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