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// SPDX-License-Identifier: MIT
/*
* Copyright (C) 2013-2017 Oracle Corporation
* This file is based on ast_fb.c
* Copyright 2012 Red Hat Inc.
* Authors: Dave Airlie <airlied@redhat.com>
* Michael Thayer <michael.thayer@oracle.com,
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/sysrq.h>
#include <linux/tty.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include "vbox_drv.h"
#include "vboxvideo.h"
#ifdef CONFIG_DRM_KMS_FB_HELPER
static struct fb_deferred_io vbox_defio = {
.delay = HZ / 30,
.deferred_io = drm_fb_helper_deferred_io,
};
#endif
static struct fb_ops vboxfb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_fillrect = drm_fb_helper_sys_fillrect,
.fb_copyarea = drm_fb_helper_sys_copyarea,
.fb_imageblit = drm_fb_helper_sys_imageblit,
};
int vboxfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct vbox_private *vbox =
container_of(helper, struct vbox_private, fb_helper);
struct pci_dev *pdev = vbox->ddev.pdev;
struct drm_mode_fb_cmd2 mode_cmd;
struct drm_framebuffer *fb;
struct fb_info *info;
struct drm_gem_object *gobj;
struct drm_gem_vram_object *gbo;
int size, ret;
s64 gpu_addr;
u32 pitch;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
pitch = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
mode_cmd.pitches[0] = pitch;
size = pitch * mode_cmd.height;
ret = vbox_gem_create(vbox, size, true, &gobj);
if (ret) {
DRM_ERROR("failed to create fbcon backing object %d\n", ret);
return ret;
}
ret = vbox_framebuffer_init(vbox, &vbox->afb, &mode_cmd, gobj);
if (ret)
return ret;
gbo = drm_gem_vram_of_gem(gobj);
ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
if (ret)
return ret;
info = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(info))
return PTR_ERR(info);
info->screen_size = size;
info->screen_base = (char __iomem *)drm_gem_vram_kmap(gbo, true, NULL);
if (IS_ERR(info->screen_base))
return PTR_ERR(info->screen_base);
fb = &vbox->afb.base;
helper->fb = fb;
info->fbops = &vboxfb_ops;
/*
* This seems to be done for safety checking that the framebuffer
* is not registered twice by different drivers.
*/
info->apertures->ranges[0].base = pci_resource_start(pdev, 0);
info->apertures->ranges[0].size = pci_resource_len(pdev, 0);
drm_fb_helper_fill_info(info, helper, sizes);
gpu_addr = drm_gem_vram_offset(gbo);
if (gpu_addr < 0)
return (int)gpu_addr;
info->fix.smem_start = info->apertures->ranges[0].base + gpu_addr;
info->fix.smem_len = vbox->available_vram_size - gpu_addr;
#ifdef CONFIG_DRM_KMS_FB_HELPER
info->fbdefio = &vbox_defio;
fb_deferred_io_init(info);
#endif
info->pixmap.flags = FB_PIXMAP_SYSTEM;
DRM_DEBUG_KMS("allocated %dx%d\n", fb->width, fb->height);
return 0;
}
void vbox_fbdev_fini(struct vbox_private *vbox)
{
struct vbox_framebuffer *afb = &vbox->afb;
#ifdef CONFIG_DRM_KMS_FB_HELPER
if (vbox->fb_helper.fbdev && vbox->fb_helper.fbdev->fbdefio)
fb_deferred_io_cleanup(vbox->fb_helper.fbdev);
#endif
drm_fb_helper_unregister_fbi(&vbox->fb_helper);
if (afb->obj) {
struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(afb->obj);
drm_gem_vram_kunmap(gbo);
drm_gem_vram_unpin(gbo);
drm_gem_object_put_unlocked(afb->obj);
afb->obj = NULL;
}
drm_fb_helper_fini(&vbox->fb_helper);
drm_framebuffer_unregister_private(&afb->base);
drm_framebuffer_cleanup(&afb->base);
}
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