测试指南

测试环境

mmc_test 测试

mmc_test 的主要功能是测试符合 MMC 子系统的 Host 驱动功能，源码详见 driversmmccoremmc_test.c。

按照下列步骤，执行 mmc_test 测试：

1. 打开 mmc_test 功能
   注： mmc_test 必须要关闭 Block 选项，否则 test 模块不会被内核加载。
   在 Luban 根目录下执行 make kernel-menuconfig，进入 kernel 的功能配置，按如下选择：

   Linux
       Device Drivers
           <*> MMC/SD/SDIO card support
               < >   MMC block device driver
               <*>   MMC host test driver

2. 板子在启动到 Shell 后，挂载 debugfs 文件系统，并查看 test 的测试节点：

   test_wdt 的帮助信息：

   [aic@] # mount -t debugfs none /sys/kernel/debug/
   [aic@] # cd /sys/kernel/debug/mmc0/mmc0\:0001/
   [aic@mmc0:0001] # ls
   state     test      testlist
   [aic@mmc0:0001] # cat testlist # 此时会打印测试选项
   0:      Run all tests
   1:      Basic write (no data verification)
   2:      Basic read (no data verification)
   3:      Basic write (with data verification)
   4:      Basic read (with data verification)
   5:      Multi-block write
   6:      Multi-block read
   7:      Power of two block writes
   8:      Power of two block reads
   9:      Weird sized block writes
   10:     Weird sized block reads
   11:     Badly aligned write
   12:     Badly aligned read
   13:     Badly aligned multi-block write
   14:     Badly aligned multi-block read
   15:     Correct xfer_size at write (start failure)
   16:     Correct xfer_size at read (start failure)
   17:     Correct xfer_size at write (midway failure)
   18:     Correct xfer_size at read (midway failure)
   19:     Highmem write
   20:     Highmem read
   21:     Multi-block highmem write
   22:     Multi-block highmem read
   23:     Best-case read performance
   24:     Best-case write performance
   25:     Best-case read performance into scattered pages
   26:     Best-case write performance from scattered pages
   27:     Single read performance by transfer size
   28:     Single write performance by transfer size
   29:     Single trim performance by transfer size
   30:     Consecutive read performance by transfer size
   31:     Consecutive write performance by transfer size
   32:     Consecutive trim performance by transfer size
   33:     Random read performance by transfer size
   34:     Random write performance by transfer size
   35:     Large sequential read into scattered pages
   36:     Large sequential write from scattered pages
   37:     Write performance with blocking req 4k to 4MB
   38:     Write performance with non-blocking req 4k to 4MB
   39:     Read performance with blocking req 4k to 4MB
   40:     Read performance with non-blocking req 4k to 4MB
   41:     Write performance blocking req 1 to 512 sg elems
   42:     Write performance non-blocking req 1 to 512 sg elems
   43:     Read performance blocking req 1 to 512 sg elems
   44:     Read performance non-blocking req 1 to 512 sg elems
   45:     Reset test
   46:     Commands during read - no Set Block Count (CMD23)
   47:     Commands during write - no Set Block Count (CMD23)
   48:     Commands during read - use Set Block Count (CMD23)
   49:     Commands during write - use Set Block Count (CMD23)
   50:     Commands during non-blocking read - use Set Block Count (CMD23)
   51:     Commands during non-blocking write - use Set Block Count (CMD23)us

3. 根据需求，选一个测试项，将其编号写入 mmc_test 节点，如使用测试项 1：

   [aic@mmc0:0001] # echo 1 > test
   [  162.185679] mmc0: Starting tests of card mmc0:0001...
   [  162.190820] mmc0: Test case 1. Basic write (no data verification)...
   [  162.209563] mmc0: Result: OK
   [  162.212462] mmc0: Tests completed.

   为了方便测试，可以通过以下脚本 批量运行完所有的 mmc_test 测试项：

   #!/bin/sh
   
   run_one_testcase()
   {
       echo $1 > test
       if [ $? -ne 0 ]; then
           echo ERROR: Testcase $i failed!
           exit 110
       fi
   }
   
   run_memtest()
   {
   
       echo Prepare the debugfs ...
       mount -t debugfs none /sys/kernel/debug/
       cd /sys/kernel/debug/mmc0/mmc0:0001
   
       echo
       echo Run memtest ...
       echo
   
       CNT=1
       while true
       do
           echo
           echo ----------------------------------------------------------
           echo Run all the testcase, count $CNT ...
           echo ----------------------------------------------------------
   
           echo
           echo Run in order sequence ...
           echo
   
           for i in `seq 0 51`;
           do
               run_one_testcase $i
           done
   
           echo
           echo Run in random sequence ...
           echo
   
           for i in `seq 0 51`;
           do
               $TMP=`expr $RANDOM % 52`
               run_one_testcase $TMP
           done
   
           CNT=`expr $CNT + 1`
       done
   }
   
   run_memtest()

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