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
  13 #include <linux/dma-buf-map.h>
  14 #include <linux/export.h>
  15
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_fb_helper.h>
  19 #include <drm/drm_fourcc.h>
  20 #include <drm/drm_gem_framebuffer_helper.h>
  21 #include <drm/drm_plane_helper.h>
  22 #include <drm/drm_probe_helper.h>
  23
  24 #include "hgsmi_channels.h"
  25 #include "vbox_drv.h"
  26 #include "vboxvideo.h"
  27
  28 /*
  29  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
  30  * mode set and tell the host we support advanced graphics functions.
  31  */
  32 static void vbox_do_modeset(struct drm_crtc *crtc)
  33 {
  34         struct drm_framebuffer *fb = crtc->primary->state->fb;
  35         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  36         struct vbox_private *vbox;
  37         int width, height, bpp, pitch;
  38         u16 flags;
  39         s32 x_offset, y_offset;
  40
  41         vbox = to_vbox_dev(crtc->dev);
  42         width = vbox_crtc->width ? vbox_crtc->width : 640;
  43         height = vbox_crtc->height ? vbox_crtc->height : 480;
  44         bpp = fb ? fb->format->cpp[0] * 8 : 32;
  45         pitch = fb ? fb->pitches[0] : width * bpp / 8;
  46         x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
  47         y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
  48
  49         /*
  50          * This is the old way of setting graphics modes.  It assumed one screen
  51          * and a frame-buffer at the start of video RAM.  On older versions of
  52          * VirtualBox, certain parts of the code still assume that the first
  53          * screen is programmed this way, so try to fake it.
  54          */
  55         if (vbox_crtc->crtc_id == 0 && fb &&
  56             vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
  57             vbox_crtc->fb_offset % (bpp / 8) == 0) {
  58                 vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
  59                 vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
  60                 vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
  61                 vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
  62                 vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
  63                 vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
  64                         vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
  65                 vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
  66                                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
  67         }
  68
  69         flags = VBVA_SCREEN_F_ACTIVE;
  70         flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
  71         flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
  72         hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
  73                                    x_offset, y_offset,
  74                                    vbox_crtc->x * bpp / 8 +
  75                                                         vbox_crtc->y * pitch,
  76                                    pitch, width, height, bpp, flags);
  77 }
  78
  79 static int vbox_set_view(struct drm_crtc *crtc)
  80 {
  81         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  82         struct vbox_private *vbox = to_vbox_dev(crtc->dev);
  83         struct vbva_infoview *p;
  84
  85         /*
  86          * Tell the host about the view.  This design originally targeted the
  87          * Windows XP driver architecture and assumed that each screen would
  88          * have a dedicated frame buffer with the command buffer following it,
  89          * the whole being a "view".  The host works out which screen a command
  90          * buffer belongs to by checking whether it is in the first view, then
  91          * whether it is in the second and so on.  The first match wins.  We
  92          * cheat around this by making the first view be the managed memory
  93          * plus the first command buffer, the second the same plus the second
  94          * buffer and so on.
  95          */
  96         p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
  97                                HGSMI_CH_VBVA, VBVA_INFO_VIEW);
  98         if (!p)
  99                 return -ENOMEM;
 100
 101         p->view_index = vbox_crtc->crtc_id;
 102         p->view_offset = vbox_crtc->fb_offset;
 103         p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
 104                        vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
 105         p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
 106
 107         hgsmi_buffer_submit(vbox->guest_pool, p);
 108         hgsmi_buffer_free(vbox->guest_pool, p);
 109
 110         return 0;
 111 }
 112
 113 /*
 114  * Try to map the layout of virtual screens to the range of the input device.
 115  * Return true if we need to re-set the crtc modes due to screen offset
 116  * changes.
 117  */
 118 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 119 {
 120         struct drm_crtc *crtci;
 121         struct drm_connector *connectori;
 122         struct drm_framebuffer *fb, *fb1 = NULL;
 123         bool single_framebuffer = true;
 124         bool old_single_framebuffer = vbox->single_framebuffer;
 125         u16 width = 0, height = 0;
 126
 127         /*
 128          * Are we using an X.Org-style single large frame-buffer for all crtcs?
 129          * If so then screen layout can be deduced from the crtc offsets.
 130          * Same fall-back if this is the fbdev frame-buffer.
 131          */
 132         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 133                 fb = crtci->primary->state->fb;
 134                 if (!fb)
 135                         continue;
 136
 137                 if (!fb1) {
 138                         fb1 = fb;
 139                         if (fb1 == vbox->ddev.fb_helper->fb)
 140                                 break;
 141                 } else if (fb != fb1) {
 142                         single_framebuffer = false;
 143                 }
 144         }
 145         if (!fb1)
 146                 return false;
 147
 148         if (single_framebuffer) {
 149                 vbox->single_framebuffer = true;
 150                 vbox->input_mapping_width = fb1->width;
 151                 vbox->input_mapping_height = fb1->height;
 152                 return old_single_framebuffer != vbox->single_framebuffer;
 153         }
 154         /* Otherwise calculate the total span of all screens. */
 155         list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
 156                             head) {
 157                 struct vbox_connector *vbox_connector =
 158                     to_vbox_connector(connectori);
 159                 struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
 160
 161                 width = max_t(u16, width, vbox_crtc->x_hint +
 162                                           vbox_connector->mode_hint.width);
 163                 height = max_t(u16, height, vbox_crtc->y_hint +
 164                                             vbox_connector->mode_hint.height);
 165         }
 166
 167         vbox->single_framebuffer = false;
 168         vbox->input_mapping_width = width;
 169         vbox->input_mapping_height = height;
 170
 171         return old_single_framebuffer != vbox->single_framebuffer;
 172 }
 173
 174 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 175                                         struct drm_framebuffer *fb,
 176                                         int x, int y)
 177 {
 178         struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
 179         struct vbox_private *vbox = to_vbox_dev(crtc->dev);
 180         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
 181         bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
 182
 183         mutex_lock(&vbox->hw_mutex);
 184
 185         if (crtc->state->enable) {
 186                 vbox_crtc->width = crtc->state->mode.hdisplay;
 187                 vbox_crtc->height = crtc->state->mode.vdisplay;
 188         }
 189
 190         vbox_crtc->x = x;
 191         vbox_crtc->y = y;
 192         vbox_crtc->fb_offset = drm_gem_vram_offset(gbo);
 193
 194         /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
 195         if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
 196                 struct drm_crtc *crtci;
 197
 198                 list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
 199                                     head) {
 200                         if (crtci == crtc)
 201                                 continue;
 202                         vbox_do_modeset(crtci);
 203                 }
 204         }
 205
 206         vbox_set_view(crtc);
 207         vbox_do_modeset(crtc);
 208
 209         if (needs_modeset)
 210                 hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
 211                                            vbox->input_mapping_width,
 212                                            vbox->input_mapping_height);
 213
 214         mutex_unlock(&vbox->hw_mutex);
 215 }
 216
 217 static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
 218                                     struct drm_atomic_state *state)
 219 {
 220 }
 221
 222 static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
 223                                      struct drm_atomic_state *state)
 224 {
 225 }
 226
 227 static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
 228                                    struct drm_atomic_state *state)
 229 {
 230 }
 231
 232 static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
 233         .atomic_enable = vbox_crtc_atomic_enable,
 234         .atomic_disable = vbox_crtc_atomic_disable,
 235         .atomic_flush = vbox_crtc_atomic_flush,
 236 };
 237
 238 static void vbox_crtc_destroy(struct drm_crtc *crtc)
 239 {
 240         drm_crtc_cleanup(crtc);
 241         kfree(crtc);
 242 }
 243
 244 static const struct drm_crtc_funcs vbox_crtc_funcs = {
 245         .set_config = drm_atomic_helper_set_config,
 246         .page_flip = drm_atomic_helper_page_flip,
 247         /* .gamma_set = vbox_crtc_gamma_set, */
 248         .destroy = vbox_crtc_destroy,
 249         .reset = drm_atomic_helper_crtc_reset,
 250         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 251         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 252 };
 253
 254 static int vbox_primary_atomic_check(struct drm_plane *plane,
 255                                      struct drm_plane_state *new_state)
 256 {
 257         struct drm_crtc_state *crtc_state = NULL;
 258
 259         if (new_state->crtc) {
 260                 crtc_state = drm_atomic_get_existing_crtc_state(
 261                                             new_state->state, new_state->crtc);
 262                 if (WARN_ON(!crtc_state))
 263                         return -EINVAL;
 264         }
 265
 266         return drm_atomic_helper_check_plane_state(new_state, crtc_state,
 267                                                    DRM_PLANE_HELPER_NO_SCALING,
 268                                                    DRM_PLANE_HELPER_NO_SCALING,
 269                                                    false, true);
 270 }
 271
 272 static void vbox_primary_atomic_update(struct drm_plane *plane,
 273                                        struct drm_plane_state *old_state)
 274 {
 275         struct drm_crtc *crtc = plane->state->crtc;
 276         struct drm_framebuffer *fb = plane->state->fb;
 277         struct vbox_private *vbox = to_vbox_dev(fb->dev);
 278         struct drm_mode_rect *clips;
 279         uint32_t num_clips, i;
 280
 281         vbox_crtc_set_base_and_mode(crtc, fb,
 282                                     plane->state->src_x >> 16,
 283                                     plane->state->src_y >> 16);
 284
 285         /* Send information about dirty rectangles to VBVA. */
 286
 287         clips = drm_plane_get_damage_clips(plane->state);
 288         num_clips = drm_plane_get_damage_clips_count(plane->state);
 289
 290         if (!num_clips)
 291                 return;
 292
 293         mutex_lock(&vbox->hw_mutex);
 294
 295         for (i = 0; i < num_clips; ++i, ++clips) {
 296                 struct vbva_cmd_hdr cmd_hdr;
 297                 unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;
 298
 299                 cmd_hdr.x = (s16)clips->x1;
 300                 cmd_hdr.y = (s16)clips->y1;
 301                 cmd_hdr.w = (u16)clips->x2 - clips->x1;
 302                 cmd_hdr.h = (u16)clips->y2 - clips->y1;
 303
 304                 if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id],
 305                                               vbox->guest_pool))
 306                         continue;
 307
 308                 vbva_write(&vbox->vbva_info[crtc_id], vbox->guest_pool,
 309                            &cmd_hdr, sizeof(cmd_hdr));
 310                 vbva_buffer_end_update(&vbox->vbva_info[crtc_id]);
 311         }
 312
 313         mutex_unlock(&vbox->hw_mutex);
 314 }
 315
 316 static void vbox_primary_atomic_disable(struct drm_plane *plane,
 317                                         struct drm_plane_state *old_state)
 318 {
 319         struct drm_crtc *crtc = old_state->crtc;
 320
 321         /* vbox_do_modeset checks plane->state->fb and will disable if NULL */
 322         vbox_crtc_set_base_and_mode(crtc, old_state->fb,
 323                                     old_state->src_x >> 16,
 324                                     old_state->src_y >> 16);
 325 }
 326
 327 static int vbox_cursor_atomic_check(struct drm_plane *plane,
 328                                     struct drm_plane_state *new_state)
 329 {
 330         struct drm_crtc_state *crtc_state = NULL;
 331         u32 width = new_state->crtc_w;
 332         u32 height = new_state->crtc_h;
 333         int ret;
 334
 335         if (new_state->crtc) {
 336                 crtc_state = drm_atomic_get_existing_crtc_state(
 337                                             new_state->state, new_state->crtc);
 338                 if (WARN_ON(!crtc_state))
 339                         return -EINVAL;
 340         }
 341
 342         ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
 343                                                   DRM_PLANE_HELPER_NO_SCALING,
 344                                                   DRM_PLANE_HELPER_NO_SCALING,
 345                                                   true, true);
 346         if (ret)
 347                 return ret;
 348
 349         if (!new_state->fb)
 350                 return 0;
 351
 352         if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
 353             width == 0 || height == 0)
 354                 return -EINVAL;
 355
 356         return 0;
 357 }
 358
 359 /*
 360  * Copy the ARGB image and generate the mask, which is needed in case the host
 361  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
 362  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
 363  */
 364 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
 365                               size_t mask_size)
 366 {
 367         size_t line_size = (width + 7) / 8;
 368         u32 i, j;
 369
 370         memcpy(dst + mask_size, src, width * height * 4);
 371         for (i = 0; i < height; ++i)
 372                 for (j = 0; j < width; ++j)
 373                         if (((u32 *)src)[i * width + j] > 0xf0000000)
 374                                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
 375 }
 376
 377 static void vbox_cursor_atomic_update(struct drm_plane *plane,
 378                                       struct drm_plane_state *old_state)
 379 {
 380         struct vbox_private *vbox =
 381                 container_of(plane->dev, struct vbox_private, ddev);
 382         struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 383         struct drm_framebuffer *fb = plane->state->fb;
 384         struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
 385         u32 width = plane->state->crtc_w;
 386         u32 height = plane->state->crtc_h;
 387         size_t data_size, mask_size;
 388         u32 flags;
 389         struct dma_buf_map map;
 390         int ret;
 391         u8 *src;
 392
 393         /*
 394          * VirtualBox uses the host windowing system to draw the cursor so
 395          * moves are a no-op, we only need to upload new cursor sprites.
 396          */
 397         if (fb == old_state->fb)
 398                 return;
 399
 400         mutex_lock(&vbox->hw_mutex);
 401
 402         vbox_crtc->cursor_enabled = true;
 403
 404         ret = drm_gem_vram_vmap(gbo, &map);
 405         if (ret) {
 406                 /*
 407                  * BUG: we should have pinned the BO in prepare_fb().
 408                  */
 409                 mutex_unlock(&vbox->hw_mutex);
 410                 DRM_WARN("Could not map cursor bo, skipping update\n");
 411                 return;
 412         }
 413         src = map.vaddr; /* TODO: Use mapping abstraction properly */
 414
 415         /*
 416          * The mask must be calculated based on the alpha
 417          * channel, one bit per ARGB word, and must be 32-bit
 418          * padded.
 419          */
 420         mask_size = ((width + 7) / 8 * height + 3) & ~3;
 421         data_size = width * height * 4 + mask_size;
 422
 423         copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
 424         drm_gem_vram_vunmap(gbo, &map);
 425
 426         flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 427                 VBOX_MOUSE_POINTER_ALPHA;
 428         hgsmi_update_pointer_shape(vbox->guest_pool, flags,
 429                                    min_t(u32, max(fb->hot_x, 0), width),
 430                                    min_t(u32, max(fb->hot_y, 0), height),
 431                                    width, height, vbox->cursor_data, data_size);
 432
 433         mutex_unlock(&vbox->hw_mutex);
 434 }
 435
 436 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
 437                                        struct drm_plane_state *old_state)
 438 {
 439         struct vbox_private *vbox =
 440                 container_of(plane->dev, struct vbox_private, ddev);
 441         struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
 442         bool cursor_enabled = false;
 443         struct drm_crtc *crtci;
 444
 445         mutex_lock(&vbox->hw_mutex);
 446
 447         vbox_crtc->cursor_enabled = false;
 448
 449         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 450                 if (to_vbox_crtc(crtci)->cursor_enabled)
 451                         cursor_enabled = true;
 452         }
 453
 454         if (!cursor_enabled)
 455                 hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
 456                                            0, 0, NULL, 0);
 457
 458         mutex_unlock(&vbox->hw_mutex);
 459 }
 460
 461 static const u32 vbox_cursor_plane_formats[] = {
 462         DRM_FORMAT_ARGB8888,
 463 };
 464
 465 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
 466         .atomic_check   = vbox_cursor_atomic_check,
 467         .atomic_update  = vbox_cursor_atomic_update,
 468         .atomic_disable = vbox_cursor_atomic_disable,
 469         .prepare_fb     = drm_gem_vram_plane_helper_prepare_fb,
 470         .cleanup_fb     = drm_gem_vram_plane_helper_cleanup_fb,
 471 };
 472
 473 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
 474         .update_plane   = drm_atomic_helper_update_plane,
 475         .disable_plane  = drm_atomic_helper_disable_plane,
 476         .destroy        = drm_primary_helper_destroy,
 477         .reset          = drm_atomic_helper_plane_reset,
 478         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 479         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 480 };
 481
 482 static const u32 vbox_primary_plane_formats[] = {
 483         DRM_FORMAT_XRGB8888,
 484         DRM_FORMAT_ARGB8888,
 485 };
 486
 487 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 488         .atomic_check = vbox_primary_atomic_check,
 489         .atomic_update = vbox_primary_atomic_update,
 490         .atomic_disable = vbox_primary_atomic_disable,
 491         .prepare_fb     = drm_gem_vram_plane_helper_prepare_fb,
 492         .cleanup_fb     = drm_gem_vram_plane_helper_cleanup_fb,
 493 };
 494
 495 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 496         .update_plane   = drm_atomic_helper_update_plane,
 497         .disable_plane  = drm_atomic_helper_disable_plane,
 498         .destroy        = drm_primary_helper_destroy,
 499         .reset          = drm_atomic_helper_plane_reset,
 500         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 501         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 502 };
 503
 504 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 505                                            unsigned int possible_crtcs,
 506                                            enum drm_plane_type type)
 507 {
 508         const struct drm_plane_helper_funcs *helper_funcs = NULL;
 509         const struct drm_plane_funcs *funcs;
 510         struct drm_plane *plane;
 511         const u32 *formats;
 512         int num_formats;
 513         int err;
 514
 515         if (type == DRM_PLANE_TYPE_PRIMARY) {
 516                 funcs = &vbox_primary_plane_funcs;
 517                 formats = vbox_primary_plane_formats;
 518                 helper_funcs = &vbox_primary_helper_funcs;
 519                 num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 520         } else if (type == DRM_PLANE_TYPE_CURSOR) {
 521                 funcs = &vbox_cursor_plane_funcs;
 522                 formats = vbox_cursor_plane_formats;
 523                 helper_funcs = &vbox_cursor_helper_funcs;
 524                 num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 525         } else {
 526                 return ERR_PTR(-EINVAL);
 527         }
 528
 529         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 530         if (!plane)
 531                 return ERR_PTR(-ENOMEM);
 532
 533         err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 534                                        funcs, formats, num_formats,
 535                                        NULL, type, NULL);
 536         if (err)
 537                 goto free_plane;
 538
 539         drm_plane_helper_add(plane, helper_funcs);
 540
 541         return plane;
 542
 543 free_plane:
 544         kfree(plane);
 545         return ERR_PTR(-EINVAL);
 546 }
 547
 548 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 549 {
 550         struct vbox_private *vbox =
 551                 container_of(dev, struct vbox_private, ddev);
 552         struct drm_plane *cursor = NULL;
 553         struct vbox_crtc *vbox_crtc;
 554         struct drm_plane *primary;
 555         u32 caps = 0;
 556         int ret;
 557
 558         ret = hgsmi_query_conf(vbox->guest_pool,
 559                                VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 560         if (ret)
 561                 return ERR_PTR(ret);
 562
 563         vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 564         if (!vbox_crtc)
 565                 return ERR_PTR(-ENOMEM);
 566
 567         primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 568         if (IS_ERR(primary)) {
 569                 ret = PTR_ERR(primary);
 570                 goto free_mem;
 571         }
 572
 573         if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 574                 cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 575                 if (IS_ERR(cursor)) {
 576                         ret = PTR_ERR(cursor);
 577                         goto clean_primary;
 578                 }
 579         } else {
 580                 DRM_WARN("VirtualBox host is too old, no cursor support\n");
 581         }
 582
 583         vbox_crtc->crtc_id = i;
 584
 585         ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 586                                         &vbox_crtc_funcs, NULL);
 587         if (ret)
 588                 goto clean_cursor;
 589
 590         drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 591         drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 592
 593         return vbox_crtc;
 594
 595 clean_cursor:
 596         if (cursor) {
 597                 drm_plane_cleanup(cursor);
 598                 kfree(cursor);
 599         }
 600 clean_primary:
 601         drm_plane_cleanup(primary);
 602         kfree(primary);
 603 free_mem:
 604         kfree(vbox_crtc);
 605         return ERR_PTR(ret);
 606 }
 607
 608 static void vbox_encoder_destroy(struct drm_encoder *encoder)
 609 {
 610         drm_encoder_cleanup(encoder);
 611         kfree(encoder);
 612 }
 613
 614 static const struct drm_encoder_funcs vbox_enc_funcs = {
 615         .destroy = vbox_encoder_destroy,
 616 };
 617
 618 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 619                                              unsigned int i)
 620 {
 621         struct vbox_encoder *vbox_encoder;
 622
 623         vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 624         if (!vbox_encoder)
 625                 return NULL;
 626
 627         drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 628                          DRM_MODE_ENCODER_DAC, NULL);
 629
 630         vbox_encoder->base.possible_crtcs = 1 << i;
 631         return &vbox_encoder->base;
 632 }
 633
 634 /*
 635  * Generate EDID data with a mode-unique serial number for the virtual
 636  * monitor to try to persuade Unity that different modes correspond to
 637  * different monitors and it should not try to force the same resolution on
 638  * them.
 639  */
 640 static void vbox_set_edid(struct drm_connector *connector, int width,
 641                           int height)
 642 {
 643         enum { EDID_SIZE = 128 };
 644         unsigned char edid[EDID_SIZE] = {
 645                 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 646                 0x58, 0x58,     /* manufacturer (VBX) */
 647                 0x00, 0x00,     /* product code */
 648                 0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 649                 0x01,           /* week of manufacture */
 650                 0x00,           /* year of manufacture */
 651                 0x01, 0x03,     /* EDID version */
 652                 0x80,           /* capabilities - digital */
 653                 0x00,           /* horiz. res in cm, zero for projectors */
 654                 0x00,           /* vert. res in cm */
 655                 0x78,           /* display gamma (120 == 2.2). */
 656                 0xEE,           /* features (standby, suspend, off, RGB, std */
 657                                 /* colour space, preferred timing mode) */
 658                 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 659                 /* chromaticity for standard colour space. */
 660                 0x00, 0x00, 0x00,       /* no default timings */
 661                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 662                     0x01, 0x01,
 663                 0x01, 0x01, 0x01, 0x01, /* no standard timings */
 664                 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 665                     0x02, 0x02,
 666                 /* descriptor block 1 goes below */
 667                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 668                 /* descriptor block 2, monitor ranges */
 669                 0x00, 0x00, 0x00, 0xFD, 0x00,
 670                 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 671                     0x20, 0x20,
 672                 /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 673                 0x20,
 674                 /* descriptor block 3, monitor name */
 675                 0x00, 0x00, 0x00, 0xFC, 0x00,
 676                 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 677                 '\n',
 678                 /* descriptor block 4: dummy data */
 679                 0x00, 0x00, 0x00, 0x10, 0x00,
 680                 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 681                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 682                 0x20,
 683                 0x00,           /* number of extensions */
 684                 0x00            /* checksum goes here */
 685         };
 686         int clock = (width + 6) * (height + 6) * 60 / 10000;
 687         unsigned int i, sum = 0;
 688
 689         edid[12] = width & 0xff;
 690         edid[13] = width >> 8;
 691         edid[14] = height & 0xff;
 692         edid[15] = height >> 8;
 693         edid[54] = clock & 0xff;
 694         edid[55] = clock >> 8;
 695         edid[56] = width & 0xff;
 696         edid[58] = (width >> 4) & 0xf0;
 697         edid[59] = height & 0xff;
 698         edid[61] = (height >> 4) & 0xf0;
 699         for (i = 0; i < EDID_SIZE - 1; ++i)
 700                 sum += edid[i];
 701         edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 702         drm_connector_update_edid_property(connector, (struct edid *)edid);
 703 }
 704
 705 static int vbox_get_modes(struct drm_connector *connector)
 706 {
 707         struct vbox_connector *vbox_connector = NULL;
 708         struct drm_display_mode *mode = NULL;
 709         struct vbox_private *vbox = NULL;
 710         unsigned int num_modes = 0;
 711         int preferred_width, preferred_height;
 712
 713         vbox_connector = to_vbox_connector(connector);
 714         vbox = to_vbox_dev(connector->dev);
 715
 716         hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 717                                     HOST_FLAGS_OFFSET);
 718         if (vbox_connector->vbox_crtc->crtc_id == 0)
 719                 vbox_report_caps(vbox);
 720
 721         num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 722         preferred_width = vbox_connector->mode_hint.width ?
 723                           vbox_connector->mode_hint.width : 1024;
 724         preferred_height = vbox_connector->mode_hint.height ?
 725                            vbox_connector->mode_hint.height : 768;
 726         mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 727                             60, false, false, false);
 728         if (mode) {
 729                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 730                 drm_mode_probed_add(connector, mode);
 731                 ++num_modes;
 732         }
 733         vbox_set_edid(connector, preferred_width, preferred_height);
 734
 735         if (vbox_connector->vbox_crtc->x_hint != -1)
 736                 drm_object_property_set_value(&connector->base,
 737                         vbox->ddev.mode_config.suggested_x_property,
 738                         vbox_connector->vbox_crtc->x_hint);
 739         else
 740                 drm_object_property_set_value(&connector->base,
 741                         vbox->ddev.mode_config.suggested_x_property, 0);
 742
 743         if (vbox_connector->vbox_crtc->y_hint != -1)
 744                 drm_object_property_set_value(&connector->base,
 745                         vbox->ddev.mode_config.suggested_y_property,
 746                         vbox_connector->vbox_crtc->y_hint);
 747         else
 748                 drm_object_property_set_value(&connector->base,
 749                         vbox->ddev.mode_config.suggested_y_property, 0);
 750
 751         return num_modes;
 752 }
 753
 754 static void vbox_connector_destroy(struct drm_connector *connector)
 755 {
 756         drm_connector_unregister(connector);
 757         drm_connector_cleanup(connector);
 758         kfree(connector);
 759 }
 760
 761 static enum drm_connector_status
 762 vbox_connector_detect(struct drm_connector *connector, bool force)
 763 {
 764         struct vbox_connector *vbox_connector;
 765
 766         vbox_connector = to_vbox_connector(connector);
 767
 768         return vbox_connector->mode_hint.disconnected ?
 769             connector_status_disconnected : connector_status_connected;
 770 }
 771
 772 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 773                            u32 max_y)
 774 {
 775         struct vbox_connector *vbox_connector;
 776         struct drm_device *dev;
 777         struct drm_display_mode *mode, *iterator;
 778
 779         vbox_connector = to_vbox_connector(connector);
 780         dev = vbox_connector->base.dev;
 781         list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 782                 list_del(&mode->head);
 783                 drm_mode_destroy(dev, mode);
 784         }
 785
 786         return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 787 }
 788
 789 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 790         .get_modes = vbox_get_modes,
 791 };
 792
 793 static const struct drm_connector_funcs vbox_connector_funcs = {
 794         .detect = vbox_connector_detect,
 795         .fill_modes = vbox_fill_modes,
 796         .destroy = vbox_connector_destroy,
 797         .reset = drm_atomic_helper_connector_reset,
 798         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 799         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 800 };
 801
 802 static int vbox_connector_init(struct drm_device *dev,
 803                                struct vbox_crtc *vbox_crtc,
 804                                struct drm_encoder *encoder)
 805 {
 806         struct vbox_connector *vbox_connector;
 807         struct drm_connector *connector;
 808
 809         vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 810         if (!vbox_connector)
 811                 return -ENOMEM;
 812
 813         connector = &vbox_connector->base;
 814         vbox_connector->vbox_crtc = vbox_crtc;
 815
 816         drm_connector_init(dev, connector, &vbox_connector_funcs,
 817                            DRM_MODE_CONNECTOR_VGA);
 818         drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 819
 820         connector->interlace_allowed = 0;
 821         connector->doublescan_allowed = 0;
 822
 823         drm_mode_create_suggested_offset_properties(dev);
 824         drm_object_attach_property(&connector->base,
 825                                    dev->mode_config.suggested_x_property, 0);
 826         drm_object_attach_property(&connector->base,
 827                                    dev->mode_config.suggested_y_property, 0);
 828
 829         drm_connector_attach_encoder(connector, encoder);
 830
 831         return 0;
 832 }
 833
 834 static const struct drm_mode_config_funcs vbox_mode_funcs = {
 835         .fb_create = drm_gem_fb_create_with_dirty,
 836         .mode_valid = drm_vram_helper_mode_valid,
 837         .atomic_check = drm_atomic_helper_check,
 838         .atomic_commit = drm_atomic_helper_commit,
 839 };
 840
 841 int vbox_mode_init(struct vbox_private *vbox)
 842 {
 843         struct drm_device *dev = &vbox->ddev;
 844         struct drm_encoder *encoder;
 845         struct vbox_crtc *vbox_crtc;
 846         unsigned int i;
 847         int ret;
 848
 849         drm_mode_config_init(dev);
 850
 851         dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 852         dev->mode_config.min_width = 0;
 853         dev->mode_config.min_height = 0;
 854         dev->mode_config.preferred_depth = 24;
 855         dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 856         dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 857
 858         for (i = 0; i < vbox->num_crtcs; ++i) {
 859                 vbox_crtc = vbox_crtc_init(dev, i);
 860                 if (IS_ERR(vbox_crtc)) {
 861                         ret = PTR_ERR(vbox_crtc);
 862                         goto err_drm_mode_cleanup;
 863                 }
 864                 encoder = vbox_encoder_init(dev, i);
 865                 if (!encoder) {
 866                         ret = -ENOMEM;
 867                         goto err_drm_mode_cleanup;
 868                 }
 869                 ret = vbox_connector_init(dev, vbox_crtc, encoder);
 870                 if (ret)
 871                         goto err_drm_mode_cleanup;
 872         }
 873
 874         drm_mode_config_reset(dev);
 875         return 0;
 876
 877 err_drm_mode_cleanup:
 878         drm_mode_config_cleanup(dev);
 879         return ret;
 880 }
 881
 882 void vbox_mode_fini(struct vbox_private *vbox)
 883 {
 884         drm_mode_config_cleanup(&vbox->ddev);
 885 }