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