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#include "gem.h"
#include "gem_msm.h"
struct gem_driver_lookup
{
const char name[16];
struct gem_driver *driver;
};
static struct gem_driver_lookup drivers[] = {
{
.name = "msm_drm",
.driver = &gem_msm_driver
}
};
static inline size_t num_drivers()
{
return ARRAY_SIZE(drivers);
}
struct gem_driver *gem_get_driver(int drm_fd)
{
char name[16] = {0};
drm_version_t version = {};
version.name_len = sizeof(name);
version.name = name;
if (drmIoctl(drm_fd, DRM_IOCTL_VERSION, &version))
{
return NULL;
}
for (struct gem_driver_lookup *di = drivers;
di - drivers < num_drivers();
++di)
{
if (!strncmp(name, di->name, sizeof(name)))
{
return di->driver;
}
}
return NULL;
}
int gem_size(int drm_fd, size_t *size, uint32_t gem_handle)
{
struct drm_gem_flink drm_gem_flink_arg = {
.handle = gem_handle,
.name = 0
};
if (drmIoctl(drm_fd,
DRM_IOCTL_GEM_FLINK,
&drm_gem_flink_arg))
{
return -1;
}
struct drm_gem_open drm_gem_open_arg = {
.name = drm_gem_flink_arg.name,
.handle = 0,
.size = 0
};
if (drmIoctl(drm_fd,
DRM_IOCTL_GEM_OPEN,
&drm_gem_open_arg))
{
return -1;
}
*size = drm_gem_open_arg.size;
if (drm_gem_open_arg.handle != gem_handle)
{
gem_release_handle(drm_fd, drm_gem_open_arg.handle);
}
return 0;
}
void gem_release_handle(int drm_fd, uint32_t gem_handle)
{
struct drm_gem_close drm_gem_close_arg = {
.handle = gem_handle,
.pad = 0
};
drmIoctl(drm_fd, DRM_IOCTL_GEM_CLOSE, &drm_gem_close_arg);
}
int drm_fb_for_gem_handle(int drm_fd, uint32_t *fb_id, uint32_t gem_handle,
const struct fb_configuration *fb_config)
{
struct drm_mode_fb_cmd2 drm_mode_addfb2_arg = {
.fb_id = 0,
.width = fb_config->width,
.height = fb_config->height,
.pixel_format = fb_config->pixel_format,
.flags = DRM_MODE_FB_MODIFIERS,
.handles = { gem_handle, 0, 0, 0 },
.pitches = { fb_config->width * fb_config->pixel_size, 0, 0, 0 },
.offsets = { 0, 0, 0, 0 },
.modifier = { 0 }
};
if (drmIoctl(drm_fd, DRM_IOCTL_MODE_ADDFB2, &drm_mode_addfb2_arg))
{
return -1;
}
*fb_id = drm_mode_addfb2_arg.fb_id;
return 0;
}
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