vbox_fb.c@ 76553

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1	/* $Id: vbox_fb.c 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2019 Oracle Corporation
8	* This file is based on ast_fb.c
9	* Copyright 2012 Red Hat Inc.
10	*
11	* Permission is hereby granted, free of charge, to any person obtaining a
12	* copy of this software and associated documentation files (the
13	* "Software"), to deal in the Software without restriction, including
14	* without limitation the rights to use, copy, modify, merge, publish,
15	* distribute, sub license, and/or sell copies of the Software, and to
16	* permit persons to whom the Software is furnished to do so, subject to
17	* the following conditions:
18	*
19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25	* USE OR OTHER DEALINGS IN THE SOFTWARE.
26	*
27	* The above copyright notice and this permission notice (including the
28	* next paragraph) shall be included in all copies or substantial portions
29	* of the Software.
30	*
31	* Authors: Dave Airlie <[email protected]>
32	* Michael Thayer <[email protected],
33	*/
34	#include <linux/module.h>
35	#include <linux/kernel.h>
36	#include <linux/errno.h>
37	#include <linux/string.h>
38	#include <linux/mm.h>
39	#include <linux/tty.h>
40	#include <linux/sysrq.h>
41	#include <linux/delay.h>
42	#include <linux/fb.h>
43	#include <linux/init.h>
44
45	#include <drm/drmP.h>
46	#include <drm/drm_crtc.h>
47	#include <drm/drm_fb_helper.h>
48	#include <drm/drm_crtc_helper.h>
49
50	#include "vbox_drv.h"
51	#include <VBoxVideo.h>
52
53	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
54	/**
55	* Tell the host about dirty rectangles to update.
56	*/
57	static void vbox_dirty_update(struct vbox_fbdev *fbdev,
58	int x, int y, int width, int height)
59	{
60	struct drm_gem_object *obj;
61	struct vbox_bo *bo;
62	int ret = -EBUSY;
63	bool store_for_later = false;
64	int x2, y2;
65	unsigned long flags;
66	struct drm_clip_rect rect;
67
68	obj = fbdev->afb.obj;
69	bo = gem_to_vbox_bo(obj);
70
71	/*
72	* try and reserve the BO, if we fail with busy
73	* then the BO is being moved and we should
74	* store up the damage until later.
75	*/
76	if (drm_can_sleep())
77	ret = vbox_bo_reserve(bo, true);
78	if (ret) {
79	if (ret != -EBUSY)
80	return;
81
82	store_for_later = true;
83	}
84
85	x2 = x + width - 1;
86	y2 = y + height - 1;
87	spin_lock_irqsave(&fbdev->dirty_lock, flags);
88
89	if (fbdev->y1 < y)
90	y = fbdev->y1;
91	if (fbdev->y2 > y2)
92	y2 = fbdev->y2;
93	if (fbdev->x1 < x)
94	x = fbdev->x1;
95	if (fbdev->x2 > x2)
96	x2 = fbdev->x2;
97
98	if (store_for_later) {
99	fbdev->x1 = x;
100	fbdev->x2 = x2;
101	fbdev->y1 = y;
102	fbdev->y2 = y2;
103	spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
104	return;
105	}
106
107	fbdev->x1 = INT_MAX;
108	fbdev->y1 = INT_MAX;
109	fbdev->x2 = 0;
110	fbdev->y2 = 0;
111
112	spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
113
114	/*
115	* Not sure why the original code subtracted 1 here, but I will keep
116	* it that way to avoid unnecessary differences.
117	*/
118	rect.x1 = x;
119	rect.x2 = x2 + 1;
120	rect.y1 = y;
121	rect.y2 = y2 + 1;
122	vbox_framebuffer_dirty_rectangles(&fbdev->afb.base, &rect, 1);
123
124	vbox_bo_unreserve(bo);
125	}
126	#endif
127
128	#ifdef CONFIG_FB_DEFERRED_IO
129	# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0) && !defined(RHEL_74)
130	static void drm_fb_helper_deferred_io(struct fb_info info, struct list_head pagelist)
131	{
132	struct vbox_fbdev *fbdev = info->par;
133	unsigned long start, end, min, max;
134	struct page *page;
135	int y1, y2;
136
137	min = ULONG_MAX;
138	max = 0;
139	list_for_each_entry(page, pagelist, lru) {
140	start = page->index << PAGE_SHIFT;
141	end = start + PAGE_SIZE - 1;
142	min = min(min, start);
143	max = max(max, end);
144	}
145
146	if (min < max) {
147	y1 = min / info->fix.line_length;
148	y2 = (max / info->fix.line_length) + 1;
149	DRM_INFO("%s: Calling dirty update: 0, %d, %d, %d\n",
150	__func__, y1, info->var.xres, y2 - y1 - 1);
151	vbox_dirty_update(fbdev, 0, y1, info->var.xres, y2 - y1 - 1);
152	}
153	}
154	# endif
155
156	static struct fb_deferred_io vbox_defio = {
157	.delay = HZ / 30,
158	.deferred_io = drm_fb_helper_deferred_io,
159	};
160	#endif
161
162	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
163	static void drm_fb_helper_sys_fillrect(struct fb_info info, const struct fb_fillrect rect)
164	{
165	struct vbox_fbdev *fbdev = info->par;
166
167	sys_fillrect(info, rect);
168	vbox_dirty_update(fbdev, rect->dx, rect->dy, rect->width, rect->height);
169	}
170
171	static void drm_fb_helper_sys_copyarea(struct fb_info info, const struct fb_copyarea area)
172	{
173	struct vbox_fbdev *fbdev = info->par;
174
175	sys_copyarea(info, area);
176	vbox_dirty_update(fbdev, area->dx, area->dy, area->width, area->height);
177	}
178
179	static void drm_fb_helper_sys_imageblit(struct fb_info info, const struct fb_image image)
180	{
181	struct vbox_fbdev *fbdev = info->par;
182
183	sys_imageblit(info, image);
184	vbox_dirty_update(fbdev, image->dx, image->dy, image->width,
185	image->height);
186	}
187	#endif
188
189	static struct fb_ops vboxfb_ops = {
190	.owner = THIS_MODULE,
191	.fb_check_var = drm_fb_helper_check_var,
192	.fb_set_par = drm_fb_helper_set_par,
193	.fb_fillrect = drm_fb_helper_sys_fillrect,
194	.fb_copyarea = drm_fb_helper_sys_copyarea,
195	.fb_imageblit = drm_fb_helper_sys_imageblit,
196	.fb_pan_display = drm_fb_helper_pan_display,
197	.fb_blank = drm_fb_helper_blank,
198	.fb_setcmap = drm_fb_helper_setcmap,
199	.fb_debug_enter = drm_fb_helper_debug_enter,
200	.fb_debug_leave = drm_fb_helper_debug_leave,
201	};
202
203	static int vboxfb_create_object(struct vbox_fbdev *fbdev,
204	struct DRM_MODE_FB_CMD *mode_cmd,
205	struct drm_gem_object **gobj_p)
206	{
207	struct drm_device *dev = fbdev->helper.dev;
208	u32 size;
209	struct drm_gem_object *gobj;
210	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
211	u32 pitch = mode_cmd->pitch;
212	#else
213	u32 pitch = mode_cmd->pitches[0];
214	#endif
215
216	int ret;
217
218	size = pitch * mode_cmd->height;
219	ret = vbox_gem_create(dev, size, true, &gobj);
220	if (ret)
221	return ret;
222
223	*gobj_p = gobj;
224
225	return 0;
226	}
227
228	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
229	static struct fb_info drm_fb_helper_alloc_fbi(struct drm_fb_helper helper)
230	{
231	struct fb_info *info;
232	struct vbox_fbdev *fbdev =
233	container_of(helper, struct vbox_fbdev, helper);
234	struct drm_device *dev = fbdev->helper.dev;
235	struct device *device = &dev->pdev->dev;
236
237	info = framebuffer_alloc(0, device);
238	if (!info)
239	return ERR_PTR(-ENOMEM);
240	fbdev->helper.fbdev = info;
241
242	if (fb_alloc_cmap(&info->cmap, 256, 0))
243	return ERR_PTR(-ENOMEM);
244
245	info->apertures = alloc_apertures(1);
246	if (!info->apertures)
247	return ERR_PTR(-ENOMEM);
248
249	return info;
250	}
251	#endif
252
253	static int vboxfb_create(struct drm_fb_helper *helper,
254	struct drm_fb_helper_surface_size *sizes)
255	{
256	struct vbox_fbdev *fbdev =
257	container_of(helper, struct vbox_fbdev, helper);
258	struct drm_device *dev = fbdev->helper.dev;
259	struct DRM_MODE_FB_CMD mode_cmd;
260	struct drm_framebuffer *fb;
261	struct fb_info *info;
262	struct drm_gem_object *gobj;
263	struct vbox_bo *bo;
264	int size, ret;
265	u32 pitch;
266
267	mode_cmd.width = sizes->surface_width;
268	mode_cmd.height = sizes->surface_height;
269	pitch = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
270	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
271	mode_cmd.bpp = sizes->surface_bpp;
272	mode_cmd.depth = sizes->surface_depth;
273	mode_cmd.pitch = pitch;
274	#else
275	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
276	sizes->surface_depth);
277	mode_cmd.pitches[0] = pitch;
278	#endif
279
280	size = pitch * mode_cmd.height;
281
282	ret = vboxfb_create_object(fbdev, &mode_cmd, &gobj);
283	if (ret) {
284	DRM_ERROR("failed to create fbcon backing object %d\n", ret);
285	return ret;
286	}
287
288	ret = vbox_framebuffer_init(dev, &fbdev->afb, &mode_cmd, gobj);
289	if (ret)
290	return ret;
291
292	bo = gem_to_vbox_bo(gobj);
293
294	ret = vbox_bo_reserve(bo, false);
295	if (ret)
296	return ret;
297
298	ret = vbox_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
299	if (ret) {
300	vbox_bo_unreserve(bo);
301	return ret;
302	}
303
304	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
305	vbox_bo_unreserve(bo);
306	if (ret) {
307	DRM_ERROR("failed to kmap fbcon\n");
308	return ret;
309	}
310
311	info = drm_fb_helper_alloc_fbi(helper);
312	if (IS_ERR(info))
313	return -PTR_ERR(info);
314
315	info->par = fbdev;
316
317	fbdev->size = size;
318
319	fb = &fbdev->afb.base;
320	fbdev->helper.fb = fb;
321
322	strcpy(info->fix.id, "vboxdrmfb");
323
324	/*
325	* The last flag forces a mode set on VT switches even if the kernel
326	* does not think it is needed.
327	*/
328	info->flags = FBINFO_DEFAULT \| FBINFO_MISC_ALWAYS_SETPAR;
329	info->fbops = &vboxfb_ops;
330
331	/*
332	* This seems to be done for safety checking that the framebuffer
333	* is not registered twice by different drivers.
334	*/
335	info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
336	info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
337
338	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) \|\| defined(RHEL_75)
339	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
340	#else
341	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
342	#endif
343	drm_fb_helper_fill_var(info, &fbdev->helper, sizes->fb_width,
344	sizes->fb_height);
345
346	info->screen_base = bo->kmap.virtual;
347	info->screen_size = size;
348
349	#ifdef CONFIG_FB_DEFERRED_IO
350	info->fbdefio = &vbox_defio;
351	fb_deferred_io_init(info);
352	#endif
353
354	info->pixmap.flags = FB_PIXMAP_SYSTEM;
355
356	DRM_DEBUG_KMS("allocated %dx%d\n", fb->width, fb->height);
357
358	return 0;
359	}
360
361	static struct drm_fb_helper_funcs vbox_fb_helper_funcs = {
362	.fb_probe = vboxfb_create,
363	};
364
365	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(RHEL_73)
366	static void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
367	{
368	if (fb_helper && fb_helper->fbdev)
369	unregister_framebuffer(fb_helper->fbdev);
370	}
371	#endif
372
373	void vbox_fbdev_fini(struct drm_device *dev)
374	{
375	struct vbox_private *vbox = dev->dev_private;
376	struct vbox_fbdev *fbdev = vbox->fbdev;
377	struct vbox_framebuffer *afb = &fbdev->afb;
378
379	drm_fb_helper_unregister_fbi(&fbdev->helper);
380
381	if (afb->obj) {
382	struct vbox_bo *bo = gem_to_vbox_bo(afb->obj);
383
384	if (!vbox_bo_reserve(bo, false)) {
385	if (bo->kmap.virtual)
386	ttm_bo_kunmap(&bo->kmap);
387	/*
388	* QXL does this, but is it really needed before
389	* freeing?
390	*/
391	if (bo->pin_count)
392	vbox_bo_unpin(bo);
393	vbox_bo_unreserve(bo);
394	}
395	drm_gem_object_put_unlocked(afb->obj);
396	afb->obj = NULL;
397	}
398	drm_fb_helper_fini(&fbdev->helper);
399
400	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
401	drm_framebuffer_unregister_private(&afb->base);
402	#endif
403	drm_framebuffer_cleanup(&afb->base);
404	}
405
406	int vbox_fbdev_init(struct drm_device *dev)
407	{
408	struct vbox_private *vbox = dev->dev_private;
409	struct vbox_fbdev *fbdev;
410	int ret;
411
412	fbdev = devm_kzalloc(dev->dev, sizeof(*fbdev), GFP_KERNEL);
413	if (!fbdev)
414	return -ENOMEM;
415
416	vbox->fbdev = fbdev;
417	spin_lock_init(&fbdev->dirty_lock);
418
419	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_73)
420	fbdev->helper.funcs = &vbox_fb_helper_funcs;
421	#else
422	drm_fb_helper_prepare(dev, &fbdev->helper, &vbox_fb_helper_funcs);
423	#endif
424	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) \|\| defined(RHEL_75)
425	ret = drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs);
426	#else
427	ret =
428	drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs,
429	vbox->num_crtcs);
430	#endif
431	if (ret)
432	return ret;
433
434	ret = drm_fb_helper_single_add_all_connectors(&fbdev->helper);
435	if (ret)
436	goto err_fini;
437
438	/* disable all the possible outputs/crtcs before entering KMS mode */
439	drm_helper_disable_unused_functions(dev);
440
441	ret = drm_fb_helper_initial_config(&fbdev->helper, 32);
442	if (ret)
443	goto err_fini;
444
445	return 0;
446
447	err_fini:
448	drm_fb_helper_fini(&fbdev->helper);
449	return ret;
450	}
451
452	void vbox_fbdev_set_base(struct vbox_private *vbox, unsigned long gpu_addr)
453	{
454	struct fb_info *fbdev = vbox->fbdev->helper.fbdev;
455
456	fbdev->fix.smem_start = fbdev->apertures->ranges[0].base + gpu_addr;
457	fbdev->fix.smem_len = vbox->available_vram_size - gpu_addr;
458	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_fb.c@ 76553

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