aboutsummaryrefslogtreecommitdiff
path: root/drivers/staging/vboxvideo/vbox_main.c
blob: e1fb70a42d320c8cfde625e8b60565c4497fc304 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
// SPDX-License-Identifier: MIT
/*
 * Copyright (C) 2013-2017 Oracle Corporation
 * This file is based on ast_main.c
 * Copyright 2012 Red Hat Inc.
 * Authors: Dave Airlie <airlied@redhat.com>,
 *          Michael Thayer <michael.thayer@oracle.com,
 *          Hans de Goede <hdegoede@redhat.com>
 */

#include <linux/vbox_err.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>

#include "vbox_drv.h"
#include "vboxvideo_guest.h"
#include "vboxvideo_vbe.h"

static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);

	if (vbox_fb->obj)
		drm_gem_object_put_unlocked(vbox_fb->obj);

	drm_framebuffer_cleanup(fb);
	kfree(fb);
}

void vbox_report_caps(struct vbox_private *vbox)
{
	u32 caps = VBVACAPS_DISABLE_CURSOR_INTEGRATION |
		   VBVACAPS_IRQ | VBVACAPS_USE_VBVA_ONLY;

	if (vbox->initial_mode_queried)
		caps |= VBVACAPS_VIDEO_MODE_HINTS;

	hgsmi_send_caps_info(vbox->guest_pool, caps);
}

/* Send information about dirty rectangles to VBVA. */
void vbox_framebuffer_dirty_rectangles(struct drm_framebuffer *fb,
				       struct drm_clip_rect *rects,
				       unsigned int num_rects)
{
	struct vbox_private *vbox = fb->dev->dev_private;
	struct drm_display_mode *mode;
	struct drm_crtc *crtc;
	int crtc_x, crtc_y;
	unsigned int i;

	mutex_lock(&vbox->hw_mutex);
	list_for_each_entry(crtc, &fb->dev->mode_config.crtc_list, head) {
		if (crtc->primary->state->fb != fb)
			continue;

		mode = &crtc->state->mode;
		crtc_x = crtc->primary->state->src_x >> 16;
		crtc_y = crtc->primary->state->src_y >> 16;

		for (i = 0; i < num_rects; ++i) {
			struct vbva_cmd_hdr cmd_hdr;
			unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;

			if (rects[i].x1 > crtc_x + mode->hdisplay ||
			    rects[i].y1 > crtc_y + mode->vdisplay ||
			    rects[i].x2 < crtc_x ||
			    rects[i].y2 < crtc_y)
				continue;

			cmd_hdr.x = (s16)rects[i].x1;
			cmd_hdr.y = (s16)rects[i].y1;
			cmd_hdr.w = (u16)rects[i].x2 - rects[i].x1;
			cmd_hdr.h = (u16)rects[i].y2 - rects[i].y1;

			if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id],
						      vbox->guest_pool))
				continue;

			vbva_write(&vbox->vbva_info[crtc_id], vbox->guest_pool,
				   &cmd_hdr, sizeof(cmd_hdr));
			vbva_buffer_end_update(&vbox->vbva_info[crtc_id]);
		}
	}
	mutex_unlock(&vbox->hw_mutex);
}

static int vbox_user_framebuffer_dirty(struct drm_framebuffer *fb,
				       struct drm_file *file_priv,
				       unsigned int flags, unsigned int color,
				       struct drm_clip_rect *rects,
				       unsigned int num_rects)
{
	vbox_framebuffer_dirty_rectangles(fb, rects, num_rects);

	return 0;
}

static const struct drm_framebuffer_funcs vbox_fb_funcs = {
	.destroy = vbox_user_framebuffer_destroy,
	.dirty = vbox_user_framebuffer_dirty,
};

int vbox_framebuffer_init(struct vbox_private *vbox,
			  struct vbox_framebuffer *vbox_fb,
			  const struct drm_mode_fb_cmd2 *mode_cmd,
			  struct drm_gem_object *obj)
{
	int ret;

	drm_helper_mode_fill_fb_struct(&vbox->ddev, &vbox_fb->base, mode_cmd);
	vbox_fb->obj = obj;
	ret = drm_framebuffer_init(&vbox->ddev, &vbox_fb->base, &vbox_fb_funcs);
	if (ret) {
		DRM_ERROR("framebuffer init failed %d\n", ret);
		return ret;
	}

	return 0;
}

static int vbox_accel_init(struct vbox_private *vbox)
{
	struct vbva_buffer *vbva;
	unsigned int i;

	vbox->vbva_info = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
				       sizeof(*vbox->vbva_info), GFP_KERNEL);
	if (!vbox->vbva_info)
		return -ENOMEM;

	/* Take a command buffer for each screen from the end of usable VRAM. */
	vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;

	vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0,
					     vbox->available_vram_size,
					     vbox->num_crtcs *
					     VBVA_MIN_BUFFER_SIZE);
	if (!vbox->vbva_buffers)
		return -ENOMEM;

	for (i = 0; i < vbox->num_crtcs; ++i) {
		vbva_setup_buffer_context(&vbox->vbva_info[i],
					  vbox->available_vram_size +
					  i * VBVA_MIN_BUFFER_SIZE,
					  VBVA_MIN_BUFFER_SIZE);
		vbva = (void __force *)vbox->vbva_buffers +
			i * VBVA_MIN_BUFFER_SIZE;
		if (!vbva_enable(&vbox->vbva_info[i],
				 vbox->guest_pool, vbva, i)) {
			/* very old host or driver error. */
			DRM_ERROR("vboxvideo: vbva_enable failed\n");
		}
	}

	return 0;
}

static void vbox_accel_fini(struct vbox_private *vbox)
{
	unsigned int i;

	for (i = 0; i < vbox->num_crtcs; ++i)
		vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);

	pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers);
}

/* Do we support the 4.3 plus mode hint reporting interface? */
static bool have_hgsmi_mode_hints(struct vbox_private *vbox)
{
	u32 have_hints, have_cursor;
	int ret;

	ret = hgsmi_query_conf(vbox->guest_pool,
			       VBOX_VBVA_CONF32_MODE_HINT_REPORTING,
			       &have_hints);
	if (ret)
		return false;

	ret = hgsmi_query_conf(vbox->guest_pool,
			       VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING,
			       &have_cursor);
	if (ret)
		return false;

	return have_hints == VINF_SUCCESS && have_cursor == VINF_SUCCESS;
}

bool vbox_check_supported(u16 id)
{
	u16 dispi_id;

	vbox_write_ioport(VBE_DISPI_INDEX_ID, id);
	dispi_id = inw(VBE_DISPI_IOPORT_DATA);

	return dispi_id == id;
}

int vbox_hw_init(struct vbox_private *vbox)
{
	int ret = -ENOMEM;

	vbox->full_vram_size = inl(VBE_DISPI_IOPORT_DATA);
	vbox->any_pitch = vbox_check_supported(VBE_DISPI_ID_ANYX);

	DRM_INFO("VRAM %08x\n", vbox->full_vram_size);

	/* Map guest-heap at end of vram */
	vbox->guest_heap =
	    pci_iomap_range(vbox->ddev.pdev, 0, GUEST_HEAP_OFFSET(vbox),
			    GUEST_HEAP_SIZE);
	if (!vbox->guest_heap)
		return -ENOMEM;

	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
	vbox->guest_pool = gen_pool_create(4, -1);
	if (!vbox->guest_pool)
		goto err_unmap_guest_heap;

	ret = gen_pool_add_virt(vbox->guest_pool,
				(unsigned long)vbox->guest_heap,
				GUEST_HEAP_OFFSET(vbox),
				GUEST_HEAP_USABLE_SIZE, -1);
	if (ret)
		goto err_destroy_guest_pool;

	ret = hgsmi_test_query_conf(vbox->guest_pool);
	if (ret) {
		DRM_ERROR("vboxvideo: hgsmi_test_query_conf failed\n");
		goto err_destroy_guest_pool;
	}

	/* Reduce available VRAM size to reflect the guest heap. */
	vbox->available_vram_size = GUEST_HEAP_OFFSET(vbox);
	/* Linux drm represents monitors as a 32-bit array. */
	hgsmi_query_conf(vbox->guest_pool, VBOX_VBVA_CONF32_MONITOR_COUNT,
			 &vbox->num_crtcs);
	vbox->num_crtcs = clamp_t(u32, vbox->num_crtcs, 1, VBOX_MAX_SCREENS);

	if (!have_hgsmi_mode_hints(vbox)) {
		ret = -ENOTSUPP;
		goto err_destroy_guest_pool;
	}

	vbox->last_mode_hints = devm_kcalloc(vbox->ddev.dev, vbox->num_crtcs,
					     sizeof(struct vbva_modehint),
					     GFP_KERNEL);
	if (!vbox->last_mode_hints) {
		ret = -ENOMEM;
		goto err_destroy_guest_pool;
	}

	ret = vbox_accel_init(vbox);
	if (ret)
		goto err_destroy_guest_pool;

	return 0;

err_destroy_guest_pool:
	gen_pool_destroy(vbox->guest_pool);
err_unmap_guest_heap:
	pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
	return ret;
}

void vbox_hw_fini(struct vbox_private *vbox)
{
	vbox_accel_fini(vbox);
	gen_pool_destroy(vbox->guest_pool);
	pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
}

int vbox_gem_create(struct vbox_private *vbox,
		    u32 size, bool iskernel, struct drm_gem_object **obj)
{
	struct vbox_bo *vboxbo;
	int ret;

	*obj = NULL;

	size = roundup(size, PAGE_SIZE);
	if (size == 0)
		return -EINVAL;

	ret = vbox_bo_create(vbox, size, 0, 0, &vboxbo);
	if (ret) {
		if (ret != -ERESTARTSYS)
			DRM_ERROR("failed to allocate GEM object\n");
		return ret;
	}

	*obj = &vboxbo->gem;

	return 0;
}

int vbox_dumb_create(struct drm_file *file,
		     struct drm_device *dev, struct drm_mode_create_dumb *args)
{
	struct vbox_private *vbox =
		container_of(dev, struct vbox_private, ddev);
	struct drm_gem_object *gobj;
	u32 handle;
	int ret;

	args->pitch = args->width * ((args->bpp + 7) / 8);
	args->size = args->pitch * args->height;

	ret = vbox_gem_create(vbox, args->size, false, &gobj);
	if (ret)
		return ret;

	ret = drm_gem_handle_create(file, gobj, &handle);
	drm_gem_object_put_unlocked(gobj);
	if (ret)
		return ret;

	args->handle = handle;

	return 0;
}

void vbox_gem_free_object(struct drm_gem_object *obj)
{
	struct vbox_bo *vbox_bo = gem_to_vbox_bo(obj);

	ttm_bo_put(&vbox_bo->bo);
}

static inline u64 vbox_bo_mmap_offset(struct vbox_bo *bo)
{
	return drm_vma_node_offset_addr(&bo->bo.vma_node);
}

int
vbox_dumb_mmap_offset(struct drm_file *file,
		      struct drm_device *dev,
		      u32 handle, u64 *offset)
{
	struct drm_gem_object *obj;
	int ret;
	struct vbox_bo *bo;

	mutex_lock(&dev->struct_mutex);
	obj = drm_gem_object_lookup(file, handle);
	if (!obj) {
		ret = -ENOENT;
		goto out_unlock;
	}

	bo = gem_to_vbox_bo(obj);
	*offset = vbox_bo_mmap_offset(bo);

	drm_gem_object_put(obj);
	ret = 0;

out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}