aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/qxl/qxl_image.c
blob: ffff54e5fb318b5aff3394f648e2a0efa6369ba5 (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
/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Dave Airlie
 *          Alon Levy
 */

#include <linux/gfp.h>
#include <linux/slab.h>

#include "qxl_drv.h"
#include "qxl_object.h"

static int
qxl_allocate_chunk(struct qxl_device *qdev,
		   struct qxl_release *release,
		   struct qxl_drm_image *image,
		   unsigned int chunk_size)
{
	struct qxl_drm_chunk *chunk;
	int ret;

	chunk = kmalloc(sizeof(struct qxl_drm_chunk), GFP_KERNEL);
	if (!chunk)
		return -ENOMEM;

	ret = qxl_alloc_bo_reserved(qdev, release, chunk_size, &chunk->bo);
	if (ret) {
		kfree(chunk);
		return ret;
	}

	list_add_tail(&chunk->head, &image->chunk_list);
	return 0;
}

int
qxl_image_alloc_objects(struct qxl_device *qdev,
			struct qxl_release *release,
			struct qxl_drm_image **image_ptr,
			int height, int stride)
{
	struct qxl_drm_image *image;
	int ret;

	image = kmalloc(sizeof(struct qxl_drm_image), GFP_KERNEL);
	if (!image)
		return -ENOMEM;

	INIT_LIST_HEAD(&image->chunk_list);

	ret = qxl_alloc_bo_reserved(qdev, release, sizeof(struct qxl_image), &image->bo);
	if (ret) {
		kfree(image);
		return ret;
	}

	ret = qxl_allocate_chunk(qdev, release, image, sizeof(struct qxl_data_chunk) + stride * height);
	if (ret) {
		qxl_bo_unref(&image->bo);
		kfree(image);
		return ret;
	}
	*image_ptr = image;
	return 0;
}

void qxl_image_free_objects(struct qxl_device *qdev, struct qxl_drm_image *dimage)
{
	struct qxl_drm_chunk *chunk, *tmp;

	list_for_each_entry_safe(chunk, tmp, &dimage->chunk_list, head) {
		qxl_bo_unref(&chunk->bo);
		kfree(chunk);
	}

	qxl_bo_unref(&dimage->bo);
	kfree(dimage);
}

static int
qxl_image_init_helper(struct qxl_device *qdev,
		      struct qxl_release *release,
		      struct qxl_drm_image *dimage,
		      const uint8_t *data,
		      int width, int height,
		      int depth, unsigned int hash,
		      int stride)
{
	struct qxl_drm_chunk *drv_chunk;
	struct qxl_image *image;
	struct qxl_data_chunk *chunk;
	int i;
	int chunk_stride;
	int linesize = width * depth / 8;
	struct qxl_bo *chunk_bo, *image_bo;
	void *ptr;
	/* Chunk */
	/* FIXME: Check integer overflow */
	/* TODO: variable number of chunks */

	drv_chunk = list_first_entry(&dimage->chunk_list, struct qxl_drm_chunk, head);

	chunk_bo = drv_chunk->bo;
	chunk_stride = stride; /* TODO: should use linesize, but it renders
				  wrong (check the bitmaps are sent correctly
				  first) */

	ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, 0);
	chunk = ptr;
	chunk->data_size = height * chunk_stride;
	chunk->prev_chunk = 0;
	chunk->next_chunk = 0;
	qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);

	{
		void *k_data, *i_data;
		int remain;
		int page;
		int size;

		if (stride == linesize && chunk_stride == stride) {
			remain = linesize * height;
			page = 0;
			i_data = (void *)data;

			while (remain > 0) {
				ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page << PAGE_SHIFT);

				if (page == 0) {
					chunk = ptr;
					k_data = chunk->data;
					size = PAGE_SIZE - offsetof(struct qxl_data_chunk, data);
				} else {
					k_data = ptr;
					size = PAGE_SIZE;
				}
				size = min(size, remain);

				memcpy(k_data, i_data, size);

				qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
				i_data += size;
				remain -= size;
				page++;
			}
		} else {
			unsigned int page_base, page_offset, out_offset;

			for (i = 0 ; i < height ; ++i) {
				i_data = (void *)data + i * stride;
				remain = linesize;
				out_offset = offsetof(struct qxl_data_chunk, data) + i * chunk_stride;

				while (remain > 0) {
					page_base = out_offset & PAGE_MASK;
					page_offset = offset_in_page(out_offset);
					size = min((int)(PAGE_SIZE - page_offset), remain);

					ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page_base);
					k_data = ptr + page_offset;
					memcpy(k_data, i_data, size);
					qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
					remain -= size;
					i_data += size;
					out_offset += size;
				}
			}
		}
	}
	qxl_bo_vunmap_locked(chunk_bo);

	image_bo = dimage->bo;
	ptr = qxl_bo_kmap_atomic_page(qdev, image_bo, 0);
	image = ptr;

	image->descriptor.id = 0;
	image->descriptor.type = SPICE_IMAGE_TYPE_BITMAP;

	image->descriptor.flags = 0;
	image->descriptor.width = width;
	image->descriptor.height = height;

	switch (depth) {
	case 1:
		/* TODO: BE? check by arch? */
		image->u.bitmap.format = SPICE_BITMAP_FMT_1BIT_BE;
		break;
	case 24:
		image->u.bitmap.format = SPICE_BITMAP_FMT_24BIT;
		break;
	case 32:
		image->u.bitmap.format = SPICE_BITMAP_FMT_32BIT;
		break;
	default:
		DRM_ERROR("unsupported image bit depth\n");
		qxl_bo_kunmap_atomic_page(qdev, image_bo, ptr);
		return -EINVAL;
	}
	image->u.bitmap.flags = QXL_BITMAP_TOP_DOWN;
	image->u.bitmap.x = width;
	image->u.bitmap.y = height;
	image->u.bitmap.stride = chunk_stride;
	image->u.bitmap.palette = 0;
	image->u.bitmap.data = qxl_bo_physical_address(qdev, chunk_bo, 0);

	qxl_bo_kunmap_atomic_page(qdev, image_bo, ptr);

	return 0;
}

int qxl_image_init(struct qxl_device *qdev,
		     struct qxl_release *release,
		     struct qxl_drm_image *dimage,
		     const uint8_t *data,
		     int x, int y, int width, int height,
		     int depth, int stride)
{
	data += y * stride + x * (depth / 8);
	return qxl_image_init_helper(qdev, release, dimage, data,
				       width, height, depth, 0, stride);
}