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    32
  33 #define YRES_MIN    32
  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 const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
  42         .set_config             = drm_atomic_helper_set_config,
  43         .destroy                = drm_crtc_cleanup,
  44
  45         .page_flip              = drm_atomic_helper_page_flip,
  46         .reset                  = drm_atomic_helper_crtc_reset,
  47         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
  48         .atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
  49 };
  50
  51 static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
  52 {
  53         struct virtio_gpu_framebuffer *virtio_gpu_fb
  54                 = to_virtio_gpu_framebuffer(fb);
  55
  56         drm_gem_object_put_unlocked(virtio_gpu_fb->obj);
  57         drm_framebuffer_cleanup(fb);
  58         kfree(virtio_gpu_fb);
  59 }
  60
  61 static int
  62 virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
  63                                      struct drm_file *file_priv,
  64                                      unsigned flags, unsigned color,
  65                                      struct drm_clip_rect *clips,
  66                                      unsigned num_clips)
  67 {
  68         struct virtio_gpu_framebuffer *virtio_gpu_fb
  69                 = to_virtio_gpu_framebuffer(fb);
  70
  71         return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
  72 }
  73
  74 static int
  75 virtio_gpu_framebuffer_create_handle(struct drm_framebuffer *fb,
  76                                      struct drm_file *file_priv,
  77                                      unsigned int *handle)
  78 {
  79         struct virtio_gpu_framebuffer *virtio_gpu_fb =
  80                 to_virtio_gpu_framebuffer(fb);
  81
  82         return drm_gem_handle_create(file_priv, virtio_gpu_fb->obj, handle);
  83 }
  84
  85 static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
  86         .create_handle = virtio_gpu_framebuffer_create_handle,
  87         .destroy = virtio_gpu_user_framebuffer_destroy,
  88         .dirty = virtio_gpu_framebuffer_surface_dirty,
  89 };
  90
  91 int
  92 virtio_gpu_framebuffer_init(struct drm_device *dev,
  93                             struct virtio_gpu_framebuffer *vgfb,
  94                             const struct drm_mode_fb_cmd2 *mode_cmd,
  95                             struct drm_gem_object *obj)
  96 {
  97         int ret;
  98         struct virtio_gpu_object *bo;
  99         vgfb->obj = obj;
 100
 101         bo = gem_to_virtio_gpu_obj(obj);
 102
 103         drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd);
 104
 105         ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
 106         if (ret) {
 107                 vgfb->obj = NULL;
 108                 return ret;
 109         }
 110
 111         spin_lock_init(&vgfb->dirty_lock);
 112         vgfb->x1 = vgfb->y1 = INT_MAX;
 113         vgfb->x2 = vgfb->y2 = 0;
 114         return 0;
 115 }
 116
 117 static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 118 {
 119         struct drm_device *dev = crtc->dev;
 120         struct virtio_gpu_device *vgdev = dev->dev_private;
 121         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 122
 123         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 124                                    crtc->mode.hdisplay,
 125                                    crtc->mode.vdisplay, 0, 0);
 126 }
 127
 128 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
 129                                           struct drm_crtc_state *old_state)
 130 {
 131 }
 132
 133 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
 134                                            struct drm_crtc_state *old_state)
 135 {
 136         struct drm_device *dev = crtc->dev;
 137         struct virtio_gpu_device *vgdev = dev->dev_private;
 138         struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
 139
 140         virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
 141 }
 142
 143 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
 144                                         struct drm_crtc_state *state)
 145 {
 146         return 0;
 147 }
 148
 149 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
 150                                          struct drm_crtc_state *old_state)
 151 {
 152         unsigned long flags;
 153
 154         spin_lock_irqsave(&crtc->dev->event_lock, flags);
 155         if (crtc->state->event)
 156                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
 157         crtc->state->event = NULL;
 158         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 159 }
 160
 161 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
 162         .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
 163         .atomic_check  = virtio_gpu_crtc_atomic_check,
 164         .atomic_flush  = virtio_gpu_crtc_atomic_flush,
 165         .atomic_enable = virtio_gpu_crtc_atomic_enable,
 166         .atomic_disable = virtio_gpu_crtc_atomic_disable,
 167 };
 168
 169 static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
 170                                     struct drm_display_mode *mode,
 171                                     struct drm_display_mode *adjusted_mode)
 172 {
 173 }
 174
 175 static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
 176 {
 177 }
 178
 179 static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
 180 {
 181 }
 182
 183 static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
 184 {
 185         struct virtio_gpu_output *output =
 186                 drm_connector_to_virtio_gpu_output(connector);
 187         struct drm_display_mode *mode = NULL;
 188         int count, width, height;
 189
 190         width  = le32_to_cpu(output->info.r.width);
 191         height = le32_to_cpu(output->info.r.height);
 192         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
 193
 194         if (width == 0 || height == 0) {
 195                 width = XRES_DEF;
 196                 height = YRES_DEF;
 197                 drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
 198         } else {
 199                 DRM_DEBUG("add mode: %dx%d\n", width, height);
 200                 mode = drm_cvt_mode(connector->dev, width, height, 60,
 201                                     false, false, false);
 202                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 203                 drm_mode_probed_add(connector, mode);
 204                 count++;
 205         }
 206
 207         return count;
 208 }
 209
 210 static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
 211                                       struct drm_display_mode *mode)
 212 {
 213         struct virtio_gpu_output *output =
 214                 drm_connector_to_virtio_gpu_output(connector);
 215         int width, height;
 216
 217         width  = le32_to_cpu(output->info.r.width);
 218         height = le32_to_cpu(output->info.r.height);
 219
 220         if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
 221                 return MODE_OK;
 222         if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
 223                 return MODE_OK;
 224         if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&
 225             mode->vdisplay <= height && mode->vdisplay >= height - 16)
 226                 return MODE_OK;
 227
 228         DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
 229         return MODE_BAD;
 230 }
 231
 232 static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
 233         .mode_set   = virtio_gpu_enc_mode_set,
 234         .enable     = virtio_gpu_enc_enable,
 235         .disable    = virtio_gpu_enc_disable,
 236 };
 237
 238 static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
 239         .get_modes    = virtio_gpu_conn_get_modes,
 240         .mode_valid   = virtio_gpu_conn_mode_valid,
 241 };
 242
 243 static enum drm_connector_status virtio_gpu_conn_detect(
 244                         struct drm_connector *connector,
 245                         bool force)
 246 {
 247         struct virtio_gpu_output *output =
 248                 drm_connector_to_virtio_gpu_output(connector);
 249
 250         if (output->info.enabled)
 251                 return connector_status_connected;
 252         else
 253                 return connector_status_disconnected;
 254 }
 255
 256 static void virtio_gpu_conn_destroy(struct drm_connector *connector)
 257 {
 258         struct virtio_gpu_output *virtio_gpu_output =
 259                 drm_connector_to_virtio_gpu_output(connector);
 260
 261         drm_connector_unregister(connector);
 262         drm_connector_cleanup(connector);
 263         kfree(virtio_gpu_output);
 264 }
 265
 266 static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
 267         .detect = virtio_gpu_conn_detect,
 268         .fill_modes = drm_helper_probe_single_connector_modes,
 269         .destroy = virtio_gpu_conn_destroy,
 270         .reset = drm_atomic_helper_connector_reset,
 271         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 272         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 273 };
 274
 275 static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
 276         .destroy = drm_encoder_cleanup,
 277 };
 278
 279 static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
 280 {
 281         struct drm_device *dev = vgdev->ddev;
 282         struct virtio_gpu_output *output = vgdev->outputs + index;
 283         struct drm_connector *connector = &output->conn;
 284         struct drm_encoder *encoder = &output->enc;
 285         struct drm_crtc *crtc = &output->crtc;
 286         struct drm_plane *primary, *cursor;
 287
 288         output->index = index;
 289         if (index == 0) {
 290                 output->info.enabled = cpu_to_le32(true);
 291                 output->info.r.width = cpu_to_le32(XRES_DEF);
 292                 output->info.r.height = cpu_to_le32(YRES_DEF);
 293         }
 294
 295         primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
 296         if (IS_ERR(primary))
 297                 return PTR_ERR(primary);
 298         cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
 299         if (IS_ERR(cursor))
 300                 return PTR_ERR(cursor);
 301         drm_crtc_init_with_planes(dev, crtc, primary, cursor,
 302                                   &virtio_gpu_crtc_funcs, NULL);
 303         drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
 304         primary->crtc = crtc;
 305         cursor->crtc = crtc;
 306
 307         drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
 308                            DRM_MODE_CONNECTOR_VIRTUAL);
 309         drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);
 310
 311         drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
 312                          DRM_MODE_ENCODER_VIRTUAL, NULL);
 313         drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
 314         encoder->possible_crtcs = 1 << index;
 315
 316         drm_mode_connector_attach_encoder(connector, encoder);
 317         drm_connector_register(connector);
 318         return 0;
 319 }
 320
 321 static struct drm_framebuffer *
 322 virtio_gpu_user_framebuffer_create(struct drm_device *dev,
 323                                    struct drm_file *file_priv,
 324                                    const struct drm_mode_fb_cmd2 *mode_cmd)
 325 {
 326         struct drm_gem_object *obj = NULL;
 327         struct virtio_gpu_framebuffer *virtio_gpu_fb;
 328         int ret;
 329
 330         /* lookup object associated with res handle */
 331         obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);
 332         if (!obj)
 333                 return ERR_PTR(-EINVAL);
 334
 335         virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
 336         if (virtio_gpu_fb == NULL)
 337                 return ERR_PTR(-ENOMEM);
 338
 339         ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
 340         if (ret) {
 341                 kfree(virtio_gpu_fb);
 342                 drm_gem_object_put_unlocked(obj);
 343                 return NULL;
 344         }
 345
 346         return &virtio_gpu_fb->base;
 347 }
 348
 349 static void vgdev_atomic_commit_tail(struct drm_atomic_state *state)
 350 {
 351         struct drm_device *dev = state->dev;
 352
 353         drm_atomic_helper_commit_modeset_disables(dev, state);
 354         drm_atomic_helper_commit_modeset_enables(dev, state);
 355         drm_atomic_helper_commit_planes(dev, state, 0);
 356
 357         drm_atomic_helper_commit_hw_done(state);
 358
 359         drm_atomic_helper_wait_for_vblanks(dev, state);
 360         drm_atomic_helper_cleanup_planes(dev, state);
 361 }
 362
 363 static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {
 364         .atomic_commit_tail = vgdev_atomic_commit_tail,
 365 };
 366
 367 static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
 368         .fb_create = virtio_gpu_user_framebuffer_create,
 369         .atomic_check = drm_atomic_helper_check,
 370         .atomic_commit = drm_atomic_helper_commit,
 371 };
 372
 373 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 374 {
 375         int i;
 376
 377         drm_mode_config_init(vgdev->ddev);
 378         vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;
 379         vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers;
 380
 381         /* modes will be validated against the framebuffer size */
 382         vgdev->ddev->mode_config.min_width = XRES_MIN;
 383         vgdev->ddev->mode_config.min_height = YRES_MIN;
 384         vgdev->ddev->mode_config.max_width = XRES_MAX;
 385         vgdev->ddev->mode_config.max_height = YRES_MAX;
 386
 387         for (i = 0 ; i < vgdev->num_scanouts; ++i)
 388                 vgdev_output_init(vgdev, i);
 389
 390         drm_mode_config_reset(vgdev->ddev);
 391         return 0;
 392 }
 393
 394 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
 395 {
 396         virtio_gpu_fbdev_fini(vgdev);
 397         drm_mode_config_cleanup(vgdev->ddev);
 398 }