linux/drivers/gpu/drm/qxl/qxl_draw.c
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   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}
 268