From 5ea84cb7b5e33ce5b62afe518e6b5a3be0ae92f0 Mon Sep 17 00:00:00 2001
From: Alex Forencich <alex@alexforencich.com>
Date: Tue, 23 Jul 2019 18:43:04 -0700
Subject: [PATCH] Add info ioctl

---
 modules/mqnic/mqnic_dev.c   | 30 ++++++++++++++++++++++
 modules/mqnic/mqnic_ioctl.h | 51 +++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 modules/mqnic/mqnic_ioctl.h

diff --git a/modules/mqnic/mqnic_dev.c b/modules/mqnic/mqnic_dev.c
index 62fce5d85..0cb7e588d 100644
--- a/modules/mqnic/mqnic_dev.c
+++ b/modules/mqnic/mqnic_dev.c
@@ -32,6 +32,7 @@ either expressed or implied, of The Regents of the University of California.
 */
 
 #include "mqnic.h"
+#include "mqnic_ioctl.h"
 
 static int mqnic_open(struct inode *inode, struct file *filp)
 {
@@ -103,9 +104,38 @@ fail_invalid_offset:
     return -EINVAL;
 }
 
+static long mqnic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+    struct mqnic_dev *mqnic = filp->private_data;
+
+    if (_IOC_TYPE(cmd) != MQNIC_IOCTL_TYPE)
+        return -ENOTTY;
+
+    switch (cmd) {
+    case MQNIC_IOCTL_INFO:
+        {
+            struct mqnic_ioctl_info ctl;
+
+            ctl.fw_id = mqnic->fw_id;
+            ctl.fw_ver = mqnic->fw_ver;
+            ctl.board_id = mqnic->board_id;
+            ctl.board_ver = mqnic->board_ver;
+            ctl.regs_size = mqnic->hw_regs_size;
+
+            if (copy_to_user((void *)arg, &ctl, sizeof(ctl)) != 0)
+                return -EFAULT;
+
+            return 0;
+        }
+    default:
+        return -ENOTTY;
+    }
+}
+
 const struct file_operations mqnic_fops = {
     .owner          = THIS_MODULE,
     .open           = mqnic_open,
     .release        = mqnic_release,
     .mmap           = mqnic_mmap,
+    .unlocked_ioctl = mqnic_ioctl,
 };
diff --git a/modules/mqnic/mqnic_ioctl.h b/modules/mqnic/mqnic_ioctl.h
new file mode 100644
index 000000000..d9828692c
--- /dev/null
+++ b/modules/mqnic/mqnic_ioctl.h
@@ -0,0 +1,51 @@
+/*
+
+Copyright 2019, The Regents of the University of California.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS OF THE UNIVERSITY OF CALIFORNIA ''AS
+IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE REGENTS OF THE UNIVERSITY OF CALIFORNIA OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+OF SUCH DAMAGE.
+
+The views and conclusions contained in the software and documentation are those
+of the authors and should not be interpreted as representing official policies,
+either expressed or implied, of The Regents of the University of California.
+
+*/
+
+#ifndef MQNIC_IOCTL_H
+#define MQNIC_IOCTL_H
+
+#include <linux/types.h>
+
+#define MQNIC_IOCTL_TYPE 0x88
+
+#define MQNIC_IOCTL_INFO _IOR(MQNIC_IOCTL_TYPE, 0xf0, struct mqnic_ioctl_info)
+
+struct mqnic_ioctl_info {
+    __u32 fw_id;
+    __u32 fw_ver;
+    __u32 board_id;
+    __u32 board_ver;
+    size_t regs_size;
+};
+
+#endif /* MQNIC_IOCTL_H */