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/* exynos.c
*
* Copyright 2009 Samsung Electronics Co., Ltd.
* Authors:
* SooChan Lim <sc1.lim@samsung.com>
* Sangjin LEE <lsj119@samsung.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define _FILE_OFFSET_BITS 64
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal.h"
#include <sys/mman.h>
#include <sys/ioctl.h>
#include "xf86drm.h"
#include "exynos_drm.h"
struct exynos_bo
{
struct kms_bo base;
unsigned map_count;
};
static int
exynos_get_prop(struct kms_driver *kms, unsigned key, unsigned *out)
{
switch (key) {
case KMS_BO_TYPE:
*out = KMS_BO_TYPE_SCANOUT_X8R8G8B8 | KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
break;
default:
return -EINVAL;
}
return 0;
}
static int
exynos_destroy(struct kms_driver *kms)
{
free(kms);
return 0;
}
static int
exynos_bo_create(struct kms_driver *kms,
const unsigned width, const unsigned height,
const enum kms_bo_type type, const unsigned *attr,
struct kms_bo **out)
{
struct drm_exynos_gem_create arg;
unsigned size, pitch;
struct exynos_bo *bo;
int i, ret;
for (i = 0; attr[i]; i += 2) {
switch (attr[i]) {
case KMS_WIDTH:
case KMS_HEIGHT:
case KMS_BO_TYPE:
break;
default:
return -EINVAL;
}
}
bo = calloc(1, sizeof(*bo));
if (!bo)
return -ENOMEM;
if (type == KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8) {
pitch = 64 * 4;
size = 64 * 64 * 4;
} else if (type == KMS_BO_TYPE_SCANOUT_X8R8G8B8) {
pitch = width * 4;
pitch = (pitch + 512 - 1) & ~(512 - 1);
size = pitch * ((height + 4 - 1) & ~(4 - 1));
} else {
return -EINVAL;
}
memset(&arg, 0, sizeof(arg));
arg.size = size;
ret = drmCommandWriteRead(kms->fd, DRM_EXYNOS_GEM_CREATE, &arg, sizeof(arg));
if (ret)
goto err_free;
bo->base.kms = kms;
bo->base.handle = arg.handle;
bo->base.size = size;
bo->base.pitch = pitch;
*out = &bo->base;
return 0;
err_free:
free(bo);
return ret;
}
static int
exynos_bo_get_prop(struct kms_bo *bo, unsigned key, unsigned *out)
{
switch (key) {
default:
return -EINVAL;
}
}
static int
exynos_bo_map(struct kms_bo *_bo, void **out)
{
struct exynos_bo *bo = (struct exynos_bo *)_bo;
struct drm_exynos_gem_map_off arg;
void *map = NULL;
int ret;
if (bo->base.ptr) {
bo->map_count++;
*out = bo->base.ptr;
return 0;
}
memset(&arg, 0, sizeof(arg));
arg.handle = bo->base.handle;
ret = drmCommandWriteRead(bo->base.kms->fd, DRM_EXYNOS_GEM_MAP_OFFSET, &arg, sizeof(arg));
if (ret)
return ret;
map = mmap(0, bo->base.size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->base.kms->fd, arg.offset);
if (map == MAP_FAILED)
return -errno;
bo->base.ptr = map;
bo->map_count++;
*out = bo->base.ptr;
return 0;
}
static int
exynos_bo_unmap(struct kms_bo *_bo)
{
struct exynos_bo *bo = (struct exynos_bo *)_bo;
bo->map_count--;
return 0;
}
static int
exynos_bo_destroy(struct kms_bo *_bo)
{
struct exynos_bo *bo = (struct exynos_bo *)_bo;
struct drm_gem_close arg;
int ret;
if (bo->base.ptr) {
/* XXX Sanity check map_count */
munmap(bo->base.ptr, bo->base.size);
bo->base.ptr = NULL;
}
memset(&arg, 0, sizeof(arg));
arg.handle = bo->base.handle;
ret = drmIoctl(bo->base.kms->fd, DRM_IOCTL_GEM_CLOSE, &arg);
if (ret)
return -errno;
free(bo);
return 0;
}
int
exynos_create(int fd, struct kms_driver **out)
{
struct kms_driver *kms;
kms = calloc(1, sizeof(*kms));
if (!kms)
return -ENOMEM;
kms->fd = fd;
kms->bo_create = exynos_bo_create;
kms->bo_map = exynos_bo_map;
kms->bo_unmap = exynos_bo_unmap;
kms->bo_get_prop = exynos_bo_get_prop;
kms->bo_destroy = exynos_bo_destroy;
kms->get_prop = exynos_get_prop;
kms->destroy = exynos_destroy;
*out = kms;
return 0;
}
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