// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2012-2013 Avionic Design GmbH * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved. * * Based on the KMS/FB DMA helpers *   Copyright (C) 2012 Analog Devices Inc. */ #include <linux/console.h>#include <linux/fb.h>#include <linux/vmalloc.h> #include <drm/drm_drv.h>#include <drm/drm_crtc_helper.h>#include <drm/drm_fb_helper.h>#include <drm/drm_fourcc.h>#include <drm/drm_framebuffer.h>#include <drm/drm_gem_framebuffer_helper.h>#include <drm/drm_modeset_helper.h> #include "drm.h"#include "gem.h" static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma){	struct drm_fb_helper *helper = info->par;	struct tegra_bo *bo;	int err; 	bo = tegra_fb_get_plane(helper->fb, 0); 	err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma);	if (err < 0)		return err; 	return __tegra_gem_mmap(&bo->gem, vma);} static void tegra_fbdev_fb_destroy(struct fb_info *info){	struct drm_fb_helper *helper = info->par;	struct tegra_bo *bo = tegra_fb_get_plane(helper->fb, 0); 	drm_fb_helper_fini(helper); 	/* Undo the special mapping we made in fbdev probe. */	if (bo->pages) {		vunmap(bo->vaddr);		bo->vaddr = NULL;	} 	drm_client_buffer_delete(helper->buffer);	drm_client_release(&helper->client);} static const struct fb_ops tegra_fb_ops = {	.owner = THIS_MODULE,	__FB_DEFAULT_DMAMEM_OPS_RDWR,	DRM_FB_HELPER_DEFAULT_OPS,	__FB_DEFAULT_DMAMEM_OPS_DRAW,	.fb_mmap = tegra_fb_mmap,	.fb_destroy = tegra_fbdev_fb_destroy,}; static const struct drm_fb_helper_funcs tegra_fbdev_helper_funcs = {}; int tegra_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper,				   struct drm_fb_helper_surface_size *sizes){	struct drm_client_dev *client = &helper->client;	struct drm_device *drm = client->dev;	struct drm_file *file = client->file;	struct tegra_drm *tegra = drm->dev_private;	struct fb_info *info = helper->info;	u32 fourcc, pitch;	u64 size;	const struct drm_format_info *format;	struct tegra_bo *bo;	struct drm_gem_object *gem;	u32 handle;	struct drm_client_buffer *buffer;	int err; 	fourcc = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);	format = drm_get_format_info(drm, fourcc, DRM_FORMAT_MOD_LINEAR);	pitch = round_up(drm_format_info_min_pitch(format, 0, sizes->surface_width),			 tegra->pitch_align);	size = ALIGN(pitch * sizes->surface_height, PAGE_SIZE); 	bo = tegra_bo_create(drm, size, 0);	if (IS_ERR(bo))		return PTR_ERR(bo);	gem = &bo->gem; 	err = drm_gem_handle_create(file, gem, &handle);	if (err)		goto err_drm_gem_object_put; 	buffer = drm_client_buffer_create(client, sizes->surface_width, sizes->surface_height,					  fourcc, handle, pitch);	if (IS_ERR(buffer)) {		err = PTR_ERR(buffer);		goto err_drm_gem_handle_delete;	} 	helper->funcs = &tegra_fbdev_helper_funcs;	helper->buffer = buffer;	helper->fb = buffer->fb; 	info->fbops = &tegra_fb_ops; 	drm_fb_helper_fill_info(info, helper, sizes); 	if (bo->pages) {		bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,				 pgprot_writecombine(PAGE_KERNEL));		if (!bo->vaddr) {			dev_err(drm->dev, "failed to vmap() framebuffer\n");			err = -ENOMEM;			goto err_drm_client_buffer_delete;		}	} 	info->flags |= FBINFO_VIRTFB;	info->screen_buffer = bo->vaddr;	info->screen_size = gem->size;	info->fix.smem_start = (unsigned long)(bo->iova);	info->fix.smem_len = gem->size; 	/* The handle is only needed for creating the framebuffer. */	drm_gem_handle_delete(file, handle); 	/* The framebuffer still holds a reference on the GEM object. */	drm_gem_object_put(gem); 	return 0; err_drm_client_buffer_delete:	drm_client_buffer_delete(buffer);err_drm_gem_handle_delete:	drm_gem_handle_delete(file, handle);err_drm_gem_object_put:	drm_gem_object_put(gem);	return err;}