From 2915635a0a4d03fe442399a679a42a92b33c8b99 Mon Sep 17 00:00:00 2001
From: Mateusz Krawczuk <m.krawczuk@samsung.com>
Date: Fri, 12 Jun 2015 20:09:25 +0200
Subject: v4l2-mfc-example: Add and refactor gem functions

 Gem function related moved to gem.c and gem.h
 It should make code more clean and obviously.

Signed-off-by: Mateusz Krawczuk <m.krawczuk@samsung.com>
---
 v4l2-mfc-example/gem.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 v4l2-mfc-example/gem.c

(limited to 'v4l2-mfc-example/gem.c')

diff --git a/v4l2-mfc-example/gem.c b/v4l2-mfc-example/gem.c
new file mode 100644
index 0000000..a6d6516
--- /dev/null
+++ b/v4l2-mfc-example/gem.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <linux/videodev2.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "fimc.h"
+#include <drm/exynos_drm.h>
+
+#include <errno.h>
+#include <drm/drm_fourcc.h>
+#include "gem.h"
+
+int exynos_gem_create(int fd, struct drm_exynos_gem_create *gem)
+{
+	int ret;
+    if (!gem) {
+        fprintf(stderr,"%s: %d - GEM object is null\n",__func__,__LINE__);
+        return -EINVAL;
+    }
+
+    ret = ioctl(fd, DRM_IOCTL_EXYNOS_GEM_CREATE, gem)  ;
+    if(ret){
+        fprintf(stderr,"%s: %d - Failed to create GEM buffer\n %d %s",__func__,__LINE__,ret,strerror(errno));
+        return -EINVAL;
+
+    }
+    return 0;
+}
+
+int exynos_gem_map_offset(int fd, struct drm_mode_map_dumb *map_off)
+{
+
+    if (ioctl(fd, DRM_IOCTL_MODE_MAP_DUMB, map_off) < 0) {
+	 fprintf(stderr,"%s: %d - Failed to get buffer offset\n",__func__,__LINE__);
+        return -EINVAL;
+    }
+    return 0;
+}
+int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap)
+{
+    int ret;
+    void *map;
+    struct drm_mode_map_dumb arg;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.handle = in_mmap->handle;
+
+    ret = ioctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
+    if (ret) {
+        fprintf(stderr, "%s: %d - failed to map dumb buffer: %s\n",
+                __func__, __LINE__, strerror(errno));
+        return ret;
+    }
+
+    in_mmap->offset = arg.offset;
+
+    map = mmap(NULL, (size_t)in_mmap->size, PROT_READ | PROT_WRITE,
+               MAP_SHARED, fd, (off_t)arg.offset);
+    if (map == MAP_FAILED) {
+        fprintf(stderr, "%s: %d - failed to mmap buffer: %s\n",
+                __func__, __LINE__, strerror(errno));
+        return -EFAULT;
+    }
+
+    in_mmap->addr = map;
+
+    return 0;
+}
+
+int exynos_gem_close(int fd, struct drm_gem_close *gem_close)
+{
+    int ret = 0;
+
+    ret = ioctl(fd, DRM_IOCTL_GEM_CLOSE, gem_close);
+    if (ret < 0)
+        fprintf(stderr, "%s: %d - failed to close: %s\n", __func__, __LINE__,  strerror(-ret));
+    return ret;
+}
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