drivers/gpu/drm/virtio/virtgpu_plane.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <drm/drm_atomic_helper.h>
  27 #include <drm/drm_damage_helper.h>
  28 #include <drm/drm_fourcc.h>
  29 #include <drm/drm_plane_helper.h>
  30
  31 #include "virtgpu_drv.h"
  32
  33 static const uint32_t virtio_gpu_formats[] = {
  34         DRM_FORMAT_HOST_XRGB8888,
  35 };
  36
  37 static const uint32_t virtio_gpu_cursor_formats[] = {
  38         DRM_FORMAT_HOST_ARGB8888,
  39 };
  40
  41 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
  42 {
  43         uint32_t format;
  44
  45         switch (drm_fourcc) {
  46         case DRM_FORMAT_XRGB8888:
  47                 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
  48                 break;
  49         case DRM_FORMAT_ARGB8888:
  50                 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
  51                 break;
  52         case DRM_FORMAT_BGRX8888:
  53                 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
  54                 break;
  55         case DRM_FORMAT_BGRA8888:
  56                 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
  57                 break;
  58         default:
  59                 /*
  60                  * This should not happen, we handle everything listed
  61                  * in virtio_gpu_formats[].
  62                  */
  63                 format = 0;
  64                 break;
  65         }
  66         WARN_ON(format == 0);
  67         return format;
  68 }
  69
  70 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
  71 {
  72         drm_plane_cleanup(plane);
  73         kfree(plane);
  74 }
  75
  76 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
  77         .update_plane           = drm_atomic_helper_update_plane,
  78         .disable_plane          = drm_atomic_helper_disable_plane,
  79         .destroy                = virtio_gpu_plane_destroy,
  80         .reset                  = drm_atomic_helper_plane_reset,
  81         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  82         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  83 };
  84
  85 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
  86                                          struct drm_atomic_state *state)
  87 {
  88         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
  89                                                                                  plane);
  90         bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
  91         struct drm_crtc_state *crtc_state;
  92         int ret;
  93
  94         if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
  95                 return 0;
  96
  97         crtc_state = drm_atomic_get_crtc_state(state,
  98                                                new_plane_state->crtc);
  99         if (IS_ERR(crtc_state))
 100                 return PTR_ERR(crtc_state);
 101
 102         ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 103                                                   DRM_PLANE_HELPER_NO_SCALING,
 104                                                   DRM_PLANE_HELPER_NO_SCALING,
 105                                                   is_cursor, true);
 106         return ret;
 107 }
 108
 109 static void virtio_gpu_update_dumb_bo(struct virtio_gpu_device *vgdev,
 110                                       struct drm_plane_state *state,
 111                                       struct drm_rect *rect)
 112 {
 113         struct virtio_gpu_object *bo =
 114                 gem_to_virtio_gpu_obj(state->fb->obj[0]);
 115         struct virtio_gpu_object_array *objs;
 116         uint32_t w = rect->x2 - rect->x1;
 117         uint32_t h = rect->y2 - rect->y1;
 118         uint32_t x = rect->x1;
 119         uint32_t y = rect->y1;
 120         uint32_t off = x * state->fb->format->cpp[0] +
 121                 y * state->fb->pitches[0];
 122
 123         objs = virtio_gpu_array_alloc(1);
 124         if (!objs)
 125                 return;
 126         virtio_gpu_array_add_obj(objs, &bo->base.base);
 127
 128         virtio_gpu_cmd_transfer_to_host_2d(vgdev, off, w, h, x, y,
 129                                            objs, NULL);
 130 }
 131
 132 static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 133                                             struct drm_atomic_state *state)
 134 {
 135         struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
 136                                                                            plane);
 137         struct drm_device *dev = plane->dev;
 138         struct virtio_gpu_device *vgdev = dev->dev_private;
 139         struct virtio_gpu_output *output = NULL;
 140         struct virtio_gpu_object *bo;
 141         struct drm_rect rect;
 142
 143         if (plane->state->crtc)
 144                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 145         if (old_state->crtc)
 146                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 147         if (WARN_ON(!output))
 148                 return;
 149
 150         if (!plane->state->fb || !output->crtc.state->active) {
 151                 DRM_DEBUG("nofb\n");
 152                 virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 153                                            plane->state->src_w >> 16,
 154                                            plane->state->src_h >> 16,
 155                                            0, 0);
 156                 virtio_gpu_notify(vgdev);
 157                 return;
 158         }
 159
 160         if (!drm_atomic_helper_damage_merged(old_state, plane->state, &rect))
 161                 return;
 162
 163         bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
 164         if (bo->dumb)
 165                 virtio_gpu_update_dumb_bo(vgdev, plane->state, &rect);
 166
 167         if (plane->state->fb != old_state->fb ||
 168             plane->state->src_w != old_state->src_w ||
 169             plane->state->src_h != old_state->src_h ||
 170             plane->state->src_x != old_state->src_x ||
 171             plane->state->src_y != old_state->src_y ||
 172             output->needs_modeset) {
 173                 output->needs_modeset = false;
 174                 DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
 175                           bo->hw_res_handle,
 176                           plane->state->crtc_w, plane->state->crtc_h,
 177                           plane->state->crtc_x, plane->state->crtc_y,
 178                           plane->state->src_w >> 16,
 179                           plane->state->src_h >> 16,
 180                           plane->state->src_x >> 16,
 181                           plane->state->src_y >> 16);
 182
 183                 if (bo->host3d_blob || bo->guest_blob) {
 184                         virtio_gpu_cmd_set_scanout_blob
 185                                                 (vgdev, output->index, bo,
 186                                                  plane->state->fb,
 187                                                  plane->state->src_w >> 16,
 188                                                  plane->state->src_h >> 16,
 189                                                  plane->state->src_x >> 16,
 190                                                  plane->state->src_y >> 16);
 191                 } else {
 192                         virtio_gpu_cmd_set_scanout(vgdev, output->index,
 193                                                    bo->hw_res_handle,
 194                                                    plane->state->src_w >> 16,
 195                                                    plane->state->src_h >> 16,
 196                                                    plane->state->src_x >> 16,
 197                                                    plane->state->src_y >> 16);
 198                 }
 199         }
 200
 201         virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle,
 202                                       rect.x1,
 203                                       rect.y1,
 204                                       rect.x2 - rect.x1,
 205                                       rect.y2 - rect.y1);
 206         virtio_gpu_notify(vgdev);
 207 }
 208
 209 static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,
 210                                         struct drm_plane_state *new_state)
 211 {
 212         struct drm_device *dev = plane->dev;
 213         struct virtio_gpu_device *vgdev = dev->dev_private;
 214         struct virtio_gpu_framebuffer *vgfb;
 215         struct virtio_gpu_object *bo;
 216
 217         if (!new_state->fb)
 218                 return 0;
 219
 220         vgfb = to_virtio_gpu_framebuffer(new_state->fb);
 221         bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 222         if (bo && bo->dumb && (plane->state->fb != new_state->fb)) {
 223                 vgfb->fence = virtio_gpu_fence_alloc(vgdev);
 224                 if (!vgfb->fence)
 225                         return -ENOMEM;
 226         }
 227
 228         return 0;
 229 }
 230
 231 static void virtio_gpu_cursor_cleanup_fb(struct drm_plane *plane,
 232                                          struct drm_plane_state *old_state)
 233 {
 234         struct virtio_gpu_framebuffer *vgfb;
 235
 236         if (!plane->state->fb)
 237                 return;
 238
 239         vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 240         if (vgfb->fence) {
 241                 dma_fence_put(&vgfb->fence->f);
 242                 vgfb->fence = NULL;
 243         }
 244 }
 245
 246 static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
 247                                            struct drm_atomic_state *state)
 248 {
 249         struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
 250                                                                            plane);
 251         struct drm_device *dev = plane->dev;
 252         struct virtio_gpu_device *vgdev = dev->dev_private;
 253         struct virtio_gpu_output *output = NULL;
 254         struct virtio_gpu_framebuffer *vgfb;
 255         struct virtio_gpu_object *bo = NULL;
 256         uint32_t handle;
 257
 258         if (plane->state->crtc)
 259                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 260         if (old_state->crtc)
 261                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 262         if (WARN_ON(!output))
 263                 return;
 264
 265         if (plane->state->fb) {
 266                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 267                 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 268                 handle = bo->hw_res_handle;
 269         } else {
 270                 handle = 0;
 271         }
 272
 273         if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
 274                 /* new cursor -- update & wait */
 275                 struct virtio_gpu_object_array *objs;
 276
 277                 objs = virtio_gpu_array_alloc(1);
 278                 if (!objs)
 279                         return;
 280                 virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]);
 281                 virtio_gpu_array_lock_resv(objs);
 282                 virtio_gpu_cmd_transfer_to_host_2d
 283                         (vgdev, 0,
 284                          plane->state->crtc_w,
 285                          plane->state->crtc_h,
 286                          0, 0, objs, vgfb->fence);
 287                 virtio_gpu_notify(vgdev);
 288                 dma_fence_wait(&vgfb->fence->f, true);
 289                 dma_fence_put(&vgfb->fence->f);
 290                 vgfb->fence = NULL;
 291         }
 292
 293         if (plane->state->fb != old_state->fb) {
 294                 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
 295                           plane->state->crtc_x,
 296                           plane->state->crtc_y,
 297                           plane->state->fb ? plane->state->fb->hot_x : 0,
 298                           plane->state->fb ? plane->state->fb->hot_y : 0);
 299                 output->cursor.hdr.type =
 300                         cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 301                 output->cursor.resource_id = cpu_to_le32(handle);
 302                 if (plane->state->fb) {
 303                         output->cursor.hot_x =
 304                                 cpu_to_le32(plane->state->fb->hot_x);
 305                         output->cursor.hot_y =
 306                                 cpu_to_le32(plane->state->fb->hot_y);
 307                 } else {
 308                         output->cursor.hot_x = cpu_to_le32(0);
 309                         output->cursor.hot_y = cpu_to_le32(0);
 310                 }
 311         } else {
 312                 DRM_DEBUG("move +%d+%d\n",
 313                           plane->state->crtc_x,
 314                           plane->state->crtc_y);
 315                 output->cursor.hdr.type =
 316                         cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 317         }
 318         output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
 319         output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
 320         virtio_gpu_cursor_ping(vgdev, output);
 321 }
 322
 323 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
 324         .atomic_check           = virtio_gpu_plane_atomic_check,
 325         .atomic_update          = virtio_gpu_primary_plane_update,
 326 };
 327
 328 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
 329         .prepare_fb             = virtio_gpu_cursor_prepare_fb,
 330         .cleanup_fb             = virtio_gpu_cursor_cleanup_fb,
 331         .atomic_check           = virtio_gpu_plane_atomic_check,
 332         .atomic_update          = virtio_gpu_cursor_plane_update,
 333 };
 334
 335 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 336                                         enum drm_plane_type type,
 337                                         int index)
 338 {
 339         struct drm_device *dev = vgdev->ddev;
 340         const struct drm_plane_helper_funcs *funcs;
 341         struct drm_plane *plane;
 342         const uint32_t *formats;
 343         int ret, nformats;
 344
 345         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 346         if (!plane)
 347                 return ERR_PTR(-ENOMEM);
 348
 349         if (type == DRM_PLANE_TYPE_CURSOR) {
 350                 formats = virtio_gpu_cursor_formats;
 351                 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
 352                 funcs = &virtio_gpu_cursor_helper_funcs;
 353         } else {
 354                 formats = virtio_gpu_formats;
 355                 nformats = ARRAY_SIZE(virtio_gpu_formats);
 356                 funcs = &virtio_gpu_primary_helper_funcs;
 357         }
 358         ret = drm_universal_plane_init(dev, plane, 1 << index,
 359                                        &virtio_gpu_plane_funcs,
 360                                        formats, nformats,
 361                                        NULL, type, NULL);
 362         if (ret)
 363                 goto err_plane_init;
 364
 365         drm_plane_helper_add(plane, funcs);
 366         return plane;
 367
 368 err_plane_init:
 369         kfree(plane);
 370         return ERR_PTR(ret);
 371 }