drivers/gpu/drm/virtio/virtgpu_display.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Authors:
   6  *    Dave Airlie
   7  *    Alon Levy
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "virtgpu_drv.h"
  29 #include <drm/drm_crtc_helper.h>
  30 #include <drm/drm_atomic_helper.h>
  31
  32 #define XRES_MIN   320
  33 #define YRES_MIN   200
  34
  35 #define XRES_DEF  1024
  36 #define YRES_DEF   768
  37
  38 #define XRES_MAX  8192
  39 #define YRES_MAX  8192
  40
  41 static void virtio_gpu_crtc_gamma_set(struct drm_crtc *crtc,
  42                                       u16 *red, u16 *green, u16 *blue,
  43                                       uint32_t start, uint32_t size)
  44 {
  45         /* TODO */
  46 }
  47
  48 static void
  49 virtio_gpu_hide_cursor(struct virtio_gpu_device *vgdev,
  50                        struct virtio_gpu_output *output)
  51 {
  52         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
  53         output->cursor.resource_id = 0;
  54         virtio_gpu_cursor_ping(vgdev, output);
  55 }
  56
  57 static int virtio_gpu_crtc_cursor_set(struct drm_crtc *crtc,
  58                                       struct drm_file *file_priv,
  59                                       uint32_t handle,
  60                                       uint32_t width,
  61                                       uint32_t height,
  62                                       int32_t hot_x, int32_t hot_y)
  63 {
  64         struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
  65         struct virtio_gpu_output *output =
  66                 container_of(crtc, struct virtio_gpu_output, crtc);
  67         struct drm_gem_object *gobj = NULL;
  68         struct virtio_gpu_object *qobj = NULL;
  69         struct virtio_gpu_fence *fence = NULL;
  70         int ret = 0;
  71
  72         if (handle == 0) {
  73                 virtio_gpu_hide_cursor(vgdev, output);
  74                 return 0;
  75         }
  76
  77         /* lookup the cursor */
  78         gobj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
  79         if (gobj == NULL)
  80                 return -ENOENT;
  81
  82         qobj = gem_to_virtio_gpu_obj(gobj);
  83
  84         if (!qobj->hw_res_handle) {
  85                 ret = -EINVAL;
  86                 goto out;
  87         }
  88
  89         virtio_gpu_cmd_transfer_to_host_2d(vgdev, qobj->hw_res_handle, 0,
  90                                            cpu_to_le32(64),
  91                                            cpu_to_le32(64),
  92                                            0, 0, &fence);
  93
  94         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
  95         output->cursor.resource_id = cpu_to_le32(qobj->hw_res_handle);
  96         output->cursor.hot_x = cpu_to_le32(hot_x);
  97         output->cursor.hot_y = cpu_to_le32(hot_y);
  98         virtio_gpu_cursor_ping(vgdev, output);
  99         ret = 0;
 100
 101 out:
 102         drm_gem_object_unreference_unlocked(gobj);
 103         return ret;
 104 }
 105
 106 static int virtio_gpu_crtc_cursor_move(struct drm_crtc *crtc,
 107                                     int x, int y)
 108 {
 109         struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
 110         struct virtio_gpu_output *output =
 111                 container_of(crtc, struct virtio_gpu_output, crtc);
 112
 113         output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 114         output->cursor.pos.x = cpu_to_le32(x);
 115         output->cursor.pos.y = cpu_to_le32(y);
 116         virtio_gpu_cursor_ping(vgdev, output);
 117         return 0;
 118 }
 119
 120 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
 121         .cursor_set2            = virtio_gpu_crtc_cursor_set,
 122         .cursor_move            = virtio_gpu_crtc_cursor_move,
 123         .gamma_set              = virtio_gpu_crtc_gamma_set,
 124         .set_config             = drm_atomic_helper_set_config,
 125         .destroy                = drm_crtc_cleanup,
 126
 127 #if 0 /* not (yet) working without vblank support according to docs */
 128         .page_flip              = drm_atomic_helper_page_flip,
 129 #endif
 130         .reset                  = drm_atomic_helper_crtc_reset,
 131         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 132         .atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
 133 };
 134
 135 static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 136 {
 137         struct virtio_gpu_framebuffer *virtio_gpu_fb
 138                 = to_virtio_gpu_framebuffer(fb);
 139
 140         if (virtio_gpu_fb->obj)
 141                 drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
 142         drm_framebuffer_cleanup(fb);
 143         kfree(virtio_gpu_fb);
 144 }
 145
 146 static int
 147 virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
 148                                      struct drm_file *file_priv,
 149                                      unsigned flags, unsigned color,
 150                                      struct drm_clip_rect *clips,
 151                                      unsigned num_clips)
 152 {
 153         struct virtio_gpu_framebuffer *virtio_gpu_fb
 154                 = to_virtio_gpu_framebuffer(fb);
 155
 156         return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
 157 }
 158
 159 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
 160         .destroy = virtio_gpu_user_framebuffer_destroy,
 161         .dirty = virtio_gpu_framebuffer_surface_dirty,
 162 };
 163
 164 int
 165 virtio_gpu_framebuffer_init(struct drm_device *dev,
 166                             struct virtio_gpu_framebuffer *vgfb,
 167                             struct drm_mode_fb_cmd2 *mode_cmd,
 168                             struct drm_gem_object *obj)
 169 {
 170         int ret;
 171         struct virtio_gpu_object *bo;
 172         vgfb->obj = obj;
 173
 174         bo = gem_to_virtio_gpu_obj(obj);
 175
 176         ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
 177         if (ret) {
 178                 vgfb->obj = NULL;
 179                 return ret;
 180         }
 181         drm_helper_mode_fill_fb_struct(&vgfb->base, mode_cmd);
 182
 183         spin_lock_init(&vgfb->dirty_lock);
 184         vgfb->x1 = vgfb->y1 = INT_MAX;
 185         vgfb->x2 = vgfb->y2 = 0;
 186         return 0;
 187 }
 188
 189 static bool virtio_gpu_crtc_mode_fixup(struct drm_crtc *crtc,
 190                                        const struct drm_display_mode *mode,
 191                                        struct drm_display_mode *adjusted_mode)
 192 {
 193         return true;
 194 }
 195
 196 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 197 {
 198         struct drm_device *dev = crtc->dev;
 199         struct virtio_gpu_device *vgdev = dev->dev_private;
 200         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 201
 202         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 203                                    crtc->mode.hdisplay,
 204                                    crtc->mode.vdisplay, 0, 0);
 205 }
 206
 207 static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
 208 {
 209 }
 210
 211 static void virtio_gpu_crtc_disable(struct drm_crtc *crtc)
 212 {
 213         struct drm_device *dev = crtc->dev;
 214         struct virtio_gpu_device *vgdev = dev->dev_private;
 215         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 216
 217         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
 218 }
 219
 220 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
 221                                         struct drm_crtc_state *state)
 222 {
 223         return 0;
 224 }
 225
 226 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
 227         .enable        = virtio_gpu_crtc_enable,
 228         .disable       = virtio_gpu_crtc_disable,
 229         .mode_fixup    = virtio_gpu_crtc_mode_fixup,
 230         .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
 231         .atomic_check  = virtio_gpu_crtc_atomic_check,
 232 };
 233
 234 static bool virtio_gpu_enc_mode_fixup(struct drm_encoder *encoder,
 235                                       const struct drm_display_mode *mode,
 236                                       struct drm_display_mode *adjusted_mode)
 237 {
 238         return true;
 239 }
 240
 241 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
 242                                     struct drm_display_mode *mode,
 243                                     struct drm_display_mode *adjusted_mode)
 244 {
 245 }
 246
 247 static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
 248 {
 249 }
 250
 251 static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
 252 {
 253 }
 254
 255 static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
 256 {
 257         struct virtio_gpu_output *output =
 258                 drm_connector_to_virtio_gpu_output(connector);
 259         struct drm_display_mode *mode = NULL;
 260         int count, width, height;
 261
 262         width  = le32_to_cpu(output->info.r.width);
 263         height = le32_to_cpu(output->info.r.height);
 264         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
 265
 266         if (width == 0 || height == 0) {
 267                 width = XRES_DEF;
 268                 height = YRES_DEF;
 269                 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
 270         } else {
 271                 DRM_DEBUG("add mode: %dx%d\n", width, height);
 272                 mode = drm_cvt_mode(connector->dev, width, height, 60,
 273                                     false, false, false);
 274                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 275                 drm_mode_probed_add(connector, mode);
 276                 count++;
 277         }
 278
 279         return count;
 280 }
 281
 282 static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
 283                                       struct drm_display_mode *mode)
 284 {
 285         struct virtio_gpu_output *output =
 286                 drm_connector_to_virtio_gpu_output(connector);
 287         int width, height;
 288
 289         width  = le32_to_cpu(output->info.r.width);
 290         height = le32_to_cpu(output->info.r.height);
 291
 292         if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
 293                 return MODE_OK;
 294         if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
 295                 return MODE_OK;
 296         if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&
 297             mode->vdisplay <= height && mode->vdisplay >= height - 16)
 298                 return MODE_OK;
 299
 300         DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
 301         return MODE_BAD;
 302 }
 303
 304 static struct drm_encoder*
 305 virtio_gpu_best_encoder(struct drm_connector *connector)
 306 {
 307         struct virtio_gpu_output *virtio_gpu_output =
 308                 drm_connector_to_virtio_gpu_output(connector);
 309
 310         return &virtio_gpu_output->enc;
 311 }
 312
 313 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
 314         .mode_fixup = virtio_gpu_enc_mode_fixup,
 315         .mode_set   = virtio_gpu_enc_mode_set,
 316         .enable     = virtio_gpu_enc_enable,
 317         .disable    = virtio_gpu_enc_disable,
 318 };
 319
 320 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
 321         .get_modes    = virtio_gpu_conn_get_modes,
 322         .mode_valid   = virtio_gpu_conn_mode_valid,
 323         .best_encoder = virtio_gpu_best_encoder,
 324 };
 325
 326 static void virtio_gpu_conn_save(struct drm_connector *connector)
 327 {
 328         DRM_DEBUG("\n");
 329 }
 330
 331 static void virtio_gpu_conn_restore(struct drm_connector *connector)
 332 {
 333         DRM_DEBUG("\n");
 334 }
 335
 336 static enum drm_connector_status virtio_gpu_conn_detect(
 337                         struct drm_connector *connector,
 338                         bool force)
 339 {
 340         struct virtio_gpu_output *output =
 341                 drm_connector_to_virtio_gpu_output(connector);
 342
 343         if (output->info.enabled)
 344                 return connector_status_connected;
 345         else
 346                 return connector_status_disconnected;
 347 }
 348
 349 static void virtio_gpu_conn_destroy(struct drm_connector *connector)
 350 {
 351         struct virtio_gpu_output *virtio_gpu_output =
 352                 drm_connector_to_virtio_gpu_output(connector);
 353
 354         drm_connector_unregister(connector);
 355         drm_connector_cleanup(connector);
 356         kfree(virtio_gpu_output);
 357 }
 358
 359 static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
 360         .dpms = drm_atomic_helper_connector_dpms,
 361         .save = virtio_gpu_conn_save,
 362         .restore = virtio_gpu_conn_restore,
 363         .detect = virtio_gpu_conn_detect,
 364         .fill_modes = drm_helper_probe_single_connector_modes,
 365         .destroy = virtio_gpu_conn_destroy,
 366         .reset = drm_atomic_helper_connector_reset,
 367         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 368         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 369 };
 370
 371 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
 372         .destroy = drm_encoder_cleanup,
 373 };
 374
 375 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
 376 {
 377         struct drm_device *dev = vgdev->ddev;
 378         struct virtio_gpu_output *output = vgdev->outputs + index;
 379         struct drm_connector *connector = &output->conn;
 380         struct drm_encoder *encoder = &output->enc;
 381         struct drm_crtc *crtc = &output->crtc;
 382         struct drm_plane *plane;
 383
 384         output->index = index;
 385         if (index == 0) {
 386                 output->info.enabled = cpu_to_le32(true);
 387                 output->info.r.width = cpu_to_le32(XRES_DEF);
 388                 output->info.r.height = cpu_to_le32(YRES_DEF);
 389         }
 390
 391         plane = virtio_gpu_plane_init(vgdev, index);
 392         if (IS_ERR(plane))
 393                 return PTR_ERR(plane);
 394         drm_crtc_init_with_planes(dev, crtc, plane, NULL,
 395                                   &virtio_gpu_crtc_funcs);
 396         drm_mode_crtc_set_gamma_size(crtc, 256);
 397         drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
 398         plane->crtc = crtc;
 399
 400         drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
 401                            DRM_MODE_CONNECTOR_VIRTUAL);
 402         drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
 403
 404         drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
 405                          DRM_MODE_ENCODER_VIRTUAL);
 406         drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
 407         encoder->possible_crtcs = 1 << index;
 408
 409         drm_mode_connector_attach_encoder(connector, encoder);
 410         drm_connector_register(connector);
 411         return 0;
 412 }
 413
 414 static struct drm_framebuffer *
 415 virtio_gpu_user_framebuffer_create(struct drm_device *dev,
 416                                    struct drm_file *file_priv,
 417                                    struct drm_mode_fb_cmd2 *mode_cmd)
 418 {
 419         struct drm_gem_object *obj = NULL;
 420         struct virtio_gpu_framebuffer *virtio_gpu_fb;
 421         int ret;
 422
 423         /* lookup object associated with res handle */
 424         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 425         if (!obj)
 426                 return ERR_PTR(-EINVAL);
 427
 428         virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
 429         if (virtio_gpu_fb == NULL)
 430                 return ERR_PTR(-ENOMEM);
 431
 432         ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
 433         if (ret) {
 434                 kfree(virtio_gpu_fb);
 435                 if (obj)
 436                         drm_gem_object_unreference_unlocked(obj);
 437                 return NULL;
 438         }
 439
 440         return &virtio_gpu_fb->base;
 441 }
 442
 443 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
 444         .fb_create = virtio_gpu_user_framebuffer_create,
 445         .atomic_check = drm_atomic_helper_check,
 446         .atomic_commit = drm_atomic_helper_commit,
 447 };
 448
 449 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 450 {
 451         int i;
 452
 453         drm_mode_config_init(vgdev->ddev);
 454         vgdev->ddev->mode_config.funcs = (void *)&virtio_gpu_mode_funcs;
 455
 456         /* modes will be validated against the framebuffer size */
 457         vgdev->ddev->mode_config.min_width = XRES_MIN;
 458         vgdev->ddev->mode_config.min_height = YRES_MIN;
 459         vgdev->ddev->mode_config.max_width = XRES_MAX;
 460         vgdev->ddev->mode_config.max_height = YRES_MAX;
 461
 462         for (i = 0 ; i < vgdev->num_scanouts; ++i)
 463                 vgdev_output_init(vgdev, i);
 464
 465         drm_mode_config_reset(vgdev->ddev);
 466         return 0;
 467 }
 468
 469 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
 470 {
 471         virtio_gpu_fbdev_fini(vgdev);
 472         drm_mode_config_cleanup(vgdev->ddev);
 473 }