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// SPDX-License-Identifier: GPL-2.0-or-later
/* Hisilicon Hibmc SoC drm driver
*
* Based on the bochs drm driver.
*
* Copyright (c) 2016 Huawei Limited.
*
* Author:
* Rongrong Zou <zourongrong@huawei.com>
* Rongrong Zou <zourongrong@gmail.com>
* Jianhua Li <lijianhua@huawei.com>
*/
#include <linux/pci.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_vram_helper.h>
#include <drm/drm_print.h>
#include "hibmc_drm_drv.h"
int hibmc_mm_init(struct hibmc_drm_private *hibmc)
{
struct drm_vram_mm *vmm;
int ret;
struct drm_device *dev = hibmc->dev;
vmm = drm_vram_helper_alloc_mm(dev,
pci_resource_start(dev->pdev, 0),
hibmc->fb_size);
if (IS_ERR(vmm)) {
ret = PTR_ERR(vmm);
DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
return ret;
}
return 0;
}
void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
{
if (!hibmc->dev->vram_mm)
return;
drm_vram_helper_release_mm(hibmc->dev);
}
int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
struct drm_gem_object **obj)
{
struct drm_gem_vram_object *gbo;
int ret;
*obj = NULL;
size = roundup(size, PAGE_SIZE);
if (size == 0)
return -EINVAL;
gbo = drm_gem_vram_create(dev, &dev->vram_mm->bdev, size, 0, false);
if (IS_ERR(gbo)) {
ret = PTR_ERR(gbo);
if (ret != -ERESTARTSYS)
DRM_ERROR("failed to allocate GEM object: %d\n", ret);
return ret;
}
*obj = &gbo->bo.base;
return 0;
}
int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct drm_gem_object *gobj;
u32 handle;
int ret;
args->pitch = ALIGN(args->width * DIV_ROUND_UP(args->bpp, 8), 16);
args->size = args->pitch * args->height;
ret = hibmc_gem_create(dev, args->size, false,
&gobj);
if (ret) {
DRM_ERROR("failed to create GEM object: %d\n", ret);
return ret;
}
ret = drm_gem_handle_create(file, gobj, &handle);
drm_gem_object_put_unlocked(gobj);
if (ret) {
DRM_ERROR("failed to unreference GEM object: %d\n", ret);
return ret;
}
args->handle = handle;
return 0;
}
const struct drm_mode_config_funcs hibmc_mode_funcs = {
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
.fb_create = drm_gem_fb_create,
};
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