drivers/gpu/drm/vboxvideo/vbox_mode.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright (C) 2013-2017 Oracle Corporation
   4  * This file is based on ast_mode.c
   5  * Copyright 2012 Red Hat Inc.
   6  * Parts based on xf86-video-ast
   7  * Copyright (c) 2005 ASPEED Technology Inc.
   8  * Authors: Dave Airlie <airlied@redhat.com>
   9  *          Michael Thayer <michael.thayer@oracle.com,
  10  *          Hans de Goede <hdegoede@redhat.com>
  11  */
  12 #include <linux/export.h>
  13
  14 #include <drm/drm_atomic.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_fb_helper.h>
  17 #include <drm/drm_fourcc.h>
  18 #include <drm/drm_plane_helper.h>
  19 #include <drm/drm_probe_helper.h>
  20 #include <drm/drm_vblank.h>
  21
  22 #include "hgsmi_channels.h"
  23 #include "vbox_drv.h"
  24 #include "vboxvideo.h"
  25
  26 /*
  27  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
  28  * mode set and tell the host we support advanced graphics functions.
  29  */
  30 static void vbox_do_modeset(struct drm_crtc *crtc)
  31 {
  32         struct drm_framebuffer *fb = crtc->primary->state->fb;
  33         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  34         struct vbox_private *vbox;
  35         int width, height, bpp, pitch;
  36         u16 flags;
  37         s32 x_offset, y_offset;
  38
  39         vbox = crtc->dev->dev_private;
  40         width = vbox_crtc->width ? vbox_crtc->width : 640;
  41         height = vbox_crtc->height ? vbox_crtc->height : 480;
  42         bpp = fb ? fb->format->cpp[0] * 8 : 32;
  43         pitch = fb ? fb->pitches[0] : width * bpp / 8;
  44         x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
  45         y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
  46
  47         /*
  48          * This is the old way of setting graphics modes.  It assumed one screen
  49          * and a frame-buffer at the start of video RAM.  On older versions of
  50          * VirtualBox, certain parts of the code still assume that the first
  51          * screen is programmed this way, so try to fake it.
  52          */
  53         if (vbox_crtc->crtc_id == 0 && fb &&
  54             vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
  55             vbox_crtc->fb_offset % (bpp / 8) == 0) {
  56                 vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
  57                 vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
  58                 vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
  59                 vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
  60                 vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
  61                 vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
  62                         vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
  63                 vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
  64                                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
  65         }
  66
  67         flags = VBVA_SCREEN_F_ACTIVE;
  68         flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
  69         flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
  70         hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
  71                                    x_offset, y_offset,
  72                                    vbox_crtc->x * bpp / 8 +
  73                                                         vbox_crtc->y * pitch,
  74                                    pitch, width, height, bpp, flags);
  75 }
  76
  77 static int vbox_set_view(struct drm_crtc *crtc)
  78 {
  79         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
  80         struct vbox_private *vbox = crtc->dev->dev_private;
  81         struct vbva_infoview *p;
  82
  83         /*
  84          * Tell the host about the view.  This design originally targeted the
  85          * Windows XP driver architecture and assumed that each screen would
  86          * have a dedicated frame buffer with the command buffer following it,
  87          * the whole being a "view".  The host works out which screen a command
  88          * buffer belongs to by checking whether it is in the first view, then
  89          * whether it is in the second and so on.  The first match wins.  We
  90          * cheat around this by making the first view be the managed memory
  91          * plus the first command buffer, the second the same plus the second
  92          * buffer and so on.
  93          */
  94         p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
  95                                HGSMI_CH_VBVA, VBVA_INFO_VIEW);
  96         if (!p)
  97                 return -ENOMEM;
  98
  99         p->view_index = vbox_crtc->crtc_id;
 100         p->view_offset = vbox_crtc->fb_offset;
 101         p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
 102                        vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
 103         p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
 104
 105         hgsmi_buffer_submit(vbox->guest_pool, p);
 106         hgsmi_buffer_free(vbox->guest_pool, p);
 107
 108         return 0;
 109 }
 110
 111 /*
 112  * Try to map the layout of virtual screens to the range of the input device.
 113  * Return true if we need to re-set the crtc modes due to screen offset
 114  * changes.
 115  */
 116 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
 117 {
 118         struct drm_crtc *crtci;
 119         struct drm_connector *connectori;
 120         struct drm_framebuffer *fb, *fb1 = NULL;
 121         bool single_framebuffer = true;
 122         bool old_single_framebuffer = vbox->single_framebuffer;
 123         u16 width = 0, height = 0;
 124
 125         /*
 126          * Are we using an X.Org-style single large frame-buffer for all crtcs?
 127          * If so then screen layout can be deduced from the crtc offsets.
 128          * Same fall-back if this is the fbdev frame-buffer.
 129          */
 130         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 131                 fb = crtci->primary->state->fb;
 132                 if (!fb)
 133                         continue;
 134
 135                 if (!fb1) {
 136                         fb1 = fb;
 137                         if (fb1 == vbox->ddev.fb_helper->fb)
 138                                 break;
 139                 } else if (fb != fb1) {
 140                         single_framebuffer = false;
 141                 }
 142         }
 143         if (!fb1)
 144                 return false;
 145
 146         if (single_framebuffer) {
 147                 vbox->single_framebuffer = true;
 148                 vbox->input_mapping_width = fb1->width;
 149                 vbox->input_mapping_height = fb1->height;
 150                 return old_single_framebuffer != vbox->single_framebuffer;
 151         }
 152         /* Otherwise calculate the total span of all screens. */
 153         list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
 154                             head) {
 155                 struct vbox_connector *vbox_connector =
 156                     to_vbox_connector(connectori);
 157                 struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
 158
 159                 width = max_t(u16, width, vbox_crtc->x_hint +
 160                                           vbox_connector->mode_hint.width);
 161                 height = max_t(u16, height, vbox_crtc->y_hint +
 162                                             vbox_connector->mode_hint.height);
 163         }
 164
 165         vbox->single_framebuffer = false;
 166         vbox->input_mapping_width = width;
 167         vbox->input_mapping_height = height;
 168
 169         return old_single_framebuffer != vbox->single_framebuffer;
 170 }
 171
 172 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 173                                         struct drm_framebuffer *fb,
 174                                         int x, int y)
 175 {
 176         struct drm_gem_vram_object *gbo =
 177                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 178         struct vbox_private *vbox = crtc->dev->dev_private;
 179         struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
 180         bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
 181
 182         mutex_lock(&vbox->hw_mutex);
 183
 184         if (crtc->state->enable) {
 185                 vbox_crtc->width = crtc->state->mode.hdisplay;
 186                 vbox_crtc->height = crtc->state->mode.vdisplay;
 187         }
 188
 189         vbox_crtc->x = x;
 190         vbox_crtc->y = y;
 191         vbox_crtc->fb_offset = drm_gem_vram_offset(gbo);
 192
 193         /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
 194         if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
 195                 struct drm_crtc *crtci;
 196
 197                 list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
 198                                     head) {
 199                         if (crtci == crtc)
 200                                 continue;
 201                         vbox_do_modeset(crtci);
 202                 }
 203         }
 204
 205         vbox_set_view(crtc);
 206         vbox_do_modeset(crtc);
 207
 208         if (needs_modeset)
 209                 hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
 210                                            vbox->input_mapping_width,
 211                                            vbox->input_mapping_height);
 212
 213         mutex_unlock(&vbox->hw_mutex);
 214 }
 215
 216 static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
 217                                     struct drm_crtc_state *old_crtc_state)
 218 {
 219 }
 220
 221 static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
 222                                      struct drm_crtc_state *old_crtc_state)
 223 {
 224 }
 225
 226 static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
 227                                    struct drm_crtc_state *old_crtc_state)
 228 {
 229         struct drm_pending_vblank_event *event;
 230         unsigned long flags;
 231
 232         if (crtc->state && crtc->state->event) {
 233                 event = crtc->state->event;
 234                 crtc->state->event = NULL;
 235
 236                 spin_lock_irqsave(&crtc->dev->event_lock, flags);
 237                 drm_crtc_send_vblank_event(crtc, event);
 238                 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 239         }
 240 }
 241
 242 static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
 243         .atomic_enable = vbox_crtc_atomic_enable,
 244         .atomic_disable = vbox_crtc_atomic_disable,
 245         .atomic_flush = vbox_crtc_atomic_flush,
 246 };
 247
 248 static void vbox_crtc_destroy(struct drm_crtc *crtc)
 249 {
 250         drm_crtc_cleanup(crtc);
 251         kfree(crtc);
 252 }
 253
 254 static const struct drm_crtc_funcs vbox_crtc_funcs = {
 255         .set_config = drm_atomic_helper_set_config,
 256         .page_flip = drm_atomic_helper_page_flip,
 257         /* .gamma_set = vbox_crtc_gamma_set, */
 258         .destroy = vbox_crtc_destroy,
 259         .reset = drm_atomic_helper_crtc_reset,
 260         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 261         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 262 };
 263
 264 static int vbox_primary_atomic_check(struct drm_plane *plane,
 265                                      struct drm_plane_state *new_state)
 266 {
 267         struct drm_crtc_state *crtc_state = NULL;
 268
 269         if (new_state->crtc) {
 270                 crtc_state = drm_atomic_get_existing_crtc_state(
 271                                             new_state->state, new_state->crtc);
 272                 if (WARN_ON(!crtc_state))
 273                         return -EINVAL;
 274         }
 275
 276         return drm_atomic_helper_check_plane_state(new_state, crtc_state,
 277                                                    DRM_PLANE_HELPER_NO_SCALING,
 278                                                    DRM_PLANE_HELPER_NO_SCALING,
 279                                                    false, true);
 280 }
 281
 282 static void vbox_primary_atomic_update(struct drm_plane *plane,
 283                                        struct drm_plane_state *old_state)
 284 {
 285         struct drm_crtc *crtc = plane->state->crtc;
 286         struct drm_framebuffer *fb = plane->state->fb;
 287         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_primary_prepare_fb(struct drm_plane *plane,
 338                                    struct drm_plane_state *new_state)
 339 {
 340         struct drm_gem_vram_object *gbo;
 341         int ret;
 342
 343         if (!new_state->fb)
 344                 return 0;
 345
 346         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 347         ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
 348         if (ret)
 349                 DRM_WARN("Error %d pinning new fb, out of video mem?\n", ret);
 350
 351         return ret;
 352 }
 353
 354 static void vbox_primary_cleanup_fb(struct drm_plane *plane,
 355                                     struct drm_plane_state *old_state)
 356 {
 357         struct drm_gem_vram_object *gbo;
 358
 359         if (!old_state->fb)
 360                 return;
 361
 362         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(old_state->fb)->obj);
 363         drm_gem_vram_unpin(gbo);
 364 }
 365
 366 static int vbox_cursor_atomic_check(struct drm_plane *plane,
 367                                     struct drm_plane_state *new_state)
 368 {
 369         struct drm_crtc_state *crtc_state = NULL;
 370         u32 width = new_state->crtc_w;
 371         u32 height = new_state->crtc_h;
 372         int ret;
 373
 374         if (new_state->crtc) {
 375                 crtc_state = drm_atomic_get_existing_crtc_state(
 376                                             new_state->state, new_state->crtc);
 377                 if (WARN_ON(!crtc_state))
 378                         return -EINVAL;
 379         }
 380
 381         ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
 382                                                   DRM_PLANE_HELPER_NO_SCALING,
 383                                                   DRM_PLANE_HELPER_NO_SCALING,
 384                                                   true, true);
 385         if (ret)
 386                 return ret;
 387
 388         if (!new_state->fb)
 389                 return 0;
 390
 391         if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
 392             width == 0 || height == 0)
 393                 return -EINVAL;
 394
 395         return 0;
 396 }
 397
 398 /*
 399  * Copy the ARGB image and generate the mask, which is needed in case the host
 400  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
 401  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
 402  */
 403 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
 404                               size_t mask_size)
 405 {
 406         size_t line_size = (width + 7) / 8;
 407         u32 i, j;
 408
 409         memcpy(dst + mask_size, src, width * height * 4);
 410         for (i = 0; i < height; ++i)
 411                 for (j = 0; j < width; ++j)
 412                         if (((u32 *)src)[i * width + j] > 0xf0000000)
 413                                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
 414 }
 415
 416 static void vbox_cursor_atomic_update(struct drm_plane *plane,
 417                                       struct drm_plane_state *old_state)
 418 {
 419         struct vbox_private *vbox =
 420                 container_of(plane->dev, struct vbox_private, ddev);
 421         struct vbox_crtc *vbox_crtc = to_vbox_crtc(plane->state->crtc);
 422         struct drm_framebuffer *fb = plane->state->fb;
 423         struct drm_gem_vram_object *gbo =
 424                 drm_gem_vram_of_gem(to_vbox_framebuffer(fb)->obj);
 425         u32 width = plane->state->crtc_w;
 426         u32 height = plane->state->crtc_h;
 427         size_t data_size, mask_size;
 428         u32 flags;
 429         u8 *src;
 430
 431         /*
 432          * VirtualBox uses the host windowing system to draw the cursor so
 433          * moves are a no-op, we only need to upload new cursor sprites.
 434          */
 435         if (fb == old_state->fb)
 436                 return;
 437
 438         mutex_lock(&vbox->hw_mutex);
 439
 440         vbox_crtc->cursor_enabled = true;
 441
 442         /* pinning is done in prepare/cleanup framebuffer */
 443         src = drm_gem_vram_kmap(gbo, true, NULL);
 444         if (IS_ERR(src)) {
 445                 mutex_unlock(&vbox->hw_mutex);
 446                 DRM_WARN("Could not kmap cursor bo, skipping update\n");
 447                 return;
 448         }
 449
 450         /*
 451          * The mask must be calculated based on the alpha
 452          * channel, one bit per ARGB word, and must be 32-bit
 453          * padded.
 454          */
 455         mask_size = ((width + 7) / 8 * height + 3) & ~3;
 456         data_size = width * height * 4 + mask_size;
 457
 458         copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
 459         drm_gem_vram_kunmap(gbo);
 460
 461         flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
 462                 VBOX_MOUSE_POINTER_ALPHA;
 463         hgsmi_update_pointer_shape(vbox->guest_pool, flags,
 464                                    min_t(u32, max(fb->hot_x, 0), width),
 465                                    min_t(u32, max(fb->hot_y, 0), height),
 466                                    width, height, vbox->cursor_data, data_size);
 467
 468         mutex_unlock(&vbox->hw_mutex);
 469 }
 470
 471 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
 472                                        struct drm_plane_state *old_state)
 473 {
 474         struct vbox_private *vbox =
 475                 container_of(plane->dev, struct vbox_private, ddev);
 476         struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
 477         bool cursor_enabled = false;
 478         struct drm_crtc *crtci;
 479
 480         mutex_lock(&vbox->hw_mutex);
 481
 482         vbox_crtc->cursor_enabled = false;
 483
 484         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
 485                 if (to_vbox_crtc(crtci)->cursor_enabled)
 486                         cursor_enabled = true;
 487         }
 488
 489         if (!cursor_enabled)
 490                 hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
 491                                            0, 0, NULL, 0);
 492
 493         mutex_unlock(&vbox->hw_mutex);
 494 }
 495
 496 static int vbox_cursor_prepare_fb(struct drm_plane *plane,
 497                                   struct drm_plane_state *new_state)
 498 {
 499         struct drm_gem_vram_object *gbo;
 500
 501         if (!new_state->fb)
 502                 return 0;
 503
 504         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(new_state->fb)->obj);
 505         return drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_SYSTEM);
 506 }
 507
 508 static void vbox_cursor_cleanup_fb(struct drm_plane *plane,
 509                                    struct drm_plane_state *old_state)
 510 {
 511         struct drm_gem_vram_object *gbo;
 512
 513         if (!plane->state->fb)
 514                 return;
 515
 516         gbo = drm_gem_vram_of_gem(to_vbox_framebuffer(plane->state->fb)->obj);
 517         drm_gem_vram_unpin(gbo);
 518 }
 519
 520 static const u32 vbox_cursor_plane_formats[] = {
 521         DRM_FORMAT_ARGB8888,
 522 };
 523
 524 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
 525         .atomic_check   = vbox_cursor_atomic_check,
 526         .atomic_update  = vbox_cursor_atomic_update,
 527         .atomic_disable = vbox_cursor_atomic_disable,
 528         .prepare_fb     = vbox_cursor_prepare_fb,
 529         .cleanup_fb     = vbox_cursor_cleanup_fb,
 530 };
 531
 532 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
 533         .update_plane   = drm_atomic_helper_update_plane,
 534         .disable_plane  = drm_atomic_helper_disable_plane,
 535         .destroy        = drm_primary_helper_destroy,
 536         .reset          = drm_atomic_helper_plane_reset,
 537         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 538         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 539 };
 540
 541 static const u32 vbox_primary_plane_formats[] = {
 542         DRM_FORMAT_XRGB8888,
 543         DRM_FORMAT_ARGB8888,
 544 };
 545
 546 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 547         .atomic_check = vbox_primary_atomic_check,
 548         .atomic_update = vbox_primary_atomic_update,
 549         .atomic_disable = vbox_primary_atomic_disable,
 550         .prepare_fb = vbox_primary_prepare_fb,
 551         .cleanup_fb = vbox_primary_cleanup_fb,
 552 };
 553
 554 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 555         .update_plane   = drm_atomic_helper_update_plane,
 556         .disable_plane  = drm_atomic_helper_disable_plane,
 557         .destroy        = drm_primary_helper_destroy,
 558         .reset          = drm_atomic_helper_plane_reset,
 559         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 560         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 561 };
 562
 563 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 564                                            unsigned int possible_crtcs,
 565                                            enum drm_plane_type type)
 566 {
 567         const struct drm_plane_helper_funcs *helper_funcs = NULL;
 568         const struct drm_plane_funcs *funcs;
 569         struct drm_plane *plane;
 570         const u32 *formats;
 571         int num_formats;
 572         int err;
 573
 574         if (type == DRM_PLANE_TYPE_PRIMARY) {
 575                 funcs = &vbox_primary_plane_funcs;
 576                 formats = vbox_primary_plane_formats;
 577                 helper_funcs = &vbox_primary_helper_funcs;
 578                 num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 579         } else if (type == DRM_PLANE_TYPE_CURSOR) {
 580                 funcs = &vbox_cursor_plane_funcs;
 581                 formats = vbox_cursor_plane_formats;
 582                 helper_funcs = &vbox_cursor_helper_funcs;
 583                 num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 584         } else {
 585                 return ERR_PTR(-EINVAL);
 586         }
 587
 588         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 589         if (!plane)
 590                 return ERR_PTR(-ENOMEM);
 591
 592         err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 593                                        funcs, formats, num_formats,
 594                                        NULL, type, NULL);
 595         if (err)
 596                 goto free_plane;
 597
 598         drm_plane_helper_add(plane, helper_funcs);
 599
 600         return plane;
 601
 602 free_plane:
 603         kfree(plane);
 604         return ERR_PTR(-EINVAL);
 605 }
 606
 607 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 608 {
 609         struct vbox_private *vbox =
 610                 container_of(dev, struct vbox_private, ddev);
 611         struct drm_plane *cursor = NULL;
 612         struct vbox_crtc *vbox_crtc;
 613         struct drm_plane *primary;
 614         u32 caps = 0;
 615         int ret;
 616
 617         ret = hgsmi_query_conf(vbox->guest_pool,
 618                                VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 619         if (ret)
 620                 return ERR_PTR(ret);
 621
 622         vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 623         if (!vbox_crtc)
 624                 return ERR_PTR(-ENOMEM);
 625
 626         primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 627         if (IS_ERR(primary)) {
 628                 ret = PTR_ERR(primary);
 629                 goto free_mem;
 630         }
 631
 632         if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 633                 cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 634                 if (IS_ERR(cursor)) {
 635                         ret = PTR_ERR(cursor);
 636                         goto clean_primary;
 637                 }
 638         } else {
 639                 DRM_WARN("VirtualBox host is too old, no cursor support\n");
 640         }
 641
 642         vbox_crtc->crtc_id = i;
 643
 644         ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 645                                         &vbox_crtc_funcs, NULL);
 646         if (ret)
 647                 goto clean_cursor;
 648
 649         drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 650         drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 651
 652         return vbox_crtc;
 653
 654 clean_cursor:
 655         if (cursor) {
 656                 drm_plane_cleanup(cursor);
 657                 kfree(cursor);
 658         }
 659 clean_primary:
 660         drm_plane_cleanup(primary);
 661         kfree(primary);
 662 free_mem:
 663         kfree(vbox_crtc);
 664         return ERR_PTR(ret);
 665 }
 666
 667 static void vbox_encoder_destroy(struct drm_encoder *encoder)
 668 {
 669         drm_encoder_cleanup(encoder);
 670         kfree(encoder);
 671 }
 672
 673 static const struct drm_encoder_funcs vbox_enc_funcs = {
 674         .destroy = vbox_encoder_destroy,
 675 };
 676
 677 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 678                                              unsigned int i)
 679 {
 680         struct vbox_encoder *vbox_encoder;
 681
 682         vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 683         if (!vbox_encoder)
 684                 return NULL;
 685
 686         drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 687                          DRM_MODE_ENCODER_DAC, NULL);
 688
 689         vbox_encoder->base.possible_crtcs = 1 << i;
 690         return &vbox_encoder->base;
 691 }
 692
 693 /*
 694  * Generate EDID data with a mode-unique serial number for the virtual
 695  * monitor to try to persuade Unity that different modes correspond to
 696  * different monitors and it should not try to force the same resolution on
 697  * them.
 698  */
 699 static void vbox_set_edid(struct drm_connector *connector, int width,
 700                           int height)
 701 {
 702         enum { EDID_SIZE = 128 };
 703         unsigned char edid[EDID_SIZE] = {
 704                 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 705                 0x58, 0x58,     /* manufacturer (VBX) */
 706                 0x00, 0x00,     /* product code */
 707                 0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 708                 0x01,           /* week of manufacture */
 709                 0x00,           /* year of manufacture */
 710                 0x01, 0x03,     /* EDID version */
 711                 0x80,           /* capabilities - digital */
 712                 0x00,           /* horiz. res in cm, zero for projectors */
 713                 0x00,           /* vert. res in cm */
 714                 0x78,           /* display gamma (120 == 2.2). */
 715                 0xEE,           /* features (standby, suspend, off, RGB, std */
 716                                 /* colour space, preferred timing mode) */
 717                 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 718                 /* chromaticity for standard colour space. */
 719                 0x00, 0x00, 0x00,       /* no default timings */
 720                 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 721                     0x01, 0x01,
 722                 0x01, 0x01, 0x01, 0x01, /* no standard timings */
 723                 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 724                     0x02, 0x02,
 725                 /* descriptor block 1 goes below */
 726                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 727                 /* descriptor block 2, monitor ranges */
 728                 0x00, 0x00, 0x00, 0xFD, 0x00,
 729                 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 730                     0x20, 0x20,
 731                 /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 732                 0x20,
 733                 /* descriptor block 3, monitor name */
 734                 0x00, 0x00, 0x00, 0xFC, 0x00,
 735                 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 736                 '\n',
 737                 /* descriptor block 4: dummy data */
 738                 0x00, 0x00, 0x00, 0x10, 0x00,
 739                 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 740                 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 741                 0x20,
 742                 0x00,           /* number of extensions */
 743                 0x00            /* checksum goes here */
 744         };
 745         int clock = (width + 6) * (height + 6) * 60 / 10000;
 746         unsigned int i, sum = 0;
 747
 748         edid[12] = width & 0xff;
 749         edid[13] = width >> 8;
 750         edid[14] = height & 0xff;
 751         edid[15] = height >> 8;
 752         edid[54] = clock & 0xff;
 753         edid[55] = clock >> 8;
 754         edid[56] = width & 0xff;
 755         edid[58] = (width >> 4) & 0xf0;
 756         edid[59] = height & 0xff;
 757         edid[61] = (height >> 4) & 0xf0;
 758         for (i = 0; i < EDID_SIZE - 1; ++i)
 759                 sum += edid[i];
 760         edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 761         drm_connector_update_edid_property(connector, (struct edid *)edid);
 762 }
 763
 764 static int vbox_get_modes(struct drm_connector *connector)
 765 {
 766         struct vbox_connector *vbox_connector = NULL;
 767         struct drm_display_mode *mode = NULL;
 768         struct vbox_private *vbox = NULL;
 769         unsigned int num_modes = 0;
 770         int preferred_width, preferred_height;
 771
 772         vbox_connector = to_vbox_connector(connector);
 773         vbox = connector->dev->dev_private;
 774
 775         hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 776                                     HOST_FLAGS_OFFSET);
 777         if (vbox_connector->vbox_crtc->crtc_id == 0)
 778                 vbox_report_caps(vbox);
 779
 780         num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 781         preferred_width = vbox_connector->mode_hint.width ?
 782                           vbox_connector->mode_hint.width : 1024;
 783         preferred_height = vbox_connector->mode_hint.height ?
 784                            vbox_connector->mode_hint.height : 768;
 785         mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 786                             60, false, false, false);
 787         if (mode) {
 788                 mode->type |= DRM_MODE_TYPE_PREFERRED;
 789                 drm_mode_probed_add(connector, mode);
 790                 ++num_modes;
 791         }
 792         vbox_set_edid(connector, preferred_width, preferred_height);
 793
 794         if (vbox_connector->vbox_crtc->x_hint != -1)
 795                 drm_object_property_set_value(&connector->base,
 796                         vbox->ddev.mode_config.suggested_x_property,
 797                         vbox_connector->vbox_crtc->x_hint);
 798         else
 799                 drm_object_property_set_value(&connector->base,
 800                         vbox->ddev.mode_config.suggested_x_property, 0);
 801
 802         if (vbox_connector->vbox_crtc->y_hint != -1)
 803                 drm_object_property_set_value(&connector->base,
 804                         vbox->ddev.mode_config.suggested_y_property,
 805                         vbox_connector->vbox_crtc->y_hint);
 806         else
 807                 drm_object_property_set_value(&connector->base,
 808                         vbox->ddev.mode_config.suggested_y_property, 0);
 809
 810         return num_modes;
 811 }
 812
 813 static void vbox_connector_destroy(struct drm_connector *connector)
 814 {
 815         drm_connector_unregister(connector);
 816         drm_connector_cleanup(connector);
 817         kfree(connector);
 818 }
 819
 820 static enum drm_connector_status
 821 vbox_connector_detect(struct drm_connector *connector, bool force)
 822 {
 823         struct vbox_connector *vbox_connector;
 824
 825         vbox_connector = to_vbox_connector(connector);
 826
 827         return vbox_connector->mode_hint.disconnected ?
 828             connector_status_disconnected : connector_status_connected;
 829 }
 830
 831 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 832                            u32 max_y)
 833 {
 834         struct vbox_connector *vbox_connector;
 835         struct drm_device *dev;
 836         struct drm_display_mode *mode, *iterator;
 837
 838         vbox_connector = to_vbox_connector(connector);
 839         dev = vbox_connector->base.dev;
 840         list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 841                 list_del(&mode->head);
 842                 drm_mode_destroy(dev, mode);
 843         }
 844
 845         return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 846 }
 847
 848 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 849         .get_modes = vbox_get_modes,
 850 };
 851
 852 static const struct drm_connector_funcs vbox_connector_funcs = {
 853         .detect = vbox_connector_detect,
 854         .fill_modes = vbox_fill_modes,
 855         .destroy = vbox_connector_destroy,
 856         .reset = drm_atomic_helper_connector_reset,
 857         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 858         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 859 };
 860
 861 static int vbox_connector_init(struct drm_device *dev,
 862                                struct vbox_crtc *vbox_crtc,
 863                                struct drm_encoder *encoder)
 864 {
 865         struct vbox_connector *vbox_connector;
 866         struct drm_connector *connector;
 867
 868         vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 869         if (!vbox_connector)
 870                 return -ENOMEM;
 871
 872         connector = &vbox_connector->base;
 873         vbox_connector->vbox_crtc = vbox_crtc;
 874
 875         drm_connector_init(dev, connector, &vbox_connector_funcs,
 876                            DRM_MODE_CONNECTOR_VGA);
 877         drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 878
 879         connector->interlace_allowed = 0;
 880         connector->doublescan_allowed = 0;
 881
 882         drm_mode_create_suggested_offset_properties(dev);
 883         drm_object_attach_property(&connector->base,
 884                                    dev->mode_config.suggested_x_property, 0);
 885         drm_object_attach_property(&connector->base,
 886                                    dev->mode_config.suggested_y_property, 0);
 887
 888         drm_connector_attach_encoder(connector, encoder);
 889
 890         return 0;
 891 }
 892
 893 static struct drm_framebuffer *vbox_user_framebuffer_create(
 894                 struct drm_device *dev,
 895                 struct drm_file *filp,
 896                 const struct drm_mode_fb_cmd2 *mode_cmd)
 897 {
 898         struct vbox_private *vbox =
 899                 container_of(dev, struct vbox_private, ddev);
 900         struct drm_gem_object *obj;
 901         struct vbox_framebuffer *vbox_fb;
 902         int ret = -ENOMEM;
 903
 904         obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
 905         if (!obj)
 906                 return ERR_PTR(-ENOENT);
 907
 908         vbox_fb = kzalloc(sizeof(*vbox_fb), GFP_KERNEL);
 909         if (!vbox_fb)
 910                 goto err_unref_obj;
 911
 912         ret = vbox_framebuffer_init(vbox, vbox_fb, mode_cmd, obj);
 913         if (ret)
 914                 goto err_free_vbox_fb;
 915
 916         return &vbox_fb->base;
 917
 918 err_free_vbox_fb:
 919         kfree(vbox_fb);
 920 err_unref_obj:
 921         drm_gem_object_put_unlocked(obj);
 922         return ERR_PTR(ret);
 923 }
 924
 925 static const struct drm_mode_config_funcs vbox_mode_funcs = {
 926         .fb_create = vbox_user_framebuffer_create,
 927         .atomic_check = drm_atomic_helper_check,
 928         .atomic_commit = drm_atomic_helper_commit,
 929 };
 930
 931 int vbox_mode_init(struct vbox_private *vbox)
 932 {
 933         struct drm_device *dev = &vbox->ddev;
 934         struct drm_encoder *encoder;
 935         struct vbox_crtc *vbox_crtc;
 936         unsigned int i;
 937         int ret;
 938
 939         drm_mode_config_init(dev);
 940
 941         dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 942         dev->mode_config.min_width = 0;
 943         dev->mode_config.min_height = 0;
 944         dev->mode_config.preferred_depth = 24;
 945         dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 946         dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 947
 948         for (i = 0; i < vbox->num_crtcs; ++i) {
 949                 vbox_crtc = vbox_crtc_init(dev, i);
 950                 if (IS_ERR(vbox_crtc)) {
 951                         ret = PTR_ERR(vbox_crtc);
 952                         goto err_drm_mode_cleanup;
 953                 }
 954                 encoder = vbox_encoder_init(dev, i);
 955                 if (!encoder) {
 956                         ret = -ENOMEM;
 957                         goto err_drm_mode_cleanup;
 958                 }
 959                 ret = vbox_connector_init(dev, vbox_crtc, encoder);
 960                 if (ret)
 961                         goto err_drm_mode_cleanup;
 962         }
 963
 964         drm_mode_config_reset(dev);
 965         return 0;
 966
 967 err_drm_mode_cleanup:
 968         drm_mode_config_cleanup(dev);
 969         return ret;
 970 }
 971
 972 void vbox_mode_fini(struct vbox_private *vbox)
 973 {
 974         drm_mode_config_cleanup(&vbox->ddev);
 975 }