vbox_fb.c@ 98870

Last change on this file since 98870 was 98870, checked in by vboxsync, 2 years ago
Additions: Linux: vboxvideo: Introduce initial support for kernel 6.3.x series (scm fix), bugref:10381.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 13.5 KB

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1	/* $Id: vbox_fb.c 98870 2023-03-07 17:28:03Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2023 Oracle and/or its affiliates.
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 "vbox_drv.h"
46
47	#include <drm/drm_crtc.h>
48	#include <drm/drm_fb_helper.h>
49	#include <drm/drm_crtc_helper.h>
50
51	#include <VBoxVideo.h>
52
53	#if RTLNX_VER_MIN(6,2,0)
54	# define VBOX_FBDEV_INFO(_helper) _helper.info
55	#else
56	# define VBOX_FBDEV_INFO(_helper) _helper.fbdev
57	#endif
58
59	#if RTLNX_VER_MAX(4,7,0) && !RTLNX_RHEL_MAJ_PREREQ(7,4)
60	/**
61	* Tell the host about dirty rectangles to update.
62	*/
63	static void vbox_dirty_update(struct vbox_fbdev *fbdev,
64	int x, int y, int width, int height)
65	{
66	struct drm_gem_object *obj;
67	struct vbox_bo *bo;
68	int ret = -EBUSY;
69	bool store_for_later = false;
70	int x2, y2;
71	unsigned long flags;
72	struct drm_clip_rect rect;
73
74	obj = fbdev->afb.obj;
75	bo = gem_to_vbox_bo(obj);
76
77	/*
78	* try and reserve the BO, if we fail with busy
79	* then the BO is being moved and we should
80	* store up the damage until later.
81	*/
82	if (drm_can_sleep())
83	ret = vbox_bo_reserve(bo, true);
84	if (ret) {
85	if (ret != -EBUSY)
86	return;
87
88	store_for_later = true;
89	}
90
91	x2 = x + width - 1;
92	y2 = y + height - 1;
93	spin_lock_irqsave(&fbdev->dirty_lock, flags);
94
95	if (fbdev->y1 < y)
96	y = fbdev->y1;
97	if (fbdev->y2 > y2)
98	y2 = fbdev->y2;
99	if (fbdev->x1 < x)
100	x = fbdev->x1;
101	if (fbdev->x2 > x2)
102	x2 = fbdev->x2;
103
104	if (store_for_later) {
105	fbdev->x1 = x;
106	fbdev->x2 = x2;
107	fbdev->y1 = y;
108	fbdev->y2 = y2;
109	spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
110	return;
111	}
112
113	fbdev->x1 = INT_MAX;
114	fbdev->y1 = INT_MAX;
115	fbdev->x2 = 0;
116	fbdev->y2 = 0;
117
118	spin_unlock_irqrestore(&fbdev->dirty_lock, flags);
119
120	/*
121	* Not sure why the original code subtracted 1 here, but I will keep
122	* it that way to avoid unnecessary differences.
123	*/
124	rect.x1 = x;
125	rect.x2 = x2 + 1;
126	rect.y1 = y;
127	rect.y2 = y2 + 1;
128	vbox_framebuffer_dirty_rectangles(&fbdev->afb.base, &rect, 1);
129
130	vbox_bo_unreserve(bo);
131	}
132	#endif /* RTLNX_VER_MAX(4,7,0) && !RTLNX_RHEL_MAJ_PREREQ(7,4) */
133
134	#ifdef CONFIG_FB_DEFERRED_IO
135	# if RTLNX_VER_MAX(4,7,0) && !RTLNX_RHEL_MAJ_PREREQ(7,4)
136	static void drm_fb_helper_deferred_io(struct fb_info info, struct list_head pagelist)
137	{
138	struct vbox_fbdev *fbdev = info->par;
139	unsigned long start, end, min, max;
140	struct page *page;
141	int y1, y2;
142
143	min = ULONG_MAX;
144	max = 0;
145	list_for_each_entry(page, pagelist, lru) {
146	start = page->index << PAGE_SHIFT;
147	end = start + PAGE_SIZE - 1;
148	min = min(min, start);
149	max = max(max, end);
150	}
151
152	if (min < max) {
153	y1 = min / info->fix.line_length;
154	y2 = (max / info->fix.line_length) + 1;
155	DRM_INFO("%s: Calling dirty update: 0, %d, %d, %d\n",
156	__func__, y1, info->var.xres, y2 - y1 - 1);
157	vbox_dirty_update(fbdev, 0, y1, info->var.xres, y2 - y1 - 1);
158	}
159	}
160	# endif
161
162	static struct fb_deferred_io vbox_defio = {
163	.delay = HZ / 30,
164	.deferred_io = drm_fb_helper_deferred_io,
165	};
166	#endif /* CONFIG_FB_DEFERRED_IO */
167
168	#if RTLNX_VER_MAX(4,3,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3)
169	static void drm_fb_helper_sys_fillrect(struct fb_info info, const struct fb_fillrect rect)
170	{
171	struct vbox_fbdev *fbdev = info->par;
172
173	sys_fillrect(info, rect);
174	vbox_dirty_update(fbdev, rect->dx, rect->dy, rect->width, rect->height);
175	}
176
177	static void drm_fb_helper_sys_copyarea(struct fb_info info, const struct fb_copyarea area)
178	{
179	struct vbox_fbdev *fbdev = info->par;
180
181	sys_copyarea(info, area);
182	vbox_dirty_update(fbdev, area->dx, area->dy, area->width, area->height);
183	}
184
185	static void drm_fb_helper_sys_imageblit(struct fb_info info, const struct fb_image image)
186	{
187	struct vbox_fbdev *fbdev = info->par;
188
189	sys_imageblit(info, image);
190	vbox_dirty_update(fbdev, image->dx, image->dy, image->width,
191	image->height);
192	}
193	#endif /* RTLNX_VER_MAX(4,3,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3) */
194
195	static struct fb_ops vboxfb_ops = {
196	.owner = THIS_MODULE,
197	.fb_check_var = drm_fb_helper_check_var,
198	.fb_set_par = drm_fb_helper_set_par,
199	.fb_fillrect = drm_fb_helper_sys_fillrect,
200	.fb_copyarea = drm_fb_helper_sys_copyarea,
201	.fb_imageblit = drm_fb_helper_sys_imageblit,
202	.fb_pan_display = drm_fb_helper_pan_display,
203	.fb_blank = drm_fb_helper_blank,
204	.fb_setcmap = drm_fb_helper_setcmap,
205	.fb_debug_enter = drm_fb_helper_debug_enter,
206	.fb_debug_leave = drm_fb_helper_debug_leave,
207	};
208
209	static int vboxfb_create_object(struct vbox_fbdev *fbdev,
210	struct DRM_MODE_FB_CMD *mode_cmd,
211	struct drm_gem_object **gobj_p)
212	{
213	struct drm_device *dev = fbdev->helper.dev;
214	u32 size;
215	struct drm_gem_object *gobj;
216	#if RTLNX_VER_MAX(3,3,0)
217	u32 pitch = mode_cmd->pitch;
218	#else
219	u32 pitch = mode_cmd->pitches[0];
220	#endif
221
222	int ret;
223
224	size = pitch * mode_cmd->height;
225	ret = vbox_gem_create(dev, size, true, &gobj);
226	if (ret)
227	return ret;
228
229	*gobj_p = gobj;
230
231	return 0;
232	}
233
234	#if RTLNX_VER_MAX(4,3,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3)
235	static struct fb_info drm_fb_helper_alloc_fbi(struct drm_fb_helper helper)
236	{
237	struct fb_info *info;
238	struct vbox_fbdev *fbdev =
239	container_of(helper, struct vbox_fbdev, helper);
240	struct drm_device *dev = fbdev->helper.dev;
241	struct device *device = &dev->pdev->dev;
242
243	info = framebuffer_alloc(0, device);
244	if (!info)
245	return ERR_PTR(-ENOMEM);
246	fbdev->helper.fbdev = info;
247
248	if (fb_alloc_cmap(&info->cmap, 256, 0))
249	return ERR_PTR(-ENOMEM);
250
251	info->apertures = alloc_apertures(1);
252	if (!info->apertures)
253	return ERR_PTR(-ENOMEM);
254
255	return info;
256	}
257	#endif
258
259	static int vboxfb_create(struct drm_fb_helper *helper,
260	struct drm_fb_helper_surface_size *sizes)
261	{
262	struct vbox_fbdev *fbdev =
263	container_of(helper, struct vbox_fbdev, helper);
264	struct drm_device *dev = fbdev->helper.dev;
265	struct DRM_MODE_FB_CMD mode_cmd;
266	struct drm_framebuffer *fb;
267	struct fb_info *info;
268	struct drm_gem_object *gobj;
269	struct vbox_bo *bo;
270	int size, ret;
271	u32 pitch;
272
273	mode_cmd.width = sizes->surface_width;
274	mode_cmd.height = sizes->surface_height;
275	pitch = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
276	#if RTLNX_VER_MAX(3,3,0)
277	mode_cmd.bpp = sizes->surface_bpp;
278	mode_cmd.depth = sizes->surface_depth;
279	mode_cmd.pitch = pitch;
280	#else
281	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
282	sizes->surface_depth);
283	mode_cmd.pitches[0] = pitch;
284	#endif
285
286	size = pitch * mode_cmd.height;
287
288	ret = vboxfb_create_object(fbdev, &mode_cmd, &gobj);
289	if (ret) {
290	DRM_ERROR("failed to create fbcon backing object %d\n", ret);
291	return ret;
292	}
293
294	ret = vbox_framebuffer_init(dev, &fbdev->afb, &mode_cmd, gobj);
295	if (ret)
296	return ret;
297
298	bo = gem_to_vbox_bo(gobj);
299
300	ret = vbox_bo_reserve(bo, false);
301	if (ret)
302	return ret;
303
304	ret = vbox_bo_pin(bo, VBOX_MEM_TYPE_VRAM, NULL);
305	if (ret) {
306	vbox_bo_unreserve(bo);
307	return ret;
308	}
309
310	#if RTLNX_VER_MIN(5,14,0) \|\| RTLNX_RHEL_RANGE(8,6, 8,99)
311	ret = ttm_bo_kmap(&bo->bo, 0, VBOX_BO_RESOURCE_NUM_PAGES(bo->bo.resource), &bo->kmap);
312	#elif RTLNX_VER_MIN(5,12,0) \|\| RTLNX_RHEL_MAJ_PREREQ(8,5)
313	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.mem.num_pages, &bo->kmap);
314	#else
315	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
316	#endif
317
318	vbox_bo_unreserve(bo);
319	if (ret) {
320	DRM_ERROR("failed to kmap fbcon\n");
321	return ret;
322	}
323
324	#if RTLNX_VER_MIN(6,2,0)
325	info = drm_fb_helper_alloc_info(helper);
326	#else
327	info = drm_fb_helper_alloc_fbi(helper);
328	#endif
329	if (IS_ERR(info))
330	return -PTR_ERR(info);
331
332	info->par = fbdev;
333
334	fbdev->size = size;
335
336	fb = &fbdev->afb.base;
337	fbdev->helper.fb = fb;
338
339	strcpy(info->fix.id, "vboxdrmfb");
340
341	/*
342	* The last flag forces a mode set on VT switches even if the kernel
343	* does not think it is needed.
344	*/
345	info->flags = FBINFO_DEFAULT \| FBINFO_MISC_ALWAYS_SETPAR;
346	info->fbops = &vboxfb_ops;
347
348	#if RTLNX_VER_MAX(6,3,0)
349	/*
350	* This seems to be done for safety checking that the framebuffer
351	* is not registered twice by different drivers.
352	*/
353	info->apertures->ranges[0].base = pci_resource_start(VBOX_DRM_TO_PCI_DEV(dev), 0);
354	info->apertures->ranges[0].size = pci_resource_len(VBOX_DRM_TO_PCI_DEV(dev), 0);
355	#endif
356
357	#if RTLNX_VER_MIN(5,2,0) \|\| RTLNX_RHEL_MAJ_PREREQ(8,2)
358	/*
359	* The corresponding 5.2-rc1 Linux DRM kernel changes have been
360	* also backported to older RedHat based 4.18.0 Linux kernels.
361	*/
362	drm_fb_helper_fill_info(info, &fbdev->helper, sizes);
363	#elif RTLNX_VER_MIN(4,11,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7, 5)
364	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
365	#else
366	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
367	#endif
368	#if RTLNX_VER_MAX(5,2,0) && !RTLNX_RHEL_MAJ_PREREQ(8,2)
369	drm_fb_helper_fill_var(info, &fbdev->helper, sizes->fb_width,
370	sizes->fb_height);
371	#endif
372
373	info->screen_base = (char __iomem *)bo->kmap.virtual;
374	info->screen_size = size;
375
376	#ifdef CONFIG_FB_DEFERRED_IO
377	# if RTLNX_VER_MIN(5,19,0)
378	info->fix.smem_len = info->screen_size;
379	# endif
380	info->fbdefio = &vbox_defio;
381	fb_deferred_io_init(info);
382	#endif
383
384	info->pixmap.flags = FB_PIXMAP_SYSTEM;
385
386	DRM_DEBUG_KMS("allocated %dx%d\n", fb->width, fb->height);
387
388	return 0;
389	}
390
391	static struct drm_fb_helper_funcs vbox_fb_helper_funcs = {
392	.fb_probe = vboxfb_create,
393	};
394
395	#if RTLNX_VER_MAX(4,3,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3)
396	static void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
397	{
398	if (fb_helper && fb_helper->fbdev)
399	unregister_framebuffer(fb_helper->fbdev);
400	}
401	#endif
402
403	void vbox_fbdev_fini(struct drm_device *dev)
404	{
405	struct vbox_private *vbox = dev->dev_private;
406	struct vbox_fbdev *fbdev = vbox->fbdev;
407	struct vbox_framebuffer *afb = &fbdev->afb;
408
409	#ifdef CONFIG_FB_DEFERRED_IO
410	if (VBOX_FBDEV_INFO(fbdev->helper) && VBOX_FBDEV_INFO(fbdev->helper)->fbdefio)
411	fb_deferred_io_cleanup(VBOX_FBDEV_INFO(fbdev->helper));
412	#endif
413
414	#if RTLNX_VER_MIN(6,2,0)
415	drm_fb_helper_unregister_info(&fbdev->helper);
416	#else
417	drm_fb_helper_unregister_fbi(&fbdev->helper);
418	#endif
419
420	if (afb->obj) {
421	struct vbox_bo *bo = gem_to_vbox_bo(afb->obj);
422
423	if (!vbox_bo_reserve(bo, false)) {
424	if (bo->kmap.virtual)
425	ttm_bo_kunmap(&bo->kmap);
426	/*
427	* QXL does this, but is it really needed before
428	* freeing?
429	*/
430	if (bo->pin_count)
431	vbox_bo_unpin(bo);
432	vbox_bo_unreserve(bo);
433	}
434	#if RTLNX_VER_MIN(5,9,0) \|\| RTLNX_RHEL_MIN(8,4) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
435	drm_gem_object_put(afb->obj);
436	#else
437	drm_gem_object_put_unlocked(afb->obj);
438	#endif
439	afb->obj = NULL;
440	}
441	drm_fb_helper_fini(&fbdev->helper);
442
443	#if RTLNX_VER_MIN(3,9,0)
444	drm_framebuffer_unregister_private(&afb->base);
445	#endif
446	drm_framebuffer_cleanup(&afb->base);
447	}
448
449	int vbox_fbdev_init(struct drm_device *dev)
450	{
451	struct vbox_private *vbox = dev->dev_private;
452	struct vbox_fbdev *fbdev;
453	int ret = 0;
454
455	fbdev = devm_kzalloc(dev->dev, sizeof(*fbdev), GFP_KERNEL);
456	if (!fbdev)
457	return -ENOMEM;
458
459	vbox->fbdev = fbdev;
460	spin_lock_init(&fbdev->dirty_lock);
461
462	#if RTLNX_VER_MIN(6,3,0)
463	drm_fb_helper_prepare(dev, &fbdev->helper, 32, &vbox_fb_helper_funcs);
464	#elif RTLNX_VER_MIN(3,17,0) \|\| RTLNX_RHEL_MIN(7,2)
465	drm_fb_helper_prepare(dev, &fbdev->helper, &vbox_fb_helper_funcs);
466	#else
467	fbdev->helper.funcs = &vbox_fb_helper_funcs;
468	#endif
469
470	#if RTLNX_VER_MIN(5,7,0) \|\| RTLNX_RHEL_MIN(8,4) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
471	ret = drm_fb_helper_init(dev, &fbdev->helper);
472	#elif RTLNX_VER_MIN(4,11,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,5)
473	ret = drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs);
474	#else /* < 4.11.0 */
475	ret =
476	drm_fb_helper_init(dev, &fbdev->helper, vbox->num_crtcs,
477	vbox->num_crtcs);
478	#endif
479	if (ret)
480	return ret;
481
482	#if RTLNX_VER_MAX(5,7,0) && !RTLNX_RHEL_MAJ_PREREQ(8,4) && !RTLNX_SUSE_MAJ_PREREQ(15,3)
483	ret = drm_fb_helper_single_add_all_connectors(&fbdev->helper);
484	if (ret)
485	goto err_fini;
486	#endif
487
488	/* disable all the possible outputs/crtcs before entering KMS mode */
489	drm_helper_disable_unused_functions(dev);
490
491	#if RTLNX_VER_MIN(6,3,0)
492	ret = drm_fb_helper_initial_config(&fbdev->helper);
493	#else
494	ret = drm_fb_helper_initial_config(&fbdev->helper, 32);
495	#endif
496	if (ret)
497	goto err_fini;
498
499	return 0;
500
501	err_fini:
502	drm_fb_helper_fini(&fbdev->helper);
503	return ret;
504	}
505
506	void vbox_fbdev_set_base(struct vbox_private *vbox, unsigned long gpu_addr)
507	{
508	struct fb_info *fbdev = VBOX_FBDEV_INFO(vbox->fbdev->helper);
509
510	#if RTLNX_VER_MIN(6,3,0)
511	fbdev->fix.smem_start =
512	pci_resource_start(VBOX_DRM_TO_PCI_DEV(vbox->fbdev->helper.dev), 0) + gpu_addr;
513	#else
514	fbdev->fix.smem_start = fbdev->apertures->ranges[0].base + gpu_addr;
515	#endif
516	fbdev->fix.smem_len = vbox->available_vram_size - gpu_addr;
517	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_fb.c@ 98870

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