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 <drm/drm_fourcc.h>
 24
 25#include "qxl_drv.h"
 26#include "qxl_object.h"
 27
 28static int alloc_clips(struct qxl_device *qdev,
 29		       struct qxl_release *release,
 30		       unsigned int num_clips,
 31		       struct qxl_bo **clips_bo)
 32{
 33	int size = sizeof(struct qxl_clip_rects) + sizeof(struct qxl_rect) * num_clips;
 34
 35	return qxl_alloc_bo_reserved(qdev, release, size, clips_bo);
 36}
 37
 38/* returns a pointer to the already allocated qxl_rect array inside
 39 * the qxl_clip_rects. This is *not* the same as the memory allocated
 40 * on the device, it is offset to qxl_clip_rects.chunk.data */
 41static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
 42					      unsigned int num_clips,
 43					      struct qxl_bo *clips_bo)
 44{
 45	struct qxl_clip_rects *dev_clips;
 46	int ret;
 47
 48	ret = qxl_bo_kmap(clips_bo, (void **)&dev_clips);
 49	if (ret) {
 50		return NULL;
 51	}
 52	dev_clips->num_rects = num_clips;
 53	dev_clips->chunk.next_chunk = 0;
 54	dev_clips->chunk.prev_chunk = 0;
 55	dev_clips->chunk.data_size = sizeof(struct qxl_rect) * num_clips;
 56	return (struct qxl_rect *)dev_clips->chunk.data;
 57}
 58
 59static int
 60alloc_drawable(struct qxl_device *qdev, struct qxl_release **release)
 61{
 62	return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_drawable),
 63					  QXL_RELEASE_DRAWABLE, release, NULL);
 64}
 65
 66static void
 67free_drawable(struct qxl_device *qdev, struct qxl_release *release)
 68{
 69	qxl_release_free(qdev, release);
 70}
 71
 72/* release needs to be reserved at this point */
 73static int
 74make_drawable(struct qxl_device *qdev, int surface, uint8_t type,
 75	      const struct qxl_rect *rect,
 76	      struct qxl_release *release)
 77{
 78	struct qxl_drawable *drawable;
 79	int i;
 80
 81	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
 82	if (!drawable)
 83		return -ENOMEM;
 84
 85	drawable->type = type;
 86
 87	drawable->surface_id = surface;		/* Only primary for now */
 88	drawable->effect = QXL_EFFECT_OPAQUE;
 89	drawable->self_bitmap = 0;
 90	drawable->self_bitmap_area.top = 0;
 91	drawable->self_bitmap_area.left = 0;
 92	drawable->self_bitmap_area.bottom = 0;
 93	drawable->self_bitmap_area.right = 0;
 94	/* FIXME: add clipping */
 95	drawable->clip.type = SPICE_CLIP_TYPE_NONE;
 96
 97	/*
 98	 * surfaces_dest[i] should apparently be filled out with the
 99	 * surfaces that we depend on, and surface_rects should be
100	 * filled with the rectangles of those surfaces that we
101	 * are going to use.
102	 */
103	for (i = 0; i < 3; ++i)
104		drawable->surfaces_dest[i] = -1;
105
106	if (rect)
107		drawable->bbox = *rect;
108
109	drawable->mm_time = qdev->rom->mm_clock;
110	qxl_release_unmap(qdev, release, &drawable->release_info);
111	return 0;
112}
113
114/* push a draw command using the given clipping rectangles as
115 * the sources from the shadow framebuffer.
116 *
117 * Right now implementing with a single draw and a clip list. Clip
118 * lists are known to be a problem performance wise, this can be solved
119 * by treating them differently in the server.
120 */
121void qxl_draw_dirty_fb(struct qxl_device *qdev,
122		       struct drm_framebuffer *fb,
123		       struct qxl_bo *bo,
124		       unsigned int flags, unsigned int color,
125		       struct drm_clip_rect *clips,
126		       unsigned int num_clips, int inc,
127		       uint32_t dumb_shadow_offset)
128{
129	/*
130	 * TODO: if flags & DRM_MODE_FB_DIRTY_ANNOTATE_FILL then we should
131	 * send a fill command instead, much cheaper.
132	 *
133	 * See include/drm/drm_mode.h
134	 */
135	struct drm_clip_rect *clips_ptr;
136	int i;
137	int left, right, top, bottom;
138	int width, height;
139	struct qxl_drawable *drawable;
140	struct qxl_rect drawable_rect;
141	struct qxl_rect *rects;
142	int stride = fb->pitches[0];
143	/* depth is not actually interesting, we don't mask with it */
144	int depth = fb->format->cpp[0] * 8;
145	uint8_t *surface_base;
146	struct qxl_release *release;
147	struct qxl_bo *clips_bo;
148	struct qxl_drm_image *dimage;
149	int ret;
150
151	ret = alloc_drawable(qdev, &release);
152	if (ret)
153		return;
154
155	clips->x1 += dumb_shadow_offset;
156	clips->x2 += dumb_shadow_offset;
157
158	left = clips->x1;
159	right = clips->x2;
160	top = clips->y1;
161	bottom = clips->y2;
162
163	/* skip the first clip rect */
164	for (i = 1, clips_ptr = clips + inc;
165	     i < num_clips; i++, clips_ptr += inc) {
166		left = min_t(int, left, (int)clips_ptr->x1);
167		right = max_t(int, right, (int)clips_ptr->x2);
168		top = min_t(int, top, (int)clips_ptr->y1);
169		bottom = max_t(int, bottom, (int)clips_ptr->y2);
170	}
171
172	width = right - left;
173	height = bottom - top;
174
175	ret = alloc_clips(qdev, release, num_clips, &clips_bo);
176	if (ret)
177		goto out_free_drawable;
178
179	ret = qxl_image_alloc_objects(qdev, release,
180				      &dimage,
181				      height, stride);
182	if (ret)
183		goto out_free_clips;
184
185	/* do a reservation run over all the objects we just allocated */
186	ret = qxl_release_reserve_list(release, true);
187	if (ret)
188		goto out_free_image;
189
190	drawable_rect.left = left;
191	drawable_rect.right = right;
192	drawable_rect.top = top;
193	drawable_rect.bottom = bottom;
194
195	ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &drawable_rect,
196			    release);
197	if (ret)
198		goto out_release_backoff;
199
200	ret = qxl_bo_kmap(bo, (void **)&surface_base);
201	if (ret)
202		goto out_release_backoff;
203
204	ret = qxl_image_init(qdev, release, dimage, surface_base,
205			     left - dumb_shadow_offset,
206			     top, width, height, depth, stride);
207	qxl_bo_kunmap(bo);
208	if (ret)
209		goto out_release_backoff;
210
211	rects = drawable_set_clipping(qdev, num_clips, clips_bo);
212	if (!rects) {
213		ret = -EINVAL;
214		goto out_release_backoff;
215	}
216	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
217
218	drawable->clip.type = SPICE_CLIP_TYPE_RECTS;
219	drawable->clip.data = qxl_bo_physical_address(qdev,
220						      clips_bo, 0);
221
222	drawable->u.copy.src_area.top = 0;
223	drawable->u.copy.src_area.bottom = height;
224	drawable->u.copy.src_area.left = 0;
225	drawable->u.copy.src_area.right = width;
226
227	drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
228	drawable->u.copy.scale_mode = 0;
229	drawable->u.copy.mask.flags = 0;
230	drawable->u.copy.mask.pos.x = 0;
231	drawable->u.copy.mask.pos.y = 0;
232	drawable->u.copy.mask.bitmap = 0;
233
234	drawable->u.copy.src_bitmap = qxl_bo_physical_address(qdev, dimage->bo, 0);
235	qxl_release_unmap(qdev, release, &drawable->release_info);
236
237	clips_ptr = clips;
238	for (i = 0; i < num_clips; i++, clips_ptr += inc) {
239		rects[i].left   = clips_ptr->x1;
240		rects[i].right  = clips_ptr->x2;
241		rects[i].top    = clips_ptr->y1;
242		rects[i].bottom = clips_ptr->y2;
243	}
244	qxl_bo_kunmap(clips_bo);
245
246	qxl_release_fence_buffer_objects(release);
247	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
248
249out_release_backoff:
250	if (ret)
251		qxl_release_backoff_reserve_list(release);
252out_free_image:
253	qxl_image_free_objects(qdev, dimage);
254out_free_clips:
255	qxl_bo_unref(&clips_bo);
256out_free_drawable:
257	/* only free drawable on error */
258	if (ret)
259		free_drawable(qdev, release);
260
261}