From 8cbf32f110d47136d853ee88b74103445732a62e Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Tue, 8 May 2018 11:43:34 +0200
Subject: Create surface scaffold

---
 Kbuild    |  2 +-
 char.c    | 39 +++++++++++++++++++++++++++++++++++++--
 surface.c |  8 ++++++++
 surface.h |  8 ++++++++
 4 files changed, 54 insertions(+), 3 deletions(-)
 create mode 100644 surface.c
 create mode 100644 surface.h

diff --git a/Kbuild b/Kbuild
index fdebf0f..0fa0a82 100644
--- a/Kbuild
+++ b/Kbuild
@@ -1,2 +1,2 @@
 obj-m := harddoom.o
-harddoom-objs := harddoom_main.o pci.o char.o harddoomdev.o
+harddoom-objs := harddoom_main.o pci.o char.o harddoomdev.o surface.o
diff --git a/char.c b/char.c
index db8ffcc..881c3d0 100644
--- a/char.c
+++ b/char.c
@@ -4,8 +4,10 @@
 #include <linux/device.h>
 #include <linux/fs.h>
 
+#include "doomdev.h"
 #include "util.h"
 #include "pci.h"
+#include "surface.h"
 
 #define DOOMDEV_COUNT 256
 #define DOOMDEV_NAME "doom"
@@ -14,16 +16,49 @@ dev_t first;
 int major;
 int next_minor = 0;
 
-long doom_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+long doom_create_surface(struct file *filp, unsigned long arg)
+{
+	struct doomdev_ioctl_create_surface *params;
+	params = (struct doomdev_ioctl_create_surface *)arg;
+	return new_surface(params);
+}
+
+long doom_create_texture(struct file *filp, unsigned long arg)
 {
 	return -1;
 }
 
-int doom_open(struct inode *inode, struct file *filp)
+long doom_create_flat(struct file *filp, unsigned long arg)
 {
 	return -1;
 }
 
+long doom_create_colormaps(struct file *filp, unsigned long arg)
+{
+	return -1;
+}
+
+long doom_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+	case DOOMDEV_IOCTL_CREATE_SURFACE:
+		return doom_create_surface(filp, arg);
+	case DOOMDEV_IOCTL_CREATE_TEXTURE:
+		return doom_create_texture(filp, arg);
+	case DOOMDEV_IOCTL_CREATE_FLAT:
+		return doom_create_flat(filp, arg);
+	case DOOMDEV_IOCTL_CREATE_COLORMAPS:
+		return doom_create_colormaps(filp, arg);
+	default:
+		return -EINVAL;
+	}
+}
+
+int doom_open(struct inode *inode, struct file *filp)
+{
+	return 0;
+}
+
 struct file_operations doomdev_fops = {
 	.owner = THIS_MODULE,
 	.unlocked_ioctl = doom_ioctl,
diff --git a/surface.c b/surface.c
new file mode 100644
index 0000000..3c24871
--- /dev/null
+++ b/surface.c
@@ -0,0 +1,8 @@
+#include <linux/fs.h>
+
+#include "surface.h"
+
+int new_surface(struct doomdev_ioctl_create_surface *params)
+{
+	return -1;
+}
diff --git a/surface.h b/surface.h
new file mode 100644
index 0000000..db9c80c
--- /dev/null
+++ b/surface.h
@@ -0,0 +1,8 @@
+#ifndef SURFACE_H
+#define SURFACE_H
+
+#include "doomdev.h"
+
+int new_surface(struct doomdev_ioctl_create_surface *params);
+
+#endif
-- 
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