diff options
Diffstat (limited to 'drivers/gpu/drm/vboxvideo/vbox_fb.c')
| -rw-r--r-- | drivers/gpu/drm/vboxvideo/vbox_fb.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vboxvideo/vbox_fb.c b/drivers/gpu/drm/vboxvideo/vbox_fb.c new file mode 100644 index 000000000000..b724fe7c0c30 --- /dev/null +++ b/drivers/gpu/drm/vboxvideo/vbox_fb.c @@ -0,0 +1,149 @@ +// 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 vbox_bo *bo; + int size, ret; + u64 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; + + bo = gem_to_vbox_bo(gobj); + + ret = vbox_bo_pin(bo, TTM_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 *)vbox_bo_kmap(bo); + 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 = vbox_bo_gpu_offset(bo); + 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 vbox_bo *bo = gem_to_vbox_bo(afb->obj); + + vbox_bo_kunmap(bo); + + if (bo->pin_count) + vbox_bo_unpin(bo); + + 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); +} |