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/dma-buf-map.h>
 24
 25#include <drm/drm_fourcc.h>
 26
 27#include "qxl_drv.h"
 28#include "qxl_object.h"
 29
 30static int alloc_clips(struct qxl_device *qdev,
 31		       struct qxl_release *release,
 32		       unsigned int num_clips,
 33		       struct qxl_bo **clips_bo)
 34{
 35	int size = sizeof(struct qxl_clip_rects) + sizeof(struct qxl_rect) * num_clips;
 36
 37	return qxl_alloc_bo_reserved(qdev, release, size, clips_bo);
 38}
 39
 40/* returns a pointer to the already allocated qxl_rect array inside
 41 * the qxl_clip_rects. This is *not* the same as the memory allocated
 42 * on the device, it is offset to qxl_clip_rects.chunk.data */
 43static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
 44					      unsigned int num_clips,
 45					      struct qxl_bo *clips_bo)
 46{
 47	struct dma_buf_map map;
 48	struct qxl_clip_rects *dev_clips;
 49	int ret;
 50
 51	ret = qxl_bo_vmap_locked(clips_bo, &map);
 52	if (ret)
 53		return NULL;
 54	dev_clips = map.vaddr; /* TODO: Use mapping abstraction properly */
 55
 56	dev_clips->num_rects = num_clips;
 57	dev_clips->chunk.next_chunk = 0;
 58	dev_clips->chunk.prev_chunk = 0;
 59	dev_clips->chunk.data_size = sizeof(struct qxl_rect) * num_clips;
 60	return (struct qxl_rect *)dev_clips->chunk.data;
 61}
 62
 63static int
 64alloc_drawable(struct qxl_device *qdev, struct qxl_release **release)
 65{
 66	return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_drawable),
 67					  QXL_RELEASE_DRAWABLE, release, NULL);
 68}
 69
 70static void
 71free_drawable(struct qxl_device *qdev, struct qxl_release *release)
 72{
 73	qxl_release_free(qdev, release);
 74}
 75
 76/* release needs to be reserved at this point */
 77static int
 78make_drawable(struct qxl_device *qdev, int surface, uint8_t type,
 79	      const struct qxl_rect *rect,
 80	      struct qxl_release *release)
 81{
 82	struct qxl_drawable *drawable;
 83	int i;
 84
 85	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
 86	if (!drawable)
 87		return -ENOMEM;
 88
 89	drawable->type = type;
 90
 91	drawable->surface_id = surface;		/* Only primary for now */
 92	drawable->effect = QXL_EFFECT_OPAQUE;
 93	drawable->self_bitmap = 0;
 94	drawable->self_bitmap_area.top = 0;
 95	drawable->self_bitmap_area.left = 0;
 96	drawable->self_bitmap_area.bottom = 0;
 97	drawable->self_bitmap_area.right = 0;
 98	/* FIXME: add clipping */
 99	drawable->clip.type = SPICE_CLIP_TYPE_NONE;
100
101	/*
102	 * surfaces_dest[i] should apparently be filled out with the
103	 * surfaces that we depend on, and surface_rects should be
104	 * filled with the rectangles of those surfaces that we
105	 * are going to use.
106	 */
107	for (i = 0; i < 3; ++i)
108		drawable->surfaces_dest[i] = -1;
109
110	if (rect)
111		drawable->bbox = *rect;
112
113	drawable->mm_time = qdev->rom->mm_clock;
114	qxl_release_unmap(qdev, release, &drawable->release_info);
115	return 0;
116}
117
118/* push a draw command using the given clipping rectangles as
119 * the sources from the shadow framebuffer.
120 *
121 * Right now implementing with a single draw and a clip list. Clip
122 * lists are known to be a problem performance wise, this can be solved
123 * by treating them differently in the server.
124 */
125void qxl_draw_dirty_fb(struct qxl_device *qdev,
126		       struct drm_framebuffer *fb,
127		       struct qxl_bo *bo,
128		       unsigned int flags, unsigned int color,
129		       struct drm_clip_rect *clips,
130		       unsigned int num_clips, int inc,
131		       uint32_t dumb_shadow_offset)
132{
133	/*
134	 * TODO: if flags & DRM_MODE_FB_DIRTY_ANNOTATE_FILL then we should
135	 * send a fill command instead, much cheaper.
136	 *
137	 * See include/drm/drm_mode.h
138	 */
139	struct drm_clip_rect *clips_ptr;
140	int i;
141	int left, right, top, bottom;
142	int width, height;
143	struct qxl_drawable *drawable;
144	struct qxl_rect drawable_rect;
145	struct qxl_rect *rects;
146	int stride = fb->pitches[0];
147	/* depth is not actually interesting, we don't mask with it */
148	int depth = fb->format->cpp[0] * 8;
149	struct dma_buf_map surface_map;
150	uint8_t *surface_base;
151	struct qxl_release *release;
152	struct qxl_bo *clips_bo;
153	struct qxl_drm_image *dimage;
154	int ret;
155
156	ret = alloc_drawable(qdev, &release);
157	if (ret)
158		return;
159
160	clips->x1 += dumb_shadow_offset;
161	clips->x2 += dumb_shadow_offset;
162
163	left = clips->x1;
164	right = clips->x2;
165	top = clips->y1;
166	bottom = clips->y2;
167
168	/* skip the first clip rect */
169	for (i = 1, clips_ptr = clips + inc;
170	     i < num_clips; i++, clips_ptr += inc) {
171		left = min_t(int, left, (int)clips_ptr->x1);
172		right = max_t(int, right, (int)clips_ptr->x2);
173		top = min_t(int, top, (int)clips_ptr->y1);
174		bottom = max_t(int, bottom, (int)clips_ptr->y2);
175	}
176
177	width = right - left;
178	height = bottom - top;
179
180	ret = alloc_clips(qdev, release, num_clips, &clips_bo);
181	if (ret)
182		goto out_free_drawable;
183
184	ret = qxl_image_alloc_objects(qdev, release,
185				      &dimage,
186				      height, stride);
187	if (ret)
188		goto out_free_clips;
189
190	/* do a reservation run over all the objects we just allocated */
191	ret = qxl_release_reserve_list(release, true);
192	if (ret)
193		goto out_free_image;
194
195	drawable_rect.left = left;
196	drawable_rect.right = right;
197	drawable_rect.top = top;
198	drawable_rect.bottom = bottom;
199
200	ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &drawable_rect,
201			    release);
202	if (ret)
203		goto out_release_backoff;
204
205	ret = qxl_bo_vmap_locked(bo, &surface_map);
206	if (ret)
207		goto out_release_backoff;
208	surface_base = surface_map.vaddr; /* TODO: Use mapping abstraction properly */
209
210	ret = qxl_image_init(qdev, release, dimage, surface_base,
211			     left - dumb_shadow_offset,
212			     top, width, height, depth, stride);
213	qxl_bo_vunmap_locked(bo);
214	if (ret)
215		goto out_release_backoff;
216
217	rects = drawable_set_clipping(qdev, num_clips, clips_bo);
218	if (!rects) {
219		ret = -EINVAL;
220		goto out_release_backoff;
221	}
222	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
223
224	drawable->clip.type = SPICE_CLIP_TYPE_RECTS;
225	drawable->clip.data = qxl_bo_physical_address(qdev,
226						      clips_bo, 0);
227
228	drawable->u.copy.src_area.top = 0;
229	drawable->u.copy.src_area.bottom = height;
230	drawable->u.copy.src_area.left = 0;
231	drawable->u.copy.src_area.right = width;
232
233	drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
234	drawable->u.copy.scale_mode = 0;
235	drawable->u.copy.mask.flags = 0;
236	drawable->u.copy.mask.pos.x = 0;
237	drawable->u.copy.mask.pos.y = 0;
238	drawable->u.copy.mask.bitmap = 0;
239
240	drawable->u.copy.src_bitmap = qxl_bo_physical_address(qdev, dimage->bo, 0);
241	qxl_release_unmap(qdev, release, &drawable->release_info);
242
243	clips_ptr = clips;
244	for (i = 0; i < num_clips; i++, clips_ptr += inc) {
245		rects[i].left   = clips_ptr->x1;
246		rects[i].right  = clips_ptr->x2;
247		rects[i].top    = clips_ptr->y1;
248		rects[i].bottom = clips_ptr->y2;
249	}
250	qxl_bo_vunmap_locked(clips_bo);
251
252	qxl_release_fence_buffer_objects(release);
253	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
254
255out_release_backoff:
256	if (ret)
257		qxl_release_backoff_reserve_list(release);
258out_free_image:
259	qxl_image_free_objects(qdev, dimage);
260out_free_clips:
261	qxl_bo_unref(&clips_bo);
262out_free_drawable:
263	/* only free drawable on error */
264	if (ret)
265		free_drawable(qdev, release);
266
267}