drivers/misc/mic/card/mic_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel MIC Platform Software Stack (MPSS)
   4  *
   5  * Copyright(c) 2013 Intel Corporation.
   6  *
   7  * Disclaimer: The codes contained in these modules may be specific to
   8  * the Intel Software Development Platform codenamed: Knights Ferry, and
   9  * the Intel product codenamed: Knights Corner, and are not backward
  10  * compatible with other Intel products. Additionally, Intel will NOT
  11  * support the codes or instruction set in future products.
  12  *
  13  * Intel MIC Card driver.
  14  */
  15 #include <linux/debugfs.h>
  16 #include <linux/delay.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/device.h>
  20
  21 #include "../common/mic_dev.h"
  22 #include "mic_device.h"
  23
  24 /* Debugfs parent dir */
  25 static struct dentry *mic_dbg;
  26
  27 /**
  28  * mic_intr_show - Send interrupts to host.
  29  */
  30 static int mic_intr_show(struct seq_file *s, void *unused)
  31 {
  32         struct mic_driver *mdrv = s->private;
  33         struct mic_device *mdev = &mdrv->mdev;
  34
  35         mic_send_intr(mdev, 0);
  36         msleep(1000);
  37         mic_send_intr(mdev, 1);
  38         msleep(1000);
  39         mic_send_intr(mdev, 2);
  40         msleep(1000);
  41         mic_send_intr(mdev, 3);
  42         msleep(1000);
  43
  44         return 0;
  45 }
  46
  47 DEFINE_SHOW_ATTRIBUTE(mic_intr);
  48
  49 /**
  50  * mic_create_card_debug_dir - Initialize MIC debugfs entries.
  51  */
  52 void __init mic_create_card_debug_dir(struct mic_driver *mdrv)
  53 {
  54         if (!mic_dbg)
  55                 return;
  56
  57         mdrv->dbg_dir = debugfs_create_dir(mdrv->name, mic_dbg);
  58
  59         debugfs_create_file("intr_test", 0444, mdrv->dbg_dir, mdrv,
  60                             &mic_intr_fops);
  61 }
  62
  63 /**
  64  * mic_delete_card_debug_dir - Uninitialize MIC debugfs entries.
  65  */
  66 void mic_delete_card_debug_dir(struct mic_driver *mdrv)
  67 {
  68         debugfs_remove_recursive(mdrv->dbg_dir);
  69 }
  70
  71 /**
  72  * mic_init_card_debugfs - Initialize global debugfs entry.
  73  */
  74 void __init mic_init_card_debugfs(void)
  75 {
  76         mic_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
  77 }
  78
  79 /**
  80  * mic_exit_card_debugfs - Uninitialize global debugfs entry
  81  */
  82 void mic_exit_card_debugfs(void)
  83 {
  84         debugfs_remove(mic_dbg);
  85 }