vbox_main.c@ 94330

Last change on this file since 94330 was 94330, checked in by vboxsync, 3 years ago
Additions: Linux: vboxvideo: Introduce initial support for RHEL 8.6 kernels (another attempt to exclude 8.99), bugref:4567.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 17.9 KB

Line
1	/* $Id: vbox_main.c 94330 2022-03-22 19:23:04Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2022 Oracle Corporation
8	* This file is based on ast_main.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 <airlied@redhat.com>,
32	* Michael Thayer <michael.thayer@oracle.com,
33	* Hans de Goede <hdegoede@redhat.com>
34	*/
35	#include "vbox_drv.h"
36	#include <drm/drm_fb_helper.h>
37	#include <drm/drm_crtc_helper.h>
38
39	#include <VBoxVideoGuest.h>
40	#include <VBoxVideoVBE.h>
41
42	#include "hgsmi_channels.h"
43
44	static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
45	{
46	struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);
47
48	if (vbox_fb->obj)
49	#if RTLNX_VER_MIN(5,9,0) \|\| RTLNX_RHEL_MIN(8,4) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
50	drm_gem_object_put(vbox_fb->obj);
51	#else
52	drm_gem_object_put_unlocked(vbox_fb->obj);
53	#endif
54
55	drm_framebuffer_cleanup(fb);
56	kfree(fb);
57	}
58
59	void vbox_enable_accel(struct vbox_private *vbox)
60	{
61	unsigned int i;
62	struct VBVABUFFER *vbva;
63
64	if (!vbox->vbva_info \|\| !vbox->vbva_buffers) {
65	/* Should never happen... */
66	DRM_ERROR("vboxvideo: failed to set up VBVA.\n");
67	return;
68	}
69
70	for (i = 0; i < vbox->num_crtcs; ++i) {
71	if (vbox->vbva_info[i].pVBVA)
72	continue;
73
74	vbva = (void __force *)vbox->vbva_buffers +
75	i * VBVA_MIN_BUFFER_SIZE;
76	if (!VBoxVBVAEnable(&vbox->vbva_info[i],
77	vbox->guest_pool, vbva, i)) {
78	/* very old host or driver error. */
79	DRM_ERROR("vboxvideo: vbva_enable failed\n");
80	return;
81	}
82	}
83	}
84
85	void vbox_disable_accel(struct vbox_private *vbox)
86	{
87	unsigned int i;
88
89	for (i = 0; i < vbox->num_crtcs; ++i)
90	VBoxVBVADisable(&vbox->vbva_info[i], vbox->guest_pool, i);
91	}
92
93	void vbox_report_caps(struct vbox_private *vbox)
94	{
95	u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION \|
96	VBVACAPS_IRQ \| VBVACAPS_USE_VBVA_ONLY;
97
98	if (vbox->initial_mode_queried)
99	caps \|= VBVACAPS_VIDEO_MODE_HINTS;
100
101	VBoxHGSMISendCapsInfo(vbox->guest_pool, caps);
102	}
103
104	/**
105	* Send information about dirty rectangles to VBVA. If necessary we enable
106	* VBVA first, as this is normally disabled after a change of master in case
107	* the new master does not send dirty rectangle information (is this even
108	* allowed?)
109	*/
110	void vbox_framebuffer_dirty_rectangles(struct drm_framebuffer *fb,
111	struct drm_clip_rect *rects,
112	unsigned int num_rects)
113	{
114	struct vbox_private *vbox = fb->dev->dev_private;
115	struct drm_crtc *crtc;
116	unsigned int i;
117
118	/* The user can send rectangles, we do not need the timer. */
119	vbox->need_refresh_timer = false;
120	mutex_lock(&vbox->hw_mutex);
121	list_for_each_entry(crtc, &fb->dev->mode_config.crtc_list, head) {
122	if (CRTC_FB(crtc) != fb)
123	continue;
124
125	for (i = 0; i < num_rects; ++i) {
126	VBVACMDHDR cmd_hdr;
127	unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;
128
129	if ((rects[i].x1 > crtc->x + crtc->hwmode.hdisplay) \|\|
130	(rects[i].y1 > crtc->y + crtc->hwmode.vdisplay) \|\|
131	(rects[i].x2 < crtc->x) \|\|
132	(rects[i].y2 < crtc->y))
133	continue;
134
135	cmd_hdr.x = (s16)rects[i].x1;
136	cmd_hdr.y = (s16)rects[i].y1;
137	cmd_hdr.w = (u16)rects[i].x2 - rects[i].x1;
138	cmd_hdr.h = (u16)rects[i].y2 - rects[i].y1;
139
140	if (!VBoxVBVABufferBeginUpdate(&vbox->vbva_info[crtc_id],
141	vbox->guest_pool))
142	continue;
143
144	VBoxVBVAWrite(&vbox->vbva_info[crtc_id], vbox->guest_pool,
145	&cmd_hdr, sizeof(cmd_hdr));
146	VBoxVBVABufferEndUpdate(&vbox->vbva_info[crtc_id]);
147	}
148	}
149	mutex_unlock(&vbox->hw_mutex);
150	}
151
152	static int vbox_user_framebuffer_dirty(struct drm_framebuffer *fb,
153	struct drm_file *file_priv,
154	unsigned int flags, unsigned int color,
155	struct drm_clip_rect *rects,
156	unsigned int num_rects)
157	{
158	vbox_framebuffer_dirty_rectangles(fb, rects, num_rects);
159
160	return 0;
161	}
162
163	static const struct drm_framebuffer_funcs vbox_fb_funcs = {
164	.destroy = vbox_user_framebuffer_destroy,
165	.dirty = vbox_user_framebuffer_dirty,
166	};
167
168	int vbox_framebuffer_init(struct drm_device *dev,
169	struct vbox_framebuffer *vbox_fb,
170	#if RTLNX_VER_MIN(4,5,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,3)
171	const struct DRM_MODE_FB_CMD *mode_cmd,
172	#else
173	struct DRM_MODE_FB_CMD *mode_cmd,
174	#endif
175	struct drm_gem_object *obj)
176	{
177	int ret;
178
179	#if RTLNX_VER_MIN(4,11,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,5)
180	drm_helper_mode_fill_fb_struct(dev, &vbox_fb->base, mode_cmd);
181	#else
182	drm_helper_mode_fill_fb_struct(&vbox_fb->base, mode_cmd);
183	#endif
184	vbox_fb->obj = obj;
185	ret = drm_framebuffer_init(dev, &vbox_fb->base, &vbox_fb_funcs);
186	if (ret) {
187	DRM_ERROR("framebuffer init failed %d\n", ret);
188	return ret;
189	}
190
191	return 0;
192	}
193
194	static struct drm_framebuffer *vbox_user_framebuffer_create(
195	struct drm_device *dev,
196	struct drm_file *filp,
197	#if RTLNX_VER_MIN(4,5,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,3)
198	const struct drm_mode_fb_cmd2 *mode_cmd)
199	#else
200	struct drm_mode_fb_cmd2 *mode_cmd)
201	#endif
202	{
203	struct drm_gem_object *obj;
204	struct vbox_framebuffer *vbox_fb;
205	int ret = -ENOMEM;
206
207	#if RTLNX_VER_MIN(4,7,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,4)
208	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
209	#else
210	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
211	#endif
212	if (!obj)
213	return ERR_PTR(-ENOENT);
214
215	vbox_fb = kzalloc(sizeof(*vbox_fb), GFP_KERNEL);
216	if (!vbox_fb)
217	goto err_unref_obj;
218
219	ret = vbox_framebuffer_init(dev, vbox_fb, mode_cmd, obj);
220	if (ret)
221	goto err_free_vbox_fb;
222
223	return &vbox_fb->base;
224
225	err_free_vbox_fb:
226	kfree(vbox_fb);
227	err_unref_obj:
228	#if RTLNX_VER_MIN(5,9,0) \|\| RTLNX_RHEL_MIN(8,4) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
229	drm_gem_object_put(obj);
230	#else
231	drm_gem_object_put_unlocked(obj);
232	#endif
233	return ERR_PTR(ret);
234	}
235
236	static const struct drm_mode_config_funcs vbox_mode_funcs = {
237	.fb_create = vbox_user_framebuffer_create,
238	};
239
240	#if RTLNX_VER_MAX(4,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3)
241	# define pci_iomap_range(dev, bar, offset, maxlen) \
242	ioremap(pci_resource_start(dev, bar) + (offset), maxlen)
243	#endif
244
245	/**
246	* Tell the host about the views. This design originally targeted the
247	* Windows XP driver architecture and assumed that each screen would
248	* have a dedicated frame buffer with the command buffer following it,
249	* the whole being a "view". The host works out which screen a command
250	* buffer belongs to by checking whether it is in the first view, then
251	* whether it is in the second and so on. The first match wins. We
252	* cheat around this by making the first view be the managed memory
253	* plus the first command buffer, the second the same plus the second
254	* buffer and so on.
255	*/
256	static int vbox_set_views(struct vbox_private *vbox)
257	{
258	VBVAINFOVIEW *p;
259	int i;
260
261	p = VBoxHGSMIBufferAlloc(vbox->guest_pool, sizeof(*p),
262	HGSMI_CH_VBVA, VBVA_INFO_VIEW);
263	if (!p)
264	return -ENOMEM;
265
266	for (i = 0; i < vbox->num_crtcs; ++i) {
267	p->u32ViewIndex = i;
268	p->u32ViewOffset = 0;
269	p->u32ViewSize = vbox->available_vram_size +
270	i * VBVA_MIN_BUFFER_SIZE;
271	p->u32MaxScreenSize = vbox->available_vram_size;
272
273	VBoxHGSMIBufferSubmit(vbox->guest_pool, p);
274	}
275
276	VBoxHGSMIBufferFree(vbox->guest_pool, p);
277
278	return 0;
279	}
280
281	static int vbox_accel_init(struct vbox_private *vbox)
282	{
283	unsigned int i, ret;
284
285	vbox->vbva_info = devm_kcalloc(vbox->dev->dev, vbox->num_crtcs,
286	sizeof(*vbox->vbva_info), GFP_KERNEL);
287	if (!vbox->vbva_info)
288	return -ENOMEM;
289
290	/* Take a command buffer for each screen from the end of usable VRAM. */
291	vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
292
293	vbox->vbva_buffers = pci_iomap_range(VBOX_DRM_TO_PCI_DEV(vbox->dev), 0,
294	vbox->available_vram_size,
295	vbox->num_crtcs *
296	VBVA_MIN_BUFFER_SIZE);
297	if (!vbox->vbva_buffers)
298	return -ENOMEM;
299
300	for (i = 0; i < vbox->num_crtcs; ++i)
301	VBoxVBVASetupBufferContext(&vbox->vbva_info[i],
302	vbox->available_vram_size +
303	i * VBVA_MIN_BUFFER_SIZE,
304	VBVA_MIN_BUFFER_SIZE);
305
306	vbox_enable_accel(vbox);
307	ret = vbox_set_views(vbox);
308	if (ret)
309	goto err_pci_iounmap;
310
311	return 0;
312
313	err_pci_iounmap:
314	pci_iounmap(VBOX_DRM_TO_PCI_DEV(vbox->dev), vbox->vbva_buffers);
315	return ret;
316	}
317
318	static void vbox_accel_fini(struct vbox_private *vbox)
319	{
320	vbox_disable_accel(vbox);
321	pci_iounmap(VBOX_DRM_TO_PCI_DEV(vbox->dev), vbox->vbva_buffers);
322	}
323
324	/** Do we support the 4.3 plus mode hint reporting interface? */
325	static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
326	{
327	u32 have_hints, have_cursor;
328	int ret;
329
330	ret = VBoxQueryConfHGSMI(vbox->guest_pool,
331	VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
332	&have_hints);
333	if (ret)
334	return false;
335
336	ret = VBoxQueryConfHGSMI(vbox->guest_pool,
337	VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
338	&have_cursor);
339	if (ret)
340	return false;
341
342	return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
343	}
344
345	/**
346	* Our refresh timer call-back. Only used for guests without dirty rectangle
347	* support.
348	*/
349	static void vbox_refresh_timer(struct work_struct *work)
350	{
351	struct vbox_private *vbox = container_of(work, struct vbox_private,
352	refresh_work.work);
353	bool have_unblanked = false;
354	struct drm_crtc *crtci;
355
356	if (!vbox->need_refresh_timer)
357	return;
358	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list, head) {
359	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtci);
360	if (crtci->enabled && !vbox_crtc->blanked)
361	have_unblanked = true;
362	}
363	if (!have_unblanked)
364	return;
365	/* This forces a full refresh. */
366	vbox_enable_accel(vbox);
367	/* Schedule the next timer iteration. */
368	schedule_delayed_work(&vbox->refresh_work, VBOX_REFRESH_PERIOD);
369	}
370
371	static bool vbox_check_supported(u16 id)
372	{
373	u16 dispi_id;
374
375	vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
376	dispi_id = inw(VBE_DISPI_IOPORT_DATA);
377
378	return dispi_id == id;
379	}
380
381	/**
382	* Set up our heaps and data exchange buffers in VRAM before handing the rest
383	* to the memory manager.
384	*/
385	static int vbox_hw_init(struct vbox_private *vbox)
386	{
387	int ret = -ENOMEM;
388
389	vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
390	vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);
391
392	DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
393
394	/* Map guest-heap at end of vram */
395	vbox->guest_heap =
396	pci_iomap_range(VBOX_DRM_TO_PCI_DEV(vbox->dev), 0, GUEST_HEAP_OFFSET(vbox),
397	GUEST_HEAP_SIZE);
398	if (!vbox->guest_heap)
399	return -ENOMEM;
400
401	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
402	vbox->guest_pool = gen_pool_create(4, -1);
403	if (!vbox->guest_pool)
404	goto err_unmap_guest_heap;
405
406	ret = gen_pool_add_virt(vbox->guest_pool,
407	(unsigned long)vbox->guest_heap,
408	GUEST_HEAP_OFFSET(vbox),
409	GUEST_HEAP_USABLE_SIZE, -1);
410	if (ret)
411	goto err_destroy_guest_pool;
412
413	/* Reduce available VRAM size to reflect the guest heap. */
414	vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
415	/* Linux drm represents monitors as a 32-bit array. */
416	VBoxQueryConfHGSMI(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
417	&vbox->num_crtcs);
418	vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);
419
420	if (!have_hgsmi_mode_hints(vbox)) {
421	ret = -ENOTSUPP;
422	goto err_destroy_guest_pool;
423	}
424
425	vbox->last_mode_hints = devm_kcalloc(vbox->dev->dev, vbox->num_crtcs,
426	sizeof(VBVAMODEHINT),
427	GFP_KERNEL);
428	if (!vbox->last_mode_hints) {
429	ret = -ENOMEM;
430	goto err_destroy_guest_pool;
431	}
432
433	ret = vbox_accel_init(vbox);
434	if (ret)
435	goto err_destroy_guest_pool;
436
437	/* Set up the refresh timer for users which do not send dirty rectangles. */
438	INIT_DELAYED_WORK(&vbox->refresh_work, vbox_refresh_timer);
439
440	return 0;
441
442	err_destroy_guest_pool:
443	gen_pool_destroy(vbox->guest_pool);
444	err_unmap_guest_heap:
445	pci_iounmap(VBOX_DRM_TO_PCI_DEV(vbox->dev), vbox->guest_heap);
446	return ret;
447	}
448
449	static void vbox_hw_fini(struct vbox_private *vbox)
450	{
451	vbox->need_refresh_timer = false;
452	cancel_delayed_work(&vbox->refresh_work);
453	vbox_accel_fini(vbox);
454	gen_pool_destroy(vbox->guest_pool);
455	pci_iounmap(VBOX_DRM_TO_PCI_DEV(vbox->dev), vbox->guest_heap);
456	}
457
458	#if RTLNX_VER_MIN(4,19,0) \|\| RTLNX_RHEL_MIN(8,3)
459	int vbox_driver_load(struct drm_device *dev)
460	#else
461	int vbox_driver_load(struct drm_device *dev, unsigned long flags)
462	#endif
463	{
464	struct vbox_private *vbox;
465	int ret = 0;
466
467	if (!vbox_check_supported(VBE_DISPI_ID_HGSMI))
468	return -ENODEV;
469
470	vbox = devm_kzalloc(dev->dev, sizeof(*vbox), GFP_KERNEL);
471	if (!vbox)
472	return -ENOMEM;
473
474	dev->dev_private = vbox;
475	vbox->dev = dev;
476
477	mutex_init(&vbox->hw_mutex);
478
479	ret = vbox_hw_init(vbox);
480	if (ret)
481	return ret;
482
483	ret = vbox_mm_init(vbox);
484	if (ret)
485	goto err_hw_fini;
486
487	drm_mode_config_init(dev);
488
489	dev->mode_config.funcs = (void *)&vbox_mode_funcs;
490	dev->mode_config.min_width = 64;
491	dev->mode_config.min_height = 64;
492	dev->mode_config.preferred_depth = 24;
493	dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
494	dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
495
496	ret = vbox_mode_init(dev);
497	if (ret)
498	goto err_drm_mode_cleanup;
499
500	ret = vbox_irq_init(vbox);
501	if (ret)
502	goto err_mode_fini;
503
504	ret = vbox_fbdev_init(dev);
505	if (ret)
506	goto err_irq_fini;
507
508	return 0;
509
510	err_irq_fini:
511	vbox_irq_fini(vbox);
512	err_mode_fini:
513	vbox_mode_fini(dev);
514	err_drm_mode_cleanup:
515	drm_mode_config_cleanup(dev);
516	vbox_mm_fini(vbox);
517	err_hw_fini:
518	vbox_hw_fini(vbox);
519	return ret;
520	}
521
522	#if RTLNX_VER_MIN(4,11,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,5)
523	void vbox_driver_unload(struct drm_device *dev)
524	#else
525	int vbox_driver_unload(struct drm_device *dev)
526	#endif
527	{
528	struct vbox_private *vbox = dev->dev_private;
529
530	vbox_fbdev_fini(dev);
531	vbox_irq_fini(vbox);
532	vbox_mode_fini(dev);
533	drm_mode_config_cleanup(dev);
534	vbox_mm_fini(vbox);
535	vbox_hw_fini(vbox);
536	#if RTLNX_VER_MAX(4,11,0) && !RTLNX_RHEL_MAJ_PREREQ(7,5)
537	return 0;
538	#endif
539	}
540
541	/**
542	* @note this is described in the DRM framework documentation. AST does not
543	* have it, but we get an oops on driver unload if it is not present.
544	*/
545	void vbox_driver_lastclose(struct drm_device *dev)
546	{
547	struct vbox_private *vbox = dev->dev_private;
548
549	#if RTLNX_VER_MIN(3,16,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,1)
550	if (vbox->fbdev)
551	drm_fb_helper_restore_fbdev_mode_unlocked(&vbox->fbdev->helper);
552	#else
553	drm_modeset_lock_all(dev);
554	if (vbox->fbdev)
555	drm_fb_helper_restore_fbdev_mode(&vbox->fbdev->helper);
556	drm_modeset_unlock_all(dev);
557	#endif
558	}
559
560	int vbox_gem_create(struct drm_device *dev,
561	u32 size, bool iskernel, struct drm_gem_object **obj)
562	{
563	struct vbox_bo *vboxbo;
564	int ret;
565
566	*obj = NULL;
567
568	size = roundup(size, PAGE_SIZE);
569	if (size == 0)
570	{
571	DRM_ERROR("bad size\n");
572	return -EINVAL;
573	}
574
575	ret = vbox_bo_create(dev, size, 0, 0, &vboxbo);
576	if (ret) {
577	if (ret != -ERESTARTSYS)
578	DRM_ERROR("failed to allocate GEM object\n");
579	DRM_ERROR("failed to allocate GEM (%d)\n", ret);
580	return ret;
581	}
582
583	*obj = &vboxbo->gem;
584
585	return 0;
586	}
587
588	int vbox_dumb_create(struct drm_file *file,
589	struct drm_device dev, struct drm_mode_create_dumb args)
590	{
591	int ret;
592	struct drm_gem_object *gobj;
593	u32 handle;
594
595	args->pitch = args->width * ((args->bpp + 7) / 8);
596	args->size = args->pitch * args->height;
597
598	ret = vbox_gem_create(dev, args->size, false, &gobj);
599	if (ret)
600	return ret;
601
602	ret = drm_gem_handle_create(file, gobj, &handle);
603	#if RTLNX_VER_MIN(5,9,0) \|\| RTLNX_RHEL_MIN(8,4) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
604	drm_gem_object_put(gobj);
605	#else
606	drm_gem_object_put_unlocked(gobj);
607	#endif
608	if (ret)
609	return ret;
610
611	args->handle = handle;
612
613	return 0;
614	}
615
616	#if RTLNX_VER_MAX(3,12,0) && !RTLNX_RHEL_MAJ_PREREQ(7,3)
617	int vbox_dumb_destroy(struct drm_file *file,
618	struct drm_device *dev, u32 handle)
619	{
620	return drm_gem_handle_delete(file, handle);
621	}
622	#endif
623
624	#if RTLNX_VER_MAX(4,19,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
625	static void ttm_bo_put(struct ttm_buffer_object *bo)
626	{
627	ttm_bo_unref(&bo);
628	}
629	#endif
630
631	void vbox_gem_free_object(struct drm_gem_object *obj)
632	{
633	struct vbox_bo *vbox_bo = gem_to_vbox_bo(obj);
634
635	#if RTLNX_VER_MIN(5,14,0) \|\| RTLNX_RHEL_RANGE(8,6, 8,99)
636	/* Starting from kernel 5.14, there is a warning appears in dmesg
637	* on attempt to desroy pinned buffer object. Make sure it is unpinned. */
638	while (vbox_bo->bo.pin_count)
639	{
640	int ret;
641	ret = vbox_bo_unpin(vbox_bo);
642	if (ret)
643	{
644	DRM_ERROR("unable to unpin buffer object\n");
645	break;
646	}
647	}
648	#endif
649
650	ttm_bo_put(&vbox_bo->bo);
651	}
652
653	static inline u64 vbox_bo_mmap_offset(struct vbox_bo *bo)
654	{
655	#if RTLNX_VER_MIN(5,4,0) \|\| RTLNX_RHEL_MIN(8,3) \|\| RTLNX_SUSE_MAJ_PREREQ(15,3)
656	return drm_vma_node_offset_addr(&bo->bo.base.vma_node);
657	#elif RTLNX_VER_MAX(3,12,0) && !RTLNX_RHEL_MAJ_PREREQ(7,0)
658	return bo->bo.addr_space_offset;
659	#else
660	return drm_vma_node_offset_addr(&bo->bo.vma_node);
661	#endif /* >= 5.4.0 */
662	}
663
664	int
665	vbox_dumb_mmap_offset(struct drm_file *file,
666	struct drm_device *dev,
667	u32 handle, u64 *offset)
668	{
669	struct drm_gem_object *obj;
670	int ret = 0;
671	struct vbox_bo *bo;
672
673	mutex_lock(&dev->struct_mutex);
674	#if RTLNX_VER_MIN(4,7,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,4)
675	obj = drm_gem_object_lookup(file, handle);
676	#else
677	obj = drm_gem_object_lookup(dev, file, handle);
678	#endif
679	if (!obj) {
680	ret = -ENOENT;
681	goto out_unlock;
682	}
683
684	bo = gem_to_vbox_bo(obj);
685	*offset = vbox_bo_mmap_offset(bo);
686
687	#if RTLNX_VER_MIN(5,14,0) \|\| RTLNX_RHEL_RANGE(8,6, 8,99)
688	ret = drm_vma_node_allow(&bo->bo.base.vma_node, file);
689	if (ret)
690	{
691	DRM_ERROR("unable to grant previladges to user");
692	}
693	#endif
694
695	drm_gem_object_put(obj);
696
697	out_unlock:
698	mutex_unlock(&dev->struct_mutex);
699	return ret;
700	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_main.c@ 94330

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