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#define LOG_TAG "GRALLOC-GEM"
#include <cutils/log.h>
#include <cutils/atomic.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "gralloc_mod.h"
#include "gralloc_gem.h"
#define unlikely(x) __builtin_expect(!!(x), 0)
#define DRM_PATH "/dev/dri/card0"
static int32_t drm_gem_pid = 0;
static int
drm_gem_get_pid(void)
{
if (unlikely(!drm_gem_pid))
android_atomic_write((int32_t) getpid(), &drm_gem_pid);
return drm_gem_pid;
}
static int
drm_gem_init_locked(struct drm_module_t *drm)
{
int ret;
if (drm->fd >= 0)
return 0;
drm->fd = open(DRM_PATH, O_RDWR);
if (drm->fd < 0) {
LOGE("failed to open %s", DRM_PATH);
return -EINVAL;
}
return 0;
}
int
drm_gem_init(struct drm_module_t *drm)
{
int ret;
pthread_mutex_lock(&drm->mutex);
ret = drm_gem_init_locked(drm);
pthread_mutex_unlock(&drm->mutex);
return ret;
}
int
drm_gem_get_magic(struct drm_module_t *drm, int32_t *magic)
{
int ret;
ret = drm_gem_init(drm);
if (ret)
return ret;
return drmGetMagic(drm->fd, (drm_magic_t *) magic);
}
int
drm_gem_auth_magic(struct drm_module_t *drm, int32_t magic)
{
int ret;
ret = drm_gem_init(drm);
if (ret)
return ret;
return drmAuthMagic(drm->fd, (drm_magic_t) magic);
}
struct drm_bo_t *
drm_gem_create_bo(int width, int height, int format, int usage)
{
struct drm_bo_t *bo;
bo = calloc(1, sizeof(*bo));
if (!bo)
return NULL;
bo->base.version = sizeof(bo->base);
bo->base.numInts = DRM_HANDLE_NUM_INTS;
bo->base.numFds = DRM_HANDLE_NUM_FDS;
bo->magic = DRM_HANDLE_MAGIC;
bo->width = width;
bo->height = height;
bo->format = format;
bo->usage = usage;
bo->pid = drm_gem_get_pid();
return bo;
}
struct drm_bo_t *
drm_gem_validate(buffer_handle_t handle)
{
struct drm_bo_t *bo = drm_gem_get(handle);
if (bo && unlikely(bo->pid != drm_gem_pid)) {
bo->pid = drm_gem_get_pid();
bo->fb_handle = 0;
bo->fb_id = 0;
bo->data = 0;
}
return bo;
}
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