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path: root/drivers/gpu/drm/vboxvideo/vbox_fb.c
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Diffstat (limited to 'drivers/gpu/drm/vboxvideo/vbox_fb.c')
-rw-r--r--drivers/gpu/drm/vboxvideo/vbox_fb.c155
1 files changed, 155 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..83a04afd1766
--- /dev/null
+++ b/drivers/gpu/drm/vboxvideo/vbox_fb.c
@@ -0,0 +1,155 @@
+// 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);
+
+ info->par = helper;
+
+ fb = &vbox->afb.base;
+ helper->fb = fb;
+
+ strcpy(info->fix.id, "vboxdrmfb");
+
+ 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_fix(info, fb->pitches[0], fb->format->depth);
+ drm_fb_helper_fill_var(info, helper, sizes->fb_width,
+ sizes->fb_height);
+
+ 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);
+}