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>

3 files changed, 126 insertions, 1 deletions

diff --git a/v4l2-mfc-example/Makefile b/v4l2-mfc-example/Makefile
index 7056683..64294a8 100644
--- a/v4l2-mfc-example/Makefile
+++ b/v4l2-mfc-example/Makefile
@@ -48,7 +48,7 @@ INCLUDES = $(KERNELHEADERS) $(DRMHEADERS)
 
 #-I$(TARGETROOT)/usr/include/linux
 
-SOURCES = main.c fileops.c args.c parser.c fb.c fimc.c mfc.c queue.c drm.c
+SOURCES = main.c fileops.c args.c parser.c fb.c fimc.c mfc.c queue.c drm.c gem.c
 OBJECTS := $(SOURCES:.c=.o)
 EXEC = v4l2_decode
 CFLAGS = -Wall -g -DS5PC1XX_FIMC -lm
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;
+}
\ No newline at end of file
diff --git a/v4l2-mfc-example/gem.h b/v4l2-mfc-example/gem.h
new file mode 100644
index 0000000..8b92b48
--- /dev/null
+++ b/v4l2-mfc-example/gem.h
@@ -0,0 +1,40 @@
+/*
+ * V4L2 Codec decoding example application
+ * Kamil Debski <k.debski@samsung.com>
+ * Mateusz Krawczuk <m.krawczuk@samsung.com>
+ * 
+ * GEM operations header file
+ *
+ * Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+#ifndef INCLUDE_GEM_H
+#define INCLUDE_GEM_H
+
+#include "common.h"
+#include <drm/exynos_drm.h>
+
+struct exynos_gem_mmap_data {
+    uint32_t handle;
+    uint64_t size;
+    uint64_t offset;
+    void *addr;
+};
+
+int exynos_gem_create(int fd, struct drm_exynos_gem_create *gem);
+int exynos_gem_map_offset(int fd, struct drm_mode_map_dumb *map_off);
+int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap);
+int exynos_gem_close(int fd, struct drm_gem_close *gem_close);
+#endif /* INCLUDE_IPP_H */