drivers/gpu/drm/vboxvideo/vbox_mode.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright (C) 2013-2017 Oracle Corporation
   4  * This file is based on ast_mode.c
   5  * Copyright 2012 Red Hat Inc.
   6  * Parts based on xf86-video-ast
   7  * Copyright (c) 2005 ASPEED Technology Inc.
   8  * Authors: Dave Airlie <airlied@redhat.com>
   9  *          Michael Thayer <michael.thayer@oracle.com,
  10  *          Hans de Goede <hdegoede@redhat.com>
  11  */
  12 #include <linux/export.h>
  13
  14 #include <drm/drm_atomic.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_fb_helper.h>
  17 #include <drm/drm_fourcc.h>
  18 #include <drm/drm_plane_helper.h>
  19 #include <drm/drm_probe_helper.h>
  20 #include <drm/drm_vblank.h>
  21
  22 #include "hgsmi_channels.h"
  23 #include "vbox_drv.h"
  24 #include "vboxvideo.h"
  25
  26 /*
  27  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
  28  * mode set and tell the host we support advanced graphics functions.
  29  */
  30 static void vbox_do_modeset(struct drm_crtc *crtc)
  31 {
  32         struct drm_framebuffer *fb = crtc->primary->state->fb;
  33         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  34         struct vbox_private *vbox;
  35         int width, height, bpp, pitch;
  36         u16 flags;
  37         s32 x_offset, y_offset;
  38
  39         vbox = crtc->dev->dev_private;
  40         width = vbox_crtc->width ? vbox_crtc->width : 640;
  41         height = vbox_crtc->height ? vbox_crtc->height : 480;
  42         bpp = fb ? fb->format->cpp[0] * 8 : 32;
  43         pitch = fb ? fb->pitches[0] : width * bpp / 8;
  44         x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
  45         y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
  46
  47         /*
  48          * This is the old way of setting graphics modes.  It assumed one screen
  49          * and a frame-buffer at the start of video RAM.  On older versions of
  50          * VirtualBox, certain parts of the code still assume that the first
  51          * screen is programmed this way, so try to fake it.
  52          */
  53         if (vbox_crtc->crtc_id == 0 && fb &&
  54             vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
  55             vbox_crtc->fb_offset % (bpp / 8) == 0) {
  56                 vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
  57                 vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
  58                 vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
  59                 vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
  60                 vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
  61                 vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
  62                         vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
  63                 vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
  64                                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
  65         }
  66
  67         flags = VBVA_SCREEN_F_ACTIVE;
  68         flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
  69         flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
  70         hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
  71                                    x_offset, y_offset,
  72                                    vbox_crtc->x * bpp / 8 +
  73                                                         vbox_crtc->y * pitch,
  74                                    pitch, width, height, bpp, flags);
  75 }
  76
  77 static int vbox_set_view(struct drm_crtc *crtc)
  78 {
  79         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  80         struct vbox_private *vbox = crtc->dev->dev_private;
  81         struct vbva_infoview *p;
  82
  83         /*
  84          * Tell the host about the view.  This design originally targeted the
  85          * Windows XP driver architecture and assumed that each screen would
  86          * have a dedicated frame buffer with the command buffer following it,
  87          * the whole being a "view".  The host works out which screen a command
  88          * buffer belongs to by checking whether it is in the first view, then
  89          * whether it is in the second and so on.  The first match wins.  We
  90          * cheat around this by making the first view be the managed memory
  91          * plus the first command buffer, the second the same plus the second
  92          * buffer and so on.
  93          */
  94         p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
  95                                HGSMI_CH_VBVA, VBVA_INFO_VIEW);
  96         if (!p)
  97                 return -ENOMEM;
  98
  99         p->view_index = vbox_crtc->crtc_id;
 100         p->view_offset = vbox_crtc->fb_offset;
 101         p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
 102                        vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
 103         p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
 104
 105         hgsmi_buffer_submit(vbox->guest_pool, p);
 106         hgsmi_buffer_free(vbox->guest_pool, p);
 107
 108         return 0;
 109 }
 110
 111 /*
 112  * Try to map the layout of virtual screens to the range of the input device.
 113  * Return true if we need to re-set the crtc modes due to screen offset
 114  * changes.
 115  */
 116 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 117 {
 118         struct drm_crtc *crtci;
 119         struct drm_connector *connectori;
 120         struct drm_framebuffer *fb, *fb1 = NULL;
 121         bool single_framebuffer = true;
 122         bool old_single_framebuffer = vbox->single_framebuffer;
 123         u16 width = 0, height = 0;
 124
 125         /*
 126          * Are we using an X.Org-style single large frame-buffer for all crtcs?
 127          * If so then screen layout can be deduced from the crtc offsets.
 128          * Same fall-back if this is the fbdev frame-buffer.
 129          */
 130         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 131                 fb = crtci->primary->state->fb;
 132                 if (!fb)
 133                         continue;
 134
 135                 if (!fb1) {
 136                         fb1 = fb;
 137                         if (fb1 == vbox->ddev.fb_helper->fb)
 138                                 break;
 139                 } else if (fb != fb1) {
 140                         single_framebuffer = false;
 141                 }
 142         }
 143         if (!fb1)
 144                 return false;
 145
 146         if (single_framebuffer) {
 147                 vbox->single_framebuffer = true;
 148                 vbox->input_mapping_width = fb1->width;
 149                 vbox->input_mapping_height = fb1->height;
 150                 return old_single_framebuffer != vbox->single_framebuffer;
 151         }
 152         /* Otherwise calculate the total span of all screens. */
 153         list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
 154                             head) {
 155                 struct vbox_connector *vbox_connector =
 156                     to_vbox_connector(connectori);
 157                 struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
 158
 159                 width = max_t(u16, width, vbox_crtc->x_hint +
 160                                           vbox_connector->mode_hint.width);
 161                 height = max_t(u16, height, vbox_crtc->y_hint +
 162                                             vbox_connector->mode_hint.height);
 163         }
 164
 165         vbox->single_framebuffer = false;
 166         vbox->input_mapping_width = width;
 167         vbox->input_mapping_height = height;
 168
 169         return old_single_framebuffer != vbox->single_framebuffer;
 170 }
 171
 172 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 173                                         struct drm_framebuffer *fb,
 174                                         int x, int y)
 175 {
 176         struct drm_gem_vram_object *gbo =
 177                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 178         struct vbox_private *vbox = crtc->dev->dev_private;
 179         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
 180         bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
 181
 182         mutex_lock(&vbox->hw_mutex);
 183
 184         if (crtc->state->enable) {
 185                 vbox_crtc->width = crtc->state->mode.hdisplay;
 186                 vbox_crtc->height = crtc->state->mode.vdisplay;
 187         }
 188
 189         vbox_crtc->x = x;
 190         vbox_crtc->y = y;
 191         vbox_crtc->fb_offset = drm_gem_vram_offset(gbo);
 192
 193         /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
 194         if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
 195                 struct drm_crtc *crtci;
 196
 197                 list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
 198                                     head) {
 199                         if (crtci == crtc)
 200                                 continue;
 201                         vbox_do_modeset(crtci);
 202                 }
 203         }
 204
 205         vbox_set_view(crtc);
 206         vbox_do_modeset(crtc);
 207
 208         if (needs_modeset)
 209                 hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
 210                                            vbox->input_mapping_width,
 211                                            vbox->input_mapping_height);
 212
 213         mutex_unlock(&vbox->hw_mutex);
 214 }
 215
 216 static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
 217                                     struct drm_crtc_state *old_crtc_state)
 218 {
 219 }
 220
 221 static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
 222                                      struct drm_crtc_state *old_crtc_state)
 223 {
 224 }
 225
 226 static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
 227                                    struct drm_crtc_state *old_crtc_state)
 228 {
 229         struct drm_pending_vblank_event *event;
 230         unsigned long flags;
 231
 232         if (crtc->state && crtc->state->event) {
 233                 event = crtc->state->event;
 234                 crtc->state->event = NULL;
 235
 236                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 237                 drm_crtc_send_vblank_event(crtc, event);
 238                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 239         }
 240 }
 241
 242 static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
 243         .atomic_enable = vbox_crtc_atomic_enable,
 244         .atomic_disable = vbox_crtc_atomic_disable,
 245         .atomic_flush = vbox_crtc_atomic_flush,
 246 };
 247
 248 static void vbox_crtc_destroy(struct drm_crtc *crtc)
 249 {
 250         drm_crtc_cleanup(crtc);
 251         kfree(crtc);
 252 }
 253
 254 static const struct drm_crtc_funcs vbox_crtc_funcs = {
 255         .set_config = drm_atomic_helper_set_config,
 256         .page_flip = drm_atomic_helper_page_flip,
 257         /* .gamma_set = vbox_crtc_gamma_set, */
 258         .destroy = vbox_crtc_destroy,
 259         .reset = drm_atomic_helper_crtc_reset,
 260         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 261         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 262 };
 263
 264 static int vbox_primary_atomic_check(struct drm_plane *plane,
 265                                      struct drm_plane_state *new_state)
 266 {
 267         struct drm_crtc_state *crtc_state = NULL;
 268
 269         if (new_state->crtc) {
 270                 crtc_state = drm_atomic_get_existing_crtc_state(
 271                                             new_state->state, new_state->crtc);
 272                 if (WARN_ON(!crtc_state))
 273                         return -EINVAL;
 274         }
 275
 276         return drm_atomic_helper_check_plane_state(new_state, crtc_state,
 277                                                    DRM_PLANE_HELPER_NO_SCALING,
 278                                                    DRM_PLANE_HELPER_NO_SCALING,
 279                                                    false, true);
 280 }
 281
 282 static void vbox_primary_atomic_update(struct drm_plane *plane,
 283                                        struct drm_plane_state *old_state)
 284 {
 285         struct drm_crtc *crtc = plane->state->crtc;
 286         struct drm_framebuffer *fb = plane->state->fb;
 287
 288         vbox_crtc_set_base_and_mode(crtc, fb,
 289                                     plane->state->src_x >> 16,
 290                                     plane->state->src_y >> 16);
 291 }
 292
 293 static void vbox_primary_atomic_disable(struct drm_plane *plane,
 294                                         struct drm_plane_state *old_state)
 295 {
 296         struct drm_crtc *crtc = old_state->crtc;
 297
 298         /* vbox_do_modeset checks plane->state->fb and will disable if NULL */
 299         vbox_crtc_set_base_and_mode(crtc, old_state->fb,
 300                                     old_state->src_x >> 16,
 301                                     old_state->src_y >> 16);
 302 }
 303
 304 static int vbox_primary_prepare_fb(struct drm_plane *plane,
 305                                    struct drm_plane_state *new_state)
 306 {
 307         struct drm_gem_vram_object *gbo;
 308         int ret;
 309
 310         if (!new_state->fb)
 311                 return 0;
 312
 313         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 314         ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
 315         if (ret)
 316                 DRM_WARN("Error %d pinning new fb, out of video mem?\n", ret);
 317
 318         return ret;
 319 }
 320
 321 static void vbox_primary_cleanup_fb(struct drm_plane *plane,
 322                                     struct drm_plane_state *old_state)
 323 {
 324         struct drm_gem_vram_object *gbo;
 325
 326         if (!old_state->fb)
 327                 return;
 328
 329         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(old_state->fb)->obj);
 330         drm_gem_vram_unpin(gbo);
 331 }
 332
 333 static int vbox_cursor_atomic_check(struct drm_plane *plane,
 334                                     struct drm_plane_state *new_state)
 335 {
 336         struct drm_crtc_state *crtc_state = NULL;
 337         u32 width = new_state->crtc_w;
 338         u32 height = new_state->crtc_h;
 339         int ret;
 340
 341         if (new_state->crtc) {
 342                 crtc_state = drm_atomic_get_existing_crtc_state(
 343                                             new_state->state, new_state->crtc);
 344                 if (WARN_ON(!crtc_state))
 345                         return -EINVAL;
 346         }
 347
 348         ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
 349                                                   DRM_PLANE_HELPER_NO_SCALING,
 350                                                   DRM_PLANE_HELPER_NO_SCALING,
 351                                                   true, true);
 352         if (ret)
 353                 return ret;
 354
 355         if (!new_state->fb)
 356                 return 0;
 357
 358         if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
 359             width == 0 || height == 0)
 360                 return -EINVAL;
 361
 362         return 0;
 363 }
 364
 365 /*
 366  * Copy the ARGB image and generate the mask, which is needed in case the host
 367  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
 368  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
 369  */
 370 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
 371                               size_t mask_size)
 372 {
 373         size_t line_size = (width + 7) / 8;
 374         u32 i, j;
 375
 376         memcpy(dst + mask_size, src, width * height * 4);
 377         for (i = 0; i < height; ++i)
 378                 for (j = 0; j < width; ++j)
 379                         if (((u32 *)src)[i * width + j] > 0xf0000000)
 380                                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
 381 }
 382
 383 static void vbox_cursor_atomic_update(struct drm_plane *plane,
 384                                       struct drm_plane_state *old_state)
 385 {
 386         struct vbox_private *vbox =
 387                 container_of(plane->dev, struct vbox_private, ddev);
 388         struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 389         struct drm_framebuffer *fb = plane->state->fb;
 390         struct drm_gem_vram_object *gbo =
 391                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 392         u32 width = plane->state->crtc_w;
 393         u32 height = plane->state->crtc_h;
 394         size_t data_size, mask_size;
 395         u32 flags;
 396         u8 *src;
 397
 398         /*
 399          * VirtualBox uses the host windowing system to draw the cursor so
 400          * moves are a no-op, we only need to upload new cursor sprites.
 401          */
 402         if (fb == old_state->fb)
 403                 return;
 404
 405         mutex_lock(&vbox->hw_mutex);
 406
 407         vbox_crtc->cursor_enabled = true;
 408
 409         /* pinning is done in prepare/cleanup framebuffer */
 410         src = drm_gem_vram_kmap(gbo, true, NULL);
 411         if (IS_ERR(src)) {
 412                 mutex_unlock(&vbox->hw_mutex);
 413                 DRM_WARN("Could not kmap cursor bo, skipping update\n");
 414                 return;
 415         }
 416
 417         /*
 418          * The mask must be calculated based on the alpha
 419          * channel, one bit per ARGB word, and must be 32-bit
 420          * padded.
 421          */
 422         mask_size = ((width + 7) / 8 * height + 3) & ~3;
 423         data_size = width * height * 4 + mask_size;
 424
 425         copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
 426         drm_gem_vram_kunmap(gbo);
 427
 428         flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 429                 VBOX_MOUSE_POINTER_ALPHA;
 430         hgsmi_update_pointer_shape(vbox->guest_pool, flags,
 431                                    min_t(u32, max(fb->hot_x, 0), width),
 432                                    min_t(u32, max(fb->hot_y, 0), height),
 433                                    width, height, vbox->cursor_data, data_size);
 434
 435         mutex_unlock(&vbox->hw_mutex);
 436 }
 437
 438 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
 439                                        struct drm_plane_state *old_state)
 440 {
 441         struct vbox_private *vbox =
 442                 container_of(plane->dev, struct vbox_private, ddev);
 443         struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
 444         bool cursor_enabled = false;
 445         struct drm_crtc *crtci;
 446
 447         mutex_lock(&vbox->hw_mutex);
 448
 449         vbox_crtc->cursor_enabled = false;
 450
 451         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 452                 if (to_vbox_crtc(crtci)->cursor_enabled)
 453                         cursor_enabled = true;
 454         }
 455
 456         if (!cursor_enabled)
 457                 hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
 458                                            0, 0, NULL, 0);
 459
 460         mutex_unlock(&vbox->hw_mutex);
 461 }
 462
 463 static int vbox_cursor_prepare_fb(struct drm_plane *plane,
 464                                   struct drm_plane_state *new_state)
 465 {
 466         struct drm_gem_vram_object *gbo;
 467
 468         if (!new_state->fb)
 469                 return 0;
 470
 471         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 472         return drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_SYSTEM);
 473 }
 474
 475 static void vbox_cursor_cleanup_fb(struct drm_plane *plane,
 476                                    struct drm_plane_state *old_state)
 477 {
 478         struct drm_gem_vram_object *gbo;
 479
 480         if (!plane->state->fb)
 481                 return;
 482
 483         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(plane->state->fb)->obj);
 484         drm_gem_vram_unpin(gbo);
 485 }
 486
 487 static const u32 vbox_cursor_plane_formats[] = {
 488         DRM_FORMAT_ARGB8888,
 489 };
 490
 491 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
 492         .atomic_check   = vbox_cursor_atomic_check,
 493         .atomic_update  = vbox_cursor_atomic_update,
 494         .atomic_disable = vbox_cursor_atomic_disable,
 495         .prepare_fb     = vbox_cursor_prepare_fb,
 496         .cleanup_fb     = vbox_cursor_cleanup_fb,
 497 };
 498
 499 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
 500         .update_plane   = drm_atomic_helper_update_plane,
 501         .disable_plane  = drm_atomic_helper_disable_plane,
 502         .destroy        = drm_primary_helper_destroy,
 503         .reset          = drm_atomic_helper_plane_reset,
 504         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 505         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 506 };
 507
 508 static const u32 vbox_primary_plane_formats[] = {
 509         DRM_FORMAT_XRGB8888,
 510         DRM_FORMAT_ARGB8888,
 511 };
 512
 513 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 514         .atomic_check = vbox_primary_atomic_check,
 515         .atomic_update = vbox_primary_atomic_update,
 516         .atomic_disable = vbox_primary_atomic_disable,
 517         .prepare_fb = vbox_primary_prepare_fb,
 518         .cleanup_fb = vbox_primary_cleanup_fb,
 519 };
 520
 521 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 522         .update_plane   = drm_atomic_helper_update_plane,
 523         .disable_plane  = drm_atomic_helper_disable_plane,
 524         .destroy        = drm_primary_helper_destroy,
 525         .reset          = drm_atomic_helper_plane_reset,
 526         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 527         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 528 };
 529
 530 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 531                                            unsigned int possible_crtcs,
 532                                            enum drm_plane_type type)
 533 {
 534         const struct drm_plane_helper_funcs *helper_funcs = NULL;
 535         const struct drm_plane_funcs *funcs;
 536         struct drm_plane *plane;
 537         const u32 *formats;
 538         int num_formats;
 539         int err;
 540
 541         if (type == DRM_PLANE_TYPE_PRIMARY) {
 542                 funcs = &vbox_primary_plane_funcs;
 543                 formats = vbox_primary_plane_formats;
 544                 helper_funcs = &vbox_primary_helper_funcs;
 545                 num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 546         } else if (type == DRM_PLANE_TYPE_CURSOR) {
 547                 funcs = &vbox_cursor_plane_funcs;
 548                 formats = vbox_cursor_plane_formats;
 549                 helper_funcs = &vbox_cursor_helper_funcs;
 550                 num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 551         } else {
 552                 return ERR_PTR(-EINVAL);
 553         }
 554
 555         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 556         if (!plane)
 557                 return ERR_PTR(-ENOMEM);
 558
 559         err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 560                                        funcs, formats, num_formats,
 561                                        NULL, type, NULL);
 562         if (err)
 563                 goto free_plane;
 564
 565         drm_plane_helper_add(plane, helper_funcs);
 566
 567         return plane;
 568
 569 free_plane:
 570         kfree(plane);
 571         return ERR_PTR(-EINVAL);
 572 }
 573
 574 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 575 {
 576         struct vbox_private *vbox =
 577                 container_of(dev, struct vbox_private, ddev);
 578         struct drm_plane *cursor = NULL;
 579         struct vbox_crtc *vbox_crtc;
 580         struct drm_plane *primary;
 581         u32 caps = 0;
 582         int ret;
 583
 584         ret = hgsmi_query_conf(vbox->guest_pool,
 585                                VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 586         if (ret)
 587                 return ERR_PTR(ret);
 588
 589         vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 590         if (!vbox_crtc)
 591                 return ERR_PTR(-ENOMEM);
 592
 593         primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 594         if (IS_ERR(primary)) {
 595                 ret = PTR_ERR(primary);
 596                 goto free_mem;
 597         }
 598
 599         if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 600                 cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 601                 if (IS_ERR(cursor)) {
 602                         ret = PTR_ERR(cursor);
 603                         goto clean_primary;
 604                 }
 605         } else {
 606                 DRM_WARN("VirtualBox host is too old, no cursor support\n");
 607         }
 608
 609         vbox_crtc->crtc_id = i;
 610
 611         ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 612                                         &vbox_crtc_funcs, NULL);
 613         if (ret)
 614                 goto clean_cursor;
 615
 616         drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 617         drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 618
 619         return vbox_crtc;
 620
 621 clean_cursor:
 622         if (cursor) {
 623                 drm_plane_cleanup(cursor);
 624                 kfree(cursor);
 625         }
 626 clean_primary:
 627         drm_plane_cleanup(primary);
 628         kfree(primary);
 629 free_mem:
 630         kfree(vbox_crtc);
 631         return ERR_PTR(ret);
 632 }
 633
 634 static void vbox_encoder_destroy(struct drm_encoder *encoder)
 635 {
 636         drm_encoder_cleanup(encoder);
 637         kfree(encoder);
 638 }
 639
 640 static const struct drm_encoder_funcs vbox_enc_funcs = {
 641         .destroy = vbox_encoder_destroy,
 642 };
 643
 644 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 645                                              unsigned int i)
 646 {
 647         struct vbox_encoder *vbox_encoder;
 648
 649         vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 650         if (!vbox_encoder)
 651                 return NULL;
 652
 653         drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 654                          DRM_MODE_ENCODER_DAC, NULL);
 655
 656         vbox_encoder->base.possible_crtcs = 1 << i;
 657         return &vbox_encoder->base;
 658 }
 659
 660 /*
 661  * Generate EDID data with a mode-unique serial number for the virtual
 662  * monitor to try to persuade Unity that different modes correspond to
 663  * different monitors and it should not try to force the same resolution on
 664  * them.
 665  */
 666 static void vbox_set_edid(struct drm_connector *connector, int width,
 667                           int height)
 668 {
 669         enum { EDID_SIZE = 128 };
 670         unsigned char edid[EDID_SIZE] = {
 671                 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 672                 0x58, 0x58,     /* manufacturer (VBX) */
 673                 0x00, 0x00,     /* product code */
 674                 0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 675                 0x01,           /* week of manufacture */
 676                 0x00,           /* year of manufacture */
 677                 0x01, 0x03,     /* EDID version */
 678                 0x80,           /* capabilities - digital */
 679                 0x00,           /* horiz. res in cm, zero for projectors */
 680                 0x00,           /* vert. res in cm */
 681                 0x78,           /* display gamma (120 == 2.2). */
 682                 0xEE,           /* features (standby, suspend, off, RGB, std */
 683                                 /* colour space, preferred timing mode) */
 684                 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 685                 /* chromaticity for standard colour space. */
 686                 0x00, 0x00, 0x00,       /* no default timings */
 687                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 688                     0x01, 0x01,
 689                 0x01, 0x01, 0x01, 0x01, /* no standard timings */
 690                 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 691                     0x02, 0x02,
 692                 /* descriptor block 1 goes below */
 693                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 694                 /* descriptor block 2, monitor ranges */
 695                 0x00, 0x00, 0x00, 0xFD, 0x00,
 696                 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 697                     0x20, 0x20,
 698                 /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 699                 0x20,
 700                 /* descriptor block 3, monitor name */
 701                 0x00, 0x00, 0x00, 0xFC, 0x00,
 702                 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 703                 '\n',
 704                 /* descriptor block 4: dummy data */
 705                 0x00, 0x00, 0x00, 0x10, 0x00,
 706                 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 707                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 708                 0x20,
 709                 0x00,           /* number of extensions */
 710                 0x00            /* checksum goes here */
 711         };
 712         int clock = (width + 6) * (height + 6) * 60 / 10000;
 713         unsigned int i, sum = 0;
 714
 715         edid[12] = width & 0xff;
 716         edid[13] = width >> 8;
 717         edid[14] = height & 0xff;
 718         edid[15] = height >> 8;
 719         edid[54] = clock & 0xff;
 720         edid[55] = clock >> 8;
 721         edid[56] = width & 0xff;
 722         edid[58] = (width >> 4) & 0xf0;
 723         edid[59] = height & 0xff;
 724         edid[61] = (height >> 4) & 0xf0;
 725         for (i = 0; i < EDID_SIZE - 1; ++i)
 726                 sum += edid[i];
 727         edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 728         drm_connector_update_edid_property(connector, (struct edid *)edid);
 729 }
 730
 731 static int vbox_get_modes(struct drm_connector *connector)
 732 {
 733         struct vbox_connector *vbox_connector = NULL;
 734         struct drm_display_mode *mode = NULL;
 735         struct vbox_private *vbox = NULL;
 736         unsigned int num_modes = 0;
 737         int preferred_width, preferred_height;
 738
 739         vbox_connector = to_vbox_connector(connector);
 740         vbox = connector->dev->dev_private;
 741
 742         hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 743                                     HOST_FLAGS_OFFSET);
 744         if (vbox_connector->vbox_crtc->crtc_id == 0)
 745                 vbox_report_caps(vbox);
 746
 747         num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 748         preferred_width = vbox_connector->mode_hint.width ?
 749                           vbox_connector->mode_hint.width : 1024;
 750         preferred_height = vbox_connector->mode_hint.height ?
 751                            vbox_connector->mode_hint.height : 768;
 752         mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 753                             60, false, false, false);
 754         if (mode) {
 755                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 756                 drm_mode_probed_add(connector, mode);
 757                 ++num_modes;
 758         }
 759         vbox_set_edid(connector, preferred_width, preferred_height);
 760
 761         if (vbox_connector->vbox_crtc->x_hint != -1)
 762                 drm_object_property_set_value(&connector->base,
 763                         vbox->ddev.mode_config.suggested_x_property,
 764                         vbox_connector->vbox_crtc->x_hint);
 765         else
 766                 drm_object_property_set_value(&connector->base,
 767                         vbox->ddev.mode_config.suggested_x_property, 0);
 768
 769         if (vbox_connector->vbox_crtc->y_hint != -1)
 770                 drm_object_property_set_value(&connector->base,
 771                         vbox->ddev.mode_config.suggested_y_property,
 772                         vbox_connector->vbox_crtc->y_hint);
 773         else
 774                 drm_object_property_set_value(&connector->base,
 775                         vbox->ddev.mode_config.suggested_y_property, 0);
 776
 777         return num_modes;
 778 }
 779
 780 static void vbox_connector_destroy(struct drm_connector *connector)
 781 {
 782         drm_connector_unregister(connector);
 783         drm_connector_cleanup(connector);
 784         kfree(connector);
 785 }
 786
 787 static enum drm_connector_status
 788 vbox_connector_detect(struct drm_connector *connector, bool force)
 789 {
 790         struct vbox_connector *vbox_connector;
 791
 792         vbox_connector = to_vbox_connector(connector);
 793
 794         return vbox_connector->mode_hint.disconnected ?
 795             connector_status_disconnected : connector_status_connected;
 796 }
 797
 798 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 799                            u32 max_y)
 800 {
 801         struct vbox_connector *vbox_connector;
 802         struct drm_device *dev;
 803         struct drm_display_mode *mode, *iterator;
 804
 805         vbox_connector = to_vbox_connector(connector);
 806         dev = vbox_connector->base.dev;
 807         list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 808                 list_del(&mode->head);
 809                 drm_mode_destroy(dev, mode);
 810         }
 811
 812         return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 813 }
 814
 815 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 816         .get_modes = vbox_get_modes,
 817 };
 818
 819 static const struct drm_connector_funcs vbox_connector_funcs = {
 820         .detect = vbox_connector_detect,
 821         .fill_modes = vbox_fill_modes,
 822         .destroy = vbox_connector_destroy,
 823         .reset = drm_atomic_helper_connector_reset,
 824         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 825         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 826 };
 827
 828 static int vbox_connector_init(struct drm_device *dev,
 829                                struct vbox_crtc *vbox_crtc,
 830                                struct drm_encoder *encoder)
 831 {
 832         struct vbox_connector *vbox_connector;
 833         struct drm_connector *connector;
 834
 835         vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 836         if (!vbox_connector)
 837                 return -ENOMEM;
 838
 839         connector = &vbox_connector->base;
 840         vbox_connector->vbox_crtc = vbox_crtc;
 841
 842         drm_connector_init(dev, connector, &vbox_connector_funcs,
 843                            DRM_MODE_CONNECTOR_VGA);
 844         drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 845
 846         connector->interlace_allowed = 0;
 847         connector->doublescan_allowed = 0;
 848
 849         drm_mode_create_suggested_offset_properties(dev);
 850         drm_object_attach_property(&connector->base,
 851                                    dev->mode_config.suggested_x_property, 0);
 852         drm_object_attach_property(&connector->base,
 853                                    dev->mode_config.suggested_y_property, 0);
 854
 855         drm_connector_attach_encoder(connector, encoder);
 856
 857         return 0;
 858 }
 859
 860 static struct drm_framebuffer *vbox_user_framebuffer_create(
 861                 struct drm_device *dev,
 862                 struct drm_file *filp,
 863                 const struct drm_mode_fb_cmd2 *mode_cmd)
 864 {
 865         struct vbox_private *vbox =
 866                 container_of(dev, struct vbox_private, ddev);
 867         struct drm_gem_object *obj;
 868         struct vbox_framebuffer *vbox_fb;
 869         int ret = -ENOMEM;
 870
 871         obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
 872         if (!obj)
 873                 return ERR_PTR(-ENOENT);
 874
 875         vbox_fb = kzalloc(sizeof(*vbox_fb), GFP_KERNEL);
 876         if (!vbox_fb)
 877                 goto err_unref_obj;
 878
 879         ret = vbox_framebuffer_init(vbox, vbox_fb, mode_cmd, obj);
 880         if (ret)
 881                 goto err_free_vbox_fb;
 882
 883         return &vbox_fb->base;
 884
 885 err_free_vbox_fb:
 886         kfree(vbox_fb);
 887 err_unref_obj:
 888         drm_gem_object_put_unlocked(obj);
 889         return ERR_PTR(ret);
 890 }
 891
 892 static const struct drm_mode_config_funcs vbox_mode_funcs = {
 893         .fb_create = vbox_user_framebuffer_create,
 894         .atomic_check = drm_atomic_helper_check,
 895         .atomic_commit = drm_atomic_helper_commit,
 896 };
 897
 898 int vbox_mode_init(struct vbox_private *vbox)
 899 {
 900         struct drm_device *dev = &vbox->ddev;
 901         struct drm_encoder *encoder;
 902         struct vbox_crtc *vbox_crtc;
 903         unsigned int i;
 904         int ret;
 905
 906         drm_mode_config_init(dev);
 907
 908         dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 909         dev->mode_config.min_width = 0;
 910         dev->mode_config.min_height = 0;
 911         dev->mode_config.preferred_depth = 24;
 912         dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 913         dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 914
 915         for (i = 0; i < vbox->num_crtcs; ++i) {
 916                 vbox_crtc = vbox_crtc_init(dev, i);
 917                 if (IS_ERR(vbox_crtc)) {
 918                         ret = PTR_ERR(vbox_crtc);
 919                         goto err_drm_mode_cleanup;
 920                 }
 921                 encoder = vbox_encoder_init(dev, i);
 922                 if (!encoder) {
 923                         ret = -ENOMEM;
 924                         goto err_drm_mode_cleanup;
 925                 }
 926                 ret = vbox_connector_init(dev, vbox_crtc, encoder);
 927                 if (ret)
 928                         goto err_drm_mode_cleanup;
 929         }
 930
 931         drm_mode_config_reset(dev);
 932         return 0;
 933
 934 err_drm_mode_cleanup:
 935         drm_mode_config_cleanup(dev);
 936         return ret;
 937 }
 938
 939 void vbox_mode_fini(struct vbox_private *vbox)
 940 {
 941         drm_mode_config_cleanup(&vbox->ddev);
 942 }