From: CK Hu ck.hu@mediatek.com
Add an interface to allocate MediaTek GEM buffers, allow the IOCTLs to be used by render nodes. This patch also sets the RENDER driver feature.
TODO: Drop this path after we change all the usages of this ioctl to DMA_HEAP_IOCTL_ALLOC in the user sapce.
Signed-off-by: CK Hu ck.hu@mediatek.com Signed-off-by: Hsiao Chien Sung shawn.sung@mediatek.corp-partner.google.com --- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 13 +++++++- drivers/gpu/drm/mediatek/mtk_gem.c | 31 +++++++++++++++++ drivers/gpu/drm/mediatek/mtk_gem.h | 8 +++++ include/uapi/drm/mediatek_drm.h | 46 ++++++++++++++++++++++++++ 4 files changed, 97 insertions(+), 1 deletion(-) create mode 100644 include/uapi/drm/mediatek_drm.h
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index b5f605751b0a..11e1555e9aa4 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -23,6 +23,7 @@ #include <drm/drm_of.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h> +#include <drm/mediatek_drm.h>
#include "mtk_crtc.h" #include "mtk_ddp_comp.h" @@ -570,6 +571,11 @@ static void mtk_drm_kms_deinit(struct drm_device *drm) component_unbind_all(drm->dev, drm); }
+static const struct drm_ioctl_desc mtk_ioctls[] = { + DRM_IOCTL_DEF_DRV(MTK_GEM_CREATE, mtk_gem_create_ioctl, + DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW), +}; + DEFINE_DRM_GEM_FOPS(mtk_drm_fops);
/* @@ -585,12 +591,17 @@ static struct drm_gem_object *mtk_gem_prime_import(struct drm_device *dev, }
static const struct drm_driver mtk_drm_driver = { - .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC | + DRIVER_RENDER,
.dumb_create = mtk_gem_dumb_create,
.gem_prime_import = mtk_gem_prime_import, .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table, + + .ioctls = mtk_ioctls, + .num_ioctls = ARRAY_SIZE(mtk_ioctls), + .fops = &mtk_drm_fops,
.name = DRIVER_NAME, diff --git a/drivers/gpu/drm/mediatek/mtk_gem.c b/drivers/gpu/drm/mediatek/mtk_gem.c index a172456d1d7b..91f6cfa3f1b7 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_gem.c @@ -5,9 +5,11 @@
#include <linux/dma-buf.h> #include <linux/vmalloc.h> +#include <drm/mediatek_drm.h>
#include <drm/drm.h> #include <drm/drm_device.h> +#include <drm/drm_drv.h> #include <drm/drm_gem.h> #include <drm/drm_gem_dma_helper.h> #include <drm/drm_prime.h> @@ -286,3 +288,32 @@ void mtk_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map) mtk_gem->kvaddr = NULL; kfree(mtk_gem->pages); } + +int mtk_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct mtk_gem_obj *mtk_gem; + struct drm_mtk_gem_create *args = data; + int ret; + + mtk_gem = mtk_gem_create(dev, args->size, false); + if (IS_ERR(mtk_gem)) + return PTR_ERR(mtk_gem); + + /* + * allocate a id of idr table where the obj is registered + * and handle has the id what user can see. + */ + ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle); + if (ret) + goto err_handle_create; + + /* drop reference from allocate - handle holds it now. */ + drm_gem_object_put(&mtk_gem->base); + + return 0; + +err_handle_create: + mtk_gem_free_object(&mtk_gem->base); + return ret; +} diff --git a/drivers/gpu/drm/mediatek/mtk_gem.h b/drivers/gpu/drm/mediatek/mtk_gem.h index 66e5f154f698..b71a7e7b405a 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.h +++ b/drivers/gpu/drm/mediatek/mtk_gem.h @@ -45,4 +45,12 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, int mtk_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map); void mtk_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
+/* + * request gem object creation and buffer allocation as the size + * that it is calculated with framebuffer information such as width, + * height and bpp. + */ +int mtk_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + #endif diff --git a/include/uapi/drm/mediatek_drm.h b/include/uapi/drm/mediatek_drm.h new file mode 100644 index 000000000000..821f7a732365 --- /dev/null +++ b/include/uapi/drm/mediatek_drm.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ +/* + * Copyright (c) 2015 MediaTek Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _UAPI_MEDIATEK_DRM_H +#define _UAPI_MEDIATEK_DRM_H + +#include <drm/drm.h> + +#ifdef __KERNEL__ +#include <linux/types.h> +#else +#include <stdint.h> +#endif + +/** + * User-desired buffer creation information structure. + * + * @size: user-desired memory allocation size. + * - this size value would be page-aligned internally. + * @flags: user request for setting memory type or cache attributes. + * @handle: returned a handle to created gem object. + * - this handle will be set by gem module of kernel side. + */ +struct drm_mtk_gem_create { + uint64_t size; + uint32_t flags; + uint32_t handle; +}; + +#define DRM_MTK_GEM_CREATE 0x00 + +#define DRM_IOCTL_MTK_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + \ + DRM_MTK_GEM_CREATE, struct drm_mtk_gem_create) + +#endif /* _UAPI_MEDIATEK_DRM_H */