xref: /openbmc/linux/drivers/gpu/drm/qxl/qxl_draw.c (revision 720cf96d)
1 /*
2  * Copyright 2011 Red Hat, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * on the rights to use, copy, modify, merge, publish, distribute, sub
8  * license, and/or sell copies of the Software, and to permit persons to whom
9  * the Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  */
22 
23 #include <linux/iosys-map.h>
24 
25 #include <drm/drm_fourcc.h>
26 #include <drm/drm_framebuffer.h>
27 
28 #include "qxl_drv.h"
29 #include "qxl_object.h"
30 
alloc_clips(struct qxl_device * qdev,struct qxl_release * release,unsigned int num_clips,struct qxl_bo ** clips_bo)31 static int alloc_clips(struct qxl_device *qdev,
32 		       struct qxl_release *release,
33 		       unsigned int num_clips,
34 		       struct qxl_bo **clips_bo)
35 {
36 	int size = sizeof(struct qxl_clip_rects) + sizeof(struct qxl_rect) * num_clips;
37 
38 	return qxl_alloc_bo_reserved(qdev, release, size, clips_bo);
39 }
40 
41 /* returns a pointer to the already allocated qxl_rect array inside
42  * the qxl_clip_rects. This is *not* the same as the memory allocated
43  * on the device, it is offset to qxl_clip_rects.chunk.data */
drawable_set_clipping(struct qxl_device * qdev,unsigned int num_clips,struct qxl_bo * clips_bo)44 static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
45 					      unsigned int num_clips,
46 					      struct qxl_bo *clips_bo)
47 {
48 	struct iosys_map map;
49 	struct qxl_clip_rects *dev_clips;
50 	int ret;
51 
52 	ret = qxl_bo_vmap_locked(clips_bo, &map);
53 	if (ret)
54 		return NULL;
55 	dev_clips = map.vaddr; /* TODO: Use mapping abstraction properly */
56 
57 	dev_clips->num_rects = num_clips;
58 	dev_clips->chunk.next_chunk = 0;
59 	dev_clips->chunk.prev_chunk = 0;
60 	dev_clips->chunk.data_size = sizeof(struct qxl_rect) * num_clips;
61 	return (struct qxl_rect *)dev_clips->chunk.data;
62 }
63 
64 static int
alloc_drawable(struct qxl_device * qdev,struct qxl_release ** release)65 alloc_drawable(struct qxl_device *qdev, struct qxl_release **release)
66 {
67 	return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_drawable),
68 					  QXL_RELEASE_DRAWABLE, release, NULL);
69 }
70 
71 static void
free_drawable(struct qxl_device * qdev,struct qxl_release * release)72 free_drawable(struct qxl_device *qdev, struct qxl_release *release)
73 {
74 	qxl_release_free(qdev, release);
75 }
76 
77 /* release needs to be reserved at this point */
78 static int
make_drawable(struct qxl_device * qdev,int surface,uint8_t type,const struct qxl_rect * rect,struct qxl_release * release)79 make_drawable(struct qxl_device *qdev, int surface, uint8_t type,
80 	      const struct qxl_rect *rect,
81 	      struct qxl_release *release)
82 {
83 	struct qxl_drawable *drawable;
84 	int i;
85 
86 	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
87 	if (!drawable)
88 		return -ENOMEM;
89 
90 	drawable->type = type;
91 
92 	drawable->surface_id = surface;		/* Only primary for now */
93 	drawable->effect = QXL_EFFECT_OPAQUE;
94 	drawable->self_bitmap = 0;
95 	drawable->self_bitmap_area.top = 0;
96 	drawable->self_bitmap_area.left = 0;
97 	drawable->self_bitmap_area.bottom = 0;
98 	drawable->self_bitmap_area.right = 0;
99 	/* FIXME: add clipping */
100 	drawable->clip.type = SPICE_CLIP_TYPE_NONE;
101 
102 	/*
103 	 * surfaces_dest[i] should apparently be filled out with the
104 	 * surfaces that we depend on, and surface_rects should be
105 	 * filled with the rectangles of those surfaces that we
106 	 * are going to use.
107 	 */
108 	for (i = 0; i < 3; ++i)
109 		drawable->surfaces_dest[i] = -1;
110 
111 	if (rect)
112 		drawable->bbox = *rect;
113 
114 	drawable->mm_time = qdev->rom->mm_clock;
115 	qxl_release_unmap(qdev, release, &drawable->release_info);
116 	return 0;
117 }
118 
119 /* push a draw command using the given clipping rectangles as
120  * the sources from the shadow framebuffer.
121  *
122  * Right now implementing with a single draw and a clip list. Clip
123  * lists are known to be a problem performance wise, this can be solved
124  * by treating them differently in the server.
125  */
qxl_draw_dirty_fb(struct qxl_device * qdev,struct drm_framebuffer * fb,struct qxl_bo * bo,unsigned int flags,unsigned int color,struct drm_clip_rect * clips,unsigned int num_clips,int inc,uint32_t dumb_shadow_offset)126 void qxl_draw_dirty_fb(struct qxl_device *qdev,
127 		       struct drm_framebuffer *fb,
128 		       struct qxl_bo *bo,
129 		       unsigned int flags, unsigned int color,
130 		       struct drm_clip_rect *clips,
131 		       unsigned int num_clips, int inc,
132 		       uint32_t dumb_shadow_offset)
133 {
134 	/*
135 	 * TODO: if flags & DRM_MODE_FB_DIRTY_ANNOTATE_FILL then we should
136 	 * send a fill command instead, much cheaper.
137 	 *
138 	 * See include/drm/drm_mode.h
139 	 */
140 	struct drm_clip_rect *clips_ptr;
141 	int i;
142 	int left, right, top, bottom;
143 	int width, height;
144 	struct qxl_drawable *drawable;
145 	struct qxl_rect drawable_rect;
146 	struct qxl_rect *rects;
147 	int stride = fb->pitches[0];
148 	/* depth is not actually interesting, we don't mask with it */
149 	int depth = fb->format->cpp[0] * 8;
150 	struct iosys_map surface_map;
151 	uint8_t *surface_base;
152 	struct qxl_release *release;
153 	struct qxl_bo *clips_bo;
154 	struct qxl_drm_image *dimage;
155 	int ret;
156 
157 	ret = alloc_drawable(qdev, &release);
158 	if (ret)
159 		return;
160 
161 	clips->x1 += dumb_shadow_offset;
162 	clips->x2 += dumb_shadow_offset;
163 
164 	left = clips->x1;
165 	right = clips->x2;
166 	top = clips->y1;
167 	bottom = clips->y2;
168 
169 	/* skip the first clip rect */
170 	for (i = 1, clips_ptr = clips + inc;
171 	     i < num_clips; i++, clips_ptr += inc) {
172 		left = min_t(int, left, (int)clips_ptr->x1);
173 		right = max_t(int, right, (int)clips_ptr->x2);
174 		top = min_t(int, top, (int)clips_ptr->y1);
175 		bottom = max_t(int, bottom, (int)clips_ptr->y2);
176 	}
177 
178 	width = right - left;
179 	height = bottom - top;
180 
181 	ret = alloc_clips(qdev, release, num_clips, &clips_bo);
182 	if (ret)
183 		goto out_free_drawable;
184 
185 	ret = qxl_image_alloc_objects(qdev, release,
186 				      &dimage,
187 				      height, stride);
188 	if (ret)
189 		goto out_free_clips;
190 
191 	/* do a reservation run over all the objects we just allocated */
192 	ret = qxl_release_reserve_list(release, true);
193 	if (ret)
194 		goto out_free_image;
195 
196 	drawable_rect.left = left;
197 	drawable_rect.right = right;
198 	drawable_rect.top = top;
199 	drawable_rect.bottom = bottom;
200 
201 	ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &drawable_rect,
202 			    release);
203 	if (ret)
204 		goto out_release_backoff;
205 
206 	ret = qxl_bo_vmap_locked(bo, &surface_map);
207 	if (ret)
208 		goto out_release_backoff;
209 	surface_base = surface_map.vaddr; /* TODO: Use mapping abstraction properly */
210 
211 	ret = qxl_image_init(qdev, release, dimage, surface_base,
212 			     left - dumb_shadow_offset,
213 			     top, width, height, depth, stride);
214 	qxl_bo_vunmap_locked(bo);
215 	if (ret)
216 		goto out_release_backoff;
217 
218 	rects = drawable_set_clipping(qdev, num_clips, clips_bo);
219 	if (!rects) {
220 		ret = -EINVAL;
221 		goto out_release_backoff;
222 	}
223 	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
224 
225 	drawable->clip.type = SPICE_CLIP_TYPE_RECTS;
226 	drawable->clip.data = qxl_bo_physical_address(qdev,
227 						      clips_bo, 0);
228 
229 	drawable->u.copy.src_area.top = 0;
230 	drawable->u.copy.src_area.bottom = height;
231 	drawable->u.copy.src_area.left = 0;
232 	drawable->u.copy.src_area.right = width;
233 
234 	drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
235 	drawable->u.copy.scale_mode = 0;
236 	drawable->u.copy.mask.flags = 0;
237 	drawable->u.copy.mask.pos.x = 0;
238 	drawable->u.copy.mask.pos.y = 0;
239 	drawable->u.copy.mask.bitmap = 0;
240 
241 	drawable->u.copy.src_bitmap = qxl_bo_physical_address(qdev, dimage->bo, 0);
242 	qxl_release_unmap(qdev, release, &drawable->release_info);
243 
244 	clips_ptr = clips;
245 	for (i = 0; i < num_clips; i++, clips_ptr += inc) {
246 		rects[i].left   = clips_ptr->x1;
247 		rects[i].right  = clips_ptr->x2;
248 		rects[i].top    = clips_ptr->y1;
249 		rects[i].bottom = clips_ptr->y2;
250 	}
251 	qxl_bo_vunmap_locked(clips_bo);
252 
253 	qxl_release_fence_buffer_objects(release);
254 	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
255 
256 out_release_backoff:
257 	if (ret)
258 		qxl_release_backoff_reserve_list(release);
259 out_free_image:
260 	qxl_image_free_objects(qdev, dimage);
261 out_free_clips:
262 	qxl_bo_unref(&clips_bo);
263 out_free_drawable:
264 	/* only free drawable on error */
265 	if (ret)
266 		free_drawable(qdev, release);
267 
268 }
269