIe Target Link Speed check, support gen4, gen5 and gen6
+# with arguments of gen4, gen5 or gen6
+pci_target_link_speed() {
+  local gen
+  local dev
+  local reg
+  gen=$1
+  dev="${2#[0-9][0-9][0-9][0-9]:}"
+  # check Link Control 2 Register section
+  reg=$(pcie_check i 10 30 4 | grep "$dev")
+  if [[ "$gen" = "gen5" ]]; then
+    if [[ "$reg" -eq 4 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Target Link Speed is: 32GT/s"
+      echo 32
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Target Link Speed registers value $reg" 
+      echo 0
+    fi
+  elif [[ "$gen" = "gen6" ]]; then
+    if [[ "$reg" -eq 5 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Target Link Speed is: 64GT/s"
+      echo 64
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Target Link Speed registers value $reg"
+      echo 0
+    fi
+  elif [[ "$gen" = "gen4" ]]; then
+    if [[ "$reg" -eq 3 ]]; then
+      test_print_trc "PCI bridge: $dev, PCIe Target Link Speed is: 16GT/s"
+      echo 16
+    else
+      reg=$(decimal_to_binary "$reg" 4)
+      test_print_wrn "PCI bridge: $dev, PCIe Target Link Speed registers value $reg"
+      echo 0
+    fi
+  else
+    die "PCIe Target Link Speed check failed, invalid gen argument $gen"
+  fi
+}
+
+###################### Do Works ######################
+cd "$(dirname "$0")" 2>/dev/null || exit 1
+source ../.env
+
+# run pre-check
+pci_bridge_device_check
+
+# run pcie capability check
+local pci_bridge_device
+local dev
+local gen=$1
+local max_speed=0
+local current_speed=0
+local support_speed
+local target_speed=0
+local passed=0
+
+pci_bridge_device=$(lspci -nnv | grep -wE "PCI bridge" | awk '{print $1}')
+for dev in ${pci_bridge_device[*]}
+  do
+    max_speed=$(pci_max_link_speed $gen $dev)
+    current_speed=$(pci_current_link_speed $gen $dev)
+    support_speed=$(pci_supported_link_speed $gen $dev)
+    target_speed=$(pci_target_link_speed $gen $dev)
+    if [[ "$gen" != "gen4" && "$gen" != "gen5" && "$gen" != "gen6" ]]; then
+      die "Invalid gen argument $gen"
+    elif [[ "$gen" = "gen4" ]]; then
+      # check if max speed is 16GT/s, support speed is 2.5-16GT/s and target speed is 16GT/s
+      # bypass current link speed check as it may be downgraded due to various reasons
+      if [[ "$max_speed" -eq 16 && "$support_speed" = "2.5-16GT/s" && "$target_speed" -eq 16 ]]; then
+        test_print_trc "PCI bridge: $dev, PCIe Gen4 capability check passed"
+        passed=1
+        break
+      fi
+    elif [[ "$gen" = "gen5" ]]; then
+      # check if max speed is 32GT/s, support speed is 2.5-32GT/s and target speed is 32GT/s
+      # bypass current link speed check as it may be downgraded due to various reasons
+      if [[ "$max_speed" -eq 32 && "$support_speed" = "2.5-64GT/s" && "$target_speed" -eq 32 ]]; then
+        test_print_trc "PCI bridge: $dev, PCIe Gen5 capability check passed"
+        passed=1
+        break
+      fi
+    elif [[ "$gen" = "gen6" ]]; then
+      # check if max speed is 64GT/s, support speed is 2.5-64GT/s and target speed is 64GT/s
+      # bypass current link speed check as it may be downgraded due to various reasons
+      if [[ "$max_speed" -eq 64 && "$support_speed" = "2.5-64GT/s" && "$target_speed" -eq 64 ]]; then
+        test_print_trc "PCI bridge: $dev, PCIe Gen6 capability check passed"
+        passed=1
+        break
+      fi
+    fi
+    die "PCI bridge: $dev, PCIe $gen capability check failed"
+  done
+
+if [[ "$passed" -eq 1 ]]; then
+  test_print_trc "PCIe $gen capability check test completed successfully"
+else
+  die "PCIe $gen capability check failed after all PCI bridge devices checked"
+fi
diff --git a/BM/pcie/tests b/BM/pcie/tests
@@ -0,0 +1,8 @@
+# This file collects PCIe tests on Intel® Architecture-based platforms.
+
+# case info: PCIe gen4 device capability check
+./pcie_check.sh gen4
+# case info: PCIe gen5 device capability check
+./pcie_check.sh gen5
+# case info: PCIe gen6 device capability check
+./pcie_check.sh gen6