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_gem_framebuffer_helper.h>
  19 #include <drm/drm_plane_helper.h>
  20 #include <drm/drm_probe_helper.h>
  21 #include <drm/drm_vblank.h>
  22
  23 #include "hgsmi_channels.h"
  24 #include "vbox_drv.h"
  25 #include "vboxvideo.h"
  26
  27 /*
  28  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
  29  * mode set and tell the host we support advanced graphics functions.
  30  */
  31 static void vbox_do_modeset(struct drm_crtc *crtc)
  32 {
  33         struct drm_framebuffer *fb = crtc->primary->state->fb;
  34         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  35         struct vbox_private *vbox;
  36         int width, height, bpp, pitch;
  37         u16 flags;
  38         s32 x_offset, y_offset;
  39
  40         vbox = crtc->dev->dev_private;
  41         width = vbox_crtc->width ? vbox_crtc->width : 640;
  42         height = vbox_crtc->height ? vbox_crtc->height : 480;
  43         bpp = fb ? fb->format->cpp[0] * 8 : 32;
  44         pitch = fb ? fb->pitches[0] : width * bpp / 8;
  45         x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
  46         y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
  47
  48         /*
  49          * This is the old way of setting graphics modes.  It assumed one screen
  50          * and a frame-buffer at the start of video RAM.  On older versions of
  51          * VirtualBox, certain parts of the code still assume that the first
  52          * screen is programmed this way, so try to fake it.
  53          */
  54         if (vbox_crtc->crtc_id == 0 && fb &&
  55             vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
  56             vbox_crtc->fb_offset % (bpp / 8) == 0) {
  57                 vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
  58                 vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
  59                 vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
  60                 vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
  61                 vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
  62                 vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
  63                         vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
  64                 vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
  65                                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
  66         }
  67
  68         flags = VBVA_SCREEN_F_ACTIVE;
  69         flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
  70         flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
  71         hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
  72                                    x_offset, y_offset,
  73                                    vbox_crtc->x * bpp / 8 +
  74                                                         vbox_crtc->y * pitch,
  75                                    pitch, width, height, bpp, flags);
  76 }
  77
  78 static int vbox_set_view(struct drm_crtc *crtc)
  79 {
  80         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  81         struct vbox_private *vbox = crtc->dev->dev_private;
  82         struct vbva_infoview *p;
  83
  84         /*
  85          * Tell the host about the view.  This design originally targeted the
  86          * Windows XP driver architecture and assumed that each screen would
  87          * have a dedicated frame buffer with the command buffer following it,
  88          * the whole being a "view".  The host works out which screen a command
  89          * buffer belongs to by checking whether it is in the first view, then
  90          * whether it is in the second and so on.  The first match wins.  We
  91          * cheat around this by making the first view be the managed memory
  92          * plus the first command buffer, the second the same plus the second
  93          * buffer and so on.
  94          */
  95         p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
  96                                HGSMI_CH_VBVA, VBVA_INFO_VIEW);
  97         if (!p)
  98                 return -ENOMEM;
  99
 100         p->view_index = vbox_crtc->crtc_id;
 101         p->view_offset = vbox_crtc->fb_offset;
 102         p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
 103                        vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
 104         p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
 105
 106         hgsmi_buffer_submit(vbox->guest_pool, p);
 107         hgsmi_buffer_free(vbox->guest_pool, p);
 108
 109         return 0;
 110 }
 111
 112 /*
 113  * Try to map the layout of virtual screens to the range of the input device.
 114  * Return true if we need to re-set the crtc modes due to screen offset
 115  * changes.
 116  */
 117 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 118 {
 119         struct drm_crtc *crtci;
 120         struct drm_connector *connectori;
 121         struct drm_framebuffer *fb, *fb1 = NULL;
 122         bool single_framebuffer = true;
 123         bool old_single_framebuffer = vbox->single_framebuffer;
 124         u16 width = 0, height = 0;
 125
 126         /*
 127          * Are we using an X.Org-style single large frame-buffer for all crtcs?
 128          * If so then screen layout can be deduced from the crtc offsets.
 129          * Same fall-back if this is the fbdev frame-buffer.
 130          */
 131         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 132                 fb = crtci->primary->state->fb;
 133                 if (!fb)
 134                         continue;
 135
 136                 if (!fb1) {
 137                         fb1 = fb;
 138                         if (fb1 == vbox->ddev.fb_helper->fb)
 139                                 break;
 140                 } else if (fb != fb1) {
 141                         single_framebuffer = false;
 142                 }
 143         }
 144         if (!fb1)
 145                 return false;
 146
 147         if (single_framebuffer) {
 148                 vbox->single_framebuffer = true;
 149                 vbox->input_mapping_width = fb1->width;
 150                 vbox->input_mapping_height = fb1->height;
 151                 return old_single_framebuffer != vbox->single_framebuffer;
 152         }
 153         /* Otherwise calculate the total span of all screens. */
 154         list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
 155                             head) {
 156                 struct vbox_connector *vbox_connector =
 157                     to_vbox_connector(connectori);
 158                 struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
 159
 160                 width = max_t(u16, width, vbox_crtc->x_hint +
 161                                           vbox_connector->mode_hint.width);
 162                 height = max_t(u16, height, vbox_crtc->y_hint +
 163                                             vbox_connector->mode_hint.height);
 164         }
 165
 166         vbox->single_framebuffer = false;
 167         vbox->input_mapping_width = width;
 168         vbox->input_mapping_height = height;
 169
 170         return old_single_framebuffer != vbox->single_framebuffer;
 171 }
 172
 173 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 174                                         struct drm_framebuffer *fb,
 175                                         int x, int y)
 176 {
 177         struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
 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         struct vbox_private *vbox = fb->dev->dev_private;
 288         struct drm_mode_rect *clips;
 289         uint32_t num_clips, i;
 290
 291         vbox_crtc_set_base_and_mode(crtc, fb,
 292                                     plane->state->src_x >> 16,
 293                                     plane->state->src_y >> 16);
 294
 295         /* Send information about dirty rectangles to VBVA. */
 296
 297         clips = drm_plane_get_damage_clips(plane->state);
 298         num_clips = drm_plane_get_damage_clips_count(plane->state);
 299
 300         if (!num_clips)
 301                 return;
 302
 303         mutex_lock(&vbox->hw_mutex);
 304
 305         for (i = 0; i < num_clips; ++i, ++clips) {
 306                 struct vbva_cmd_hdr cmd_hdr;
 307                 unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;
 308
 309                 cmd_hdr.x = (s16)clips->x1;
 310                 cmd_hdr.y = (s16)clips->y1;
 311                 cmd_hdr.w = (u16)clips->x2 - clips->x1;
 312                 cmd_hdr.h = (u16)clips->y2 - clips->y1;
 313
 314                 if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id],
 315                                               vbox->guest_pool))
 316                         continue;
 317
 318                 vbva_write(&vbox->vbva_info[crtc_id], vbox->guest_pool,
 319                            &cmd_hdr, sizeof(cmd_hdr));
 320                 vbva_buffer_end_update(&vbox->vbva_info[crtc_id]);
 321         }
 322
 323         mutex_unlock(&vbox->hw_mutex);
 324 }
 325
 326 static void vbox_primary_atomic_disable(struct drm_plane *plane,
 327                                         struct drm_plane_state *old_state)
 328 {
 329         struct drm_crtc *crtc = old_state->crtc;
 330
 331         /* vbox_do_modeset checks plane->state->fb and will disable if NULL */
 332         vbox_crtc_set_base_and_mode(crtc, old_state->fb,
 333                                     old_state->src_x >> 16,
 334                                     old_state->src_y >> 16);
 335 }
 336
 337 static int vbox_cursor_atomic_check(struct drm_plane *plane,
 338                                     struct drm_plane_state *new_state)
 339 {
 340         struct drm_crtc_state *crtc_state = NULL;
 341         u32 width = new_state->crtc_w;
 342         u32 height = new_state->crtc_h;
 343         int ret;
 344
 345         if (new_state->crtc) {
 346                 crtc_state = drm_atomic_get_existing_crtc_state(
 347                                             new_state->state, new_state->crtc);
 348                 if (WARN_ON(!crtc_state))
 349                         return -EINVAL;
 350         }
 351
 352         ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
 353                                                   DRM_PLANE_HELPER_NO_SCALING,
 354                                                   DRM_PLANE_HELPER_NO_SCALING,
 355                                                   true, true);
 356         if (ret)
 357                 return ret;
 358
 359         if (!new_state->fb)
 360                 return 0;
 361
 362         if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
 363             width == 0 || height == 0)
 364                 return -EINVAL;
 365
 366         return 0;
 367 }
 368
 369 /*
 370  * Copy the ARGB image and generate the mask, which is needed in case the host
 371  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
 372  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
 373  */
 374 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
 375                               size_t mask_size)
 376 {
 377         size_t line_size = (width + 7) / 8;
 378         u32 i, j;
 379
 380         memcpy(dst + mask_size, src, width * height * 4);
 381         for (i = 0; i < height; ++i)
 382                 for (j = 0; j < width; ++j)
 383                         if (((u32 *)src)[i * width + j] > 0xf0000000)
 384                                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
 385 }
 386
 387 static void vbox_cursor_atomic_update(struct drm_plane *plane,
 388                                       struct drm_plane_state *old_state)
 389 {
 390         struct vbox_private *vbox =
 391                 container_of(plane->dev, struct vbox_private, ddev);
 392         struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 393         struct drm_framebuffer *fb = plane->state->fb;
 394         struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
 395         u32 width = plane->state->crtc_w;
 396         u32 height = plane->state->crtc_h;
 397         size_t data_size, mask_size;
 398         u32 flags;
 399         u8 *src;
 400
 401         /*
 402          * VirtualBox uses the host windowing system to draw the cursor so
 403          * moves are a no-op, we only need to upload new cursor sprites.
 404          */
 405         if (fb == old_state->fb)
 406                 return;
 407
 408         mutex_lock(&vbox->hw_mutex);
 409
 410         vbox_crtc->cursor_enabled = true;
 411
 412         /* pinning is done in prepare/cleanup framebuffer */
 413         src = drm_gem_vram_kmap(gbo, true, NULL);
 414         if (IS_ERR(src)) {
 415                 mutex_unlock(&vbox->hw_mutex);
 416                 DRM_WARN("Could not kmap cursor bo, skipping update\n");
 417                 return;
 418         }
 419
 420         /*
 421          * The mask must be calculated based on the alpha
 422          * channel, one bit per ARGB word, and must be 32-bit
 423          * padded.
 424          */
 425         mask_size = ((width + 7) / 8 * height + 3) & ~3;
 426         data_size = width * height * 4 + mask_size;
 427
 428         copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
 429         drm_gem_vram_kunmap(gbo);
 430
 431         flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 432                 VBOX_MOUSE_POINTER_ALPHA;
 433         hgsmi_update_pointer_shape(vbox->guest_pool, flags,
 434                                    min_t(u32, max(fb->hot_x, 0), width),
 435                                    min_t(u32, max(fb->hot_y, 0), height),
 436                                    width, height, vbox->cursor_data, data_size);
 437
 438         mutex_unlock(&vbox->hw_mutex);
 439 }
 440
 441 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
 442                                        struct drm_plane_state *old_state)
 443 {
 444         struct vbox_private *vbox =
 445                 container_of(plane->dev, struct vbox_private, ddev);
 446         struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
 447         bool cursor_enabled = false;
 448         struct drm_crtc *crtci;
 449
 450         mutex_lock(&vbox->hw_mutex);
 451
 452         vbox_crtc->cursor_enabled = false;
 453
 454         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 455                 if (to_vbox_crtc(crtci)->cursor_enabled)
 456                         cursor_enabled = true;
 457         }
 458
 459         if (!cursor_enabled)
 460                 hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
 461                                            0, 0, NULL, 0);
 462
 463         mutex_unlock(&vbox->hw_mutex);
 464 }
 465
 466 static const u32 vbox_cursor_plane_formats[] = {
 467         DRM_FORMAT_ARGB8888,
 468 };
 469
 470 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
 471         .atomic_check   = vbox_cursor_atomic_check,
 472         .atomic_update  = vbox_cursor_atomic_update,
 473         .atomic_disable = vbox_cursor_atomic_disable,
 474         .prepare_fb     = drm_gem_vram_plane_helper_prepare_fb,
 475         .cleanup_fb     = drm_gem_vram_plane_helper_cleanup_fb,
 476 };
 477
 478 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
 479         .update_plane   = drm_atomic_helper_update_plane,
 480         .disable_plane  = drm_atomic_helper_disable_plane,
 481         .destroy        = drm_primary_helper_destroy,
 482         .reset          = drm_atomic_helper_plane_reset,
 483         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 484         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 485 };
 486
 487 static const u32 vbox_primary_plane_formats[] = {
 488         DRM_FORMAT_XRGB8888,
 489         DRM_FORMAT_ARGB8888,
 490 };
 491
 492 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 493         .atomic_check = vbox_primary_atomic_check,
 494         .atomic_update = vbox_primary_atomic_update,
 495         .atomic_disable = vbox_primary_atomic_disable,
 496         .prepare_fb     = drm_gem_vram_plane_helper_prepare_fb,
 497         .cleanup_fb     = drm_gem_vram_plane_helper_cleanup_fb,
 498 };
 499
 500 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 501         .update_plane   = drm_atomic_helper_update_plane,
 502         .disable_plane  = drm_atomic_helper_disable_plane,
 503         .destroy        = drm_primary_helper_destroy,
 504         .reset          = drm_atomic_helper_plane_reset,
 505         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 506         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 507 };
 508
 509 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 510                                            unsigned int possible_crtcs,
 511                                            enum drm_plane_type type)
 512 {
 513         const struct drm_plane_helper_funcs *helper_funcs = NULL;
 514         const struct drm_plane_funcs *funcs;
 515         struct drm_plane *plane;
 516         const u32 *formats;
 517         int num_formats;
 518         int err;
 519
 520         if (type == DRM_PLANE_TYPE_PRIMARY) {
 521                 funcs = &vbox_primary_plane_funcs;
 522                 formats = vbox_primary_plane_formats;
 523                 helper_funcs = &vbox_primary_helper_funcs;
 524                 num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 525         } else if (type == DRM_PLANE_TYPE_CURSOR) {
 526                 funcs = &vbox_cursor_plane_funcs;
 527                 formats = vbox_cursor_plane_formats;
 528                 helper_funcs = &vbox_cursor_helper_funcs;
 529                 num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 530         } else {
 531                 return ERR_PTR(-EINVAL);
 532         }
 533
 534         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 535         if (!plane)
 536                 return ERR_PTR(-ENOMEM);
 537
 538         err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 539                                        funcs, formats, num_formats,
 540                                        NULL, type, NULL);
 541         if (err)
 542                 goto free_plane;
 543
 544         drm_plane_helper_add(plane, helper_funcs);
 545
 546         return plane;
 547
 548 free_plane:
 549         kfree(plane);
 550         return ERR_PTR(-EINVAL);
 551 }
 552
 553 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 554 {
 555         struct vbox_private *vbox =
 556                 container_of(dev, struct vbox_private, ddev);
 557         struct drm_plane *cursor = NULL;
 558         struct vbox_crtc *vbox_crtc;
 559         struct drm_plane *primary;
 560         u32 caps = 0;
 561         int ret;
 562
 563         ret = hgsmi_query_conf(vbox->guest_pool,
 564                                VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 565         if (ret)
 566                 return ERR_PTR(ret);
 567
 568         vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 569         if (!vbox_crtc)
 570                 return ERR_PTR(-ENOMEM);
 571
 572         primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 573         if (IS_ERR(primary)) {
 574                 ret = PTR_ERR(primary);
 575                 goto free_mem;
 576         }
 577
 578         if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 579                 cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 580                 if (IS_ERR(cursor)) {
 581                         ret = PTR_ERR(cursor);
 582                         goto clean_primary;
 583                 }
 584         } else {
 585                 DRM_WARN("VirtualBox host is too old, no cursor support\n");
 586         }
 587
 588         vbox_crtc->crtc_id = i;
 589
 590         ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 591                                         &vbox_crtc_funcs, NULL);
 592         if (ret)
 593                 goto clean_cursor;
 594
 595         drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 596         drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 597
 598         return vbox_crtc;
 599
 600 clean_cursor:
 601         if (cursor) {
 602                 drm_plane_cleanup(cursor);
 603                 kfree(cursor);
 604         }
 605 clean_primary:
 606         drm_plane_cleanup(primary);
 607         kfree(primary);
 608 free_mem:
 609         kfree(vbox_crtc);
 610         return ERR_PTR(ret);
 611 }
 612
 613 static void vbox_encoder_destroy(struct drm_encoder *encoder)
 614 {
 615         drm_encoder_cleanup(encoder);
 616         kfree(encoder);
 617 }
 618
 619 static const struct drm_encoder_funcs vbox_enc_funcs = {
 620         .destroy = vbox_encoder_destroy,
 621 };
 622
 623 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 624                                              unsigned int i)
 625 {
 626         struct vbox_encoder *vbox_encoder;
 627
 628         vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 629         if (!vbox_encoder)
 630                 return NULL;
 631
 632         drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 633                          DRM_MODE_ENCODER_DAC, NULL);
 634
 635         vbox_encoder->base.possible_crtcs = 1 << i;
 636         return &vbox_encoder->base;
 637 }
 638
 639 /*
 640  * Generate EDID data with a mode-unique serial number for the virtual
 641  * monitor to try to persuade Unity that different modes correspond to
 642  * different monitors and it should not try to force the same resolution on
 643  * them.
 644  */
 645 static void vbox_set_edid(struct drm_connector *connector, int width,
 646                           int height)
 647 {
 648         enum { EDID_SIZE = 128 };
 649         unsigned char edid[EDID_SIZE] = {
 650                 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 651                 0x58, 0x58,     /* manufacturer (VBX) */
 652                 0x00, 0x00,     /* product code */
 653                 0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 654                 0x01,           /* week of manufacture */
 655                 0x00,           /* year of manufacture */
 656                 0x01, 0x03,     /* EDID version */
 657                 0x80,           /* capabilities - digital */
 658                 0x00,           /* horiz. res in cm, zero for projectors */
 659                 0x00,           /* vert. res in cm */
 660                 0x78,           /* display gamma (120 == 2.2). */
 661                 0xEE,           /* features (standby, suspend, off, RGB, std */
 662                                 /* colour space, preferred timing mode) */
 663                 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 664                 /* chromaticity for standard colour space. */
 665                 0x00, 0x00, 0x00,       /* no default timings */
 666                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 667                     0x01, 0x01,
 668                 0x01, 0x01, 0x01, 0x01, /* no standard timings */
 669                 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 670                     0x02, 0x02,
 671                 /* descriptor block 1 goes below */
 672                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 673                 /* descriptor block 2, monitor ranges */
 674                 0x00, 0x00, 0x00, 0xFD, 0x00,
 675                 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 676                     0x20, 0x20,
 677                 /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 678                 0x20,
 679                 /* descriptor block 3, monitor name */
 680                 0x00, 0x00, 0x00, 0xFC, 0x00,
 681                 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 682                 '\n',
 683                 /* descriptor block 4: dummy data */
 684                 0x00, 0x00, 0x00, 0x10, 0x00,
 685                 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 686                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 687                 0x20,
 688                 0x00,           /* number of extensions */
 689                 0x00            /* checksum goes here */
 690         };
 691         int clock = (width + 6) * (height + 6) * 60 / 10000;
 692         unsigned int i, sum = 0;
 693
 694         edid[12] = width & 0xff;
 695         edid[13] = width >> 8;
 696         edid[14] = height & 0xff;
 697         edid[15] = height >> 8;
 698         edid[54] = clock & 0xff;
 699         edid[55] = clock >> 8;
 700         edid[56] = width & 0xff;
 701         edid[58] = (width >> 4) & 0xf0;
 702         edid[59] = height & 0xff;
 703         edid[61] = (height >> 4) & 0xf0;
 704         for (i = 0; i < EDID_SIZE - 1; ++i)
 705                 sum += edid[i];
 706         edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 707         drm_connector_update_edid_property(connector, (struct edid *)edid);
 708 }
 709
 710 static int vbox_get_modes(struct drm_connector *connector)
 711 {
 712         struct vbox_connector *vbox_connector = NULL;
 713         struct drm_display_mode *mode = NULL;
 714         struct vbox_private *vbox = NULL;
 715         unsigned int num_modes = 0;
 716         int preferred_width, preferred_height;
 717
 718         vbox_connector = to_vbox_connector(connector);
 719         vbox = connector->dev->dev_private;
 720
 721         hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 722                                     HOST_FLAGS_OFFSET);
 723         if (vbox_connector->vbox_crtc->crtc_id == 0)
 724                 vbox_report_caps(vbox);
 725
 726         num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 727         preferred_width = vbox_connector->mode_hint.width ?
 728                           vbox_connector->mode_hint.width : 1024;
 729         preferred_height = vbox_connector->mode_hint.height ?
 730                            vbox_connector->mode_hint.height : 768;
 731         mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 732                             60, false, false, false);
 733         if (mode) {
 734                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 735                 drm_mode_probed_add(connector, mode);
 736                 ++num_modes;
 737         }
 738         vbox_set_edid(connector, preferred_width, preferred_height);
 739
 740         if (vbox_connector->vbox_crtc->x_hint != -1)
 741                 drm_object_property_set_value(&connector->base,
 742                         vbox->ddev.mode_config.suggested_x_property,
 743                         vbox_connector->vbox_crtc->x_hint);
 744         else
 745                 drm_object_property_set_value(&connector->base,
 746                         vbox->ddev.mode_config.suggested_x_property, 0);
 747
 748         if (vbox_connector->vbox_crtc->y_hint != -1)
 749                 drm_object_property_set_value(&connector->base,
 750                         vbox->ddev.mode_config.suggested_y_property,
 751                         vbox_connector->vbox_crtc->y_hint);
 752         else
 753                 drm_object_property_set_value(&connector->base,
 754                         vbox->ddev.mode_config.suggested_y_property, 0);
 755
 756         return num_modes;
 757 }
 758
 759 static void vbox_connector_destroy(struct drm_connector *connector)
 760 {
 761         drm_connector_unregister(connector);
 762         drm_connector_cleanup(connector);
 763         kfree(connector);
 764 }
 765
 766 static enum drm_connector_status
 767 vbox_connector_detect(struct drm_connector *connector, bool force)
 768 {
 769         struct vbox_connector *vbox_connector;
 770
 771         vbox_connector = to_vbox_connector(connector);
 772
 773         return vbox_connector->mode_hint.disconnected ?
 774             connector_status_disconnected : connector_status_connected;
 775 }
 776
 777 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 778                            u32 max_y)
 779 {
 780         struct vbox_connector *vbox_connector;
 781         struct drm_device *dev;
 782         struct drm_display_mode *mode, *iterator;
 783
 784         vbox_connector = to_vbox_connector(connector);
 785         dev = vbox_connector->base.dev;
 786         list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 787                 list_del(&mode->head);
 788                 drm_mode_destroy(dev, mode);
 789         }
 790
 791         return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 792 }
 793
 794 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 795         .get_modes = vbox_get_modes,
 796 };
 797
 798 static const struct drm_connector_funcs vbox_connector_funcs = {
 799         .detect = vbox_connector_detect,
 800         .fill_modes = vbox_fill_modes,
 801         .destroy = vbox_connector_destroy,
 802         .reset = drm_atomic_helper_connector_reset,
 803         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 804         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 805 };
 806
 807 static int vbox_connector_init(struct drm_device *dev,
 808                                struct vbox_crtc *vbox_crtc,
 809                                struct drm_encoder *encoder)
 810 {
 811         struct vbox_connector *vbox_connector;
 812         struct drm_connector *connector;
 813
 814         vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 815         if (!vbox_connector)
 816                 return -ENOMEM;
 817
 818         connector = &vbox_connector->base;
 819         vbox_connector->vbox_crtc = vbox_crtc;
 820
 821         drm_connector_init(dev, connector, &vbox_connector_funcs,
 822                            DRM_MODE_CONNECTOR_VGA);
 823         drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 824
 825         connector->interlace_allowed = 0;
 826         connector->doublescan_allowed = 0;
 827
 828         drm_mode_create_suggested_offset_properties(dev);
 829         drm_object_attach_property(&connector->base,
 830                                    dev->mode_config.suggested_x_property, 0);
 831         drm_object_attach_property(&connector->base,
 832                                    dev->mode_config.suggested_y_property, 0);
 833
 834         drm_connector_attach_encoder(connector, encoder);
 835
 836         return 0;
 837 }
 838
 839 static const struct drm_mode_config_funcs vbox_mode_funcs = {
 840         .fb_create = drm_gem_fb_create_with_dirty,
 841         .atomic_check = drm_atomic_helper_check,
 842         .atomic_commit = drm_atomic_helper_commit,
 843 };
 844
 845 int vbox_mode_init(struct vbox_private *vbox)
 846 {
 847         struct drm_device *dev = &vbox->ddev;
 848         struct drm_encoder *encoder;
 849         struct vbox_crtc *vbox_crtc;
 850         unsigned int i;
 851         int ret;
 852
 853         drm_mode_config_init(dev);
 854
 855         dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 856         dev->mode_config.min_width = 0;
 857         dev->mode_config.min_height = 0;
 858         dev->mode_config.preferred_depth = 24;
 859         dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 860         dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 861
 862         for (i = 0; i < vbox->num_crtcs; ++i) {
 863                 vbox_crtc = vbox_crtc_init(dev, i);
 864                 if (IS_ERR(vbox_crtc)) {
 865                         ret = PTR_ERR(vbox_crtc);
 866                         goto err_drm_mode_cleanup;
 867                 }
 868                 encoder = vbox_encoder_init(dev, i);
 869                 if (!encoder) {
 870                         ret = -ENOMEM;
 871                         goto err_drm_mode_cleanup;
 872                 }
 873                 ret = vbox_connector_init(dev, vbox_crtc, encoder);
 874                 if (ret)
 875                         goto err_drm_mode_cleanup;
 876         }
 877
 878         drm_mode_config_reset(dev);
 879         return 0;
 880
 881 err_drm_mode_cleanup:
 882         drm_mode_config_cleanup(dev);
 883         return ret;
 884 }
 885
 886 void vbox_mode_fini(struct vbox_private *vbox)
 887 {
 888         drm_mode_config_cleanup(&vbox->ddev);
 889 }