linux/drivers/gpu/drm/vboxvideo/vbox_mode.c
<<
>>
Prefs
   1// SPDX-License-Identifier: MIT
   2/*
   3 * Copyright (C) 2013-2017 Oracle Corporation
   4 * This file is based on ast_mode.c
   5 * Copyright 2012 Red Hat Inc.
   6 * Parts based on xf86-video-ast
   7 * Copyright (c) 2005 ASPEED Technology Inc.
   8 * Authors: Dave Airlie <airlied@redhat.com>
   9 *          Michael Thayer <michael.thayer@oracle.com,
  10 *          Hans de Goede <hdegoede@redhat.com>
  11 */
  12
  13#include <linux/dma-buf-map.h>
  14#include <linux/export.h>
  15
  16#include <drm/drm_atomic.h>
  17#include <drm/drm_atomic_helper.h>
  18#include <drm/drm_fb_helper.h>
  19#include <drm/drm_fourcc.h>
  20#include <drm/drm_gem_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 */
  33static 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
  80static 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 */
 119static 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
 175static 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
 218static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
 219                                    struct drm_atomic_state *state)
 220{
 221}
 222
 223static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
 224                                     struct drm_atomic_state *state)
 225{
 226}
 227
 228static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
 229                                   struct drm_atomic_state *state)
 230{
 231}
 232
 233static 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
 239static void vbox_crtc_destroy(struct drm_crtc *crtc)
 240{
 241        drm_crtc_cleanup(crtc);
 242        kfree(crtc);
 243}
 244
 245static 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
 255static 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
 275static 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
 321static 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
 334static 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 */
 373static 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
 386static 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 dma_buf_map map = shadow_plane_state->map[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
 437static 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
 464static const u32 vbox_cursor_plane_formats[] = {
 465        DRM_FORMAT_ARGB8888,
 466};
 467
 468static 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
 475static 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
 482static const u32 vbox_primary_plane_formats[] = {
 483        DRM_FORMAT_XRGB8888,
 484        DRM_FORMAT_ARGB8888,
 485};
 486
 487static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
 488        .atomic_check = vbox_primary_atomic_check,
 489        .atomic_update = vbox_primary_atomic_update,
 490        .atomic_disable = vbox_primary_atomic_disable,
 491        .prepare_fb     = drm_gem_vram_plane_helper_prepare_fb,
 492        .cleanup_fb     = drm_gem_vram_plane_helper_cleanup_fb,
 493};
 494
 495static const struct drm_plane_funcs vbox_primary_plane_funcs = {
 496        .update_plane   = drm_atomic_helper_update_plane,
 497        .disable_plane  = drm_atomic_helper_disable_plane,
 498        .destroy        = drm_primary_helper_destroy,
 499        .reset          = drm_atomic_helper_plane_reset,
 500        .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 501        .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 502};
 503
 504static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
 505                                           unsigned int possible_crtcs,
 506                                           enum drm_plane_type type)
 507{
 508        const struct drm_plane_helper_funcs *helper_funcs = NULL;
 509        const struct drm_plane_funcs *funcs;
 510        struct drm_plane *plane;
 511        const u32 *formats;
 512        int num_formats;
 513        int err;
 514
 515        if (type == DRM_PLANE_TYPE_PRIMARY) {
 516                funcs = &vbox_primary_plane_funcs;
 517                formats = vbox_primary_plane_formats;
 518                helper_funcs = &vbox_primary_helper_funcs;
 519                num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
 520        } else if (type == DRM_PLANE_TYPE_CURSOR) {
 521                funcs = &vbox_cursor_plane_funcs;
 522                formats = vbox_cursor_plane_formats;
 523                helper_funcs = &vbox_cursor_helper_funcs;
 524                num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
 525        } else {
 526                return ERR_PTR(-EINVAL);
 527        }
 528
 529        plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 530        if (!plane)
 531                return ERR_PTR(-ENOMEM);
 532
 533        err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
 534                                       funcs, formats, num_formats,
 535                                       NULL, type, NULL);
 536        if (err)
 537                goto free_plane;
 538
 539        drm_plane_helper_add(plane, helper_funcs);
 540
 541        return plane;
 542
 543free_plane:
 544        kfree(plane);
 545        return ERR_PTR(-EINVAL);
 546}
 547
 548static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
 549{
 550        struct vbox_private *vbox =
 551                container_of(dev, struct vbox_private, ddev);
 552        struct drm_plane *cursor = NULL;
 553        struct vbox_crtc *vbox_crtc;
 554        struct drm_plane *primary;
 555        u32 caps = 0;
 556        int ret;
 557
 558        ret = hgsmi_query_conf(vbox->guest_pool,
 559                               VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
 560        if (ret)
 561                return ERR_PTR(ret);
 562
 563        vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
 564        if (!vbox_crtc)
 565                return ERR_PTR(-ENOMEM);
 566
 567        primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
 568        if (IS_ERR(primary)) {
 569                ret = PTR_ERR(primary);
 570                goto free_mem;
 571        }
 572
 573        if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
 574                cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
 575                if (IS_ERR(cursor)) {
 576                        ret = PTR_ERR(cursor);
 577                        goto clean_primary;
 578                }
 579        } else {
 580                DRM_WARN("VirtualBox host is too old, no cursor support\n");
 581        }
 582
 583        vbox_crtc->crtc_id = i;
 584
 585        ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
 586                                        &vbox_crtc_funcs, NULL);
 587        if (ret)
 588                goto clean_cursor;
 589
 590        drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
 591        drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
 592
 593        return vbox_crtc;
 594
 595clean_cursor:
 596        if (cursor) {
 597                drm_plane_cleanup(cursor);
 598                kfree(cursor);
 599        }
 600clean_primary:
 601        drm_plane_cleanup(primary);
 602        kfree(primary);
 603free_mem:
 604        kfree(vbox_crtc);
 605        return ERR_PTR(ret);
 606}
 607
 608static void vbox_encoder_destroy(struct drm_encoder *encoder)
 609{
 610        drm_encoder_cleanup(encoder);
 611        kfree(encoder);
 612}
 613
 614static const struct drm_encoder_funcs vbox_enc_funcs = {
 615        .destroy = vbox_encoder_destroy,
 616};
 617
 618static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
 619                                             unsigned int i)
 620{
 621        struct vbox_encoder *vbox_encoder;
 622
 623        vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
 624        if (!vbox_encoder)
 625                return NULL;
 626
 627        drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
 628                         DRM_MODE_ENCODER_DAC, NULL);
 629
 630        vbox_encoder->base.possible_crtcs = 1 << i;
 631        return &vbox_encoder->base;
 632}
 633
 634/*
 635 * Generate EDID data with a mode-unique serial number for the virtual
 636 * monitor to try to persuade Unity that different modes correspond to
 637 * different monitors and it should not try to force the same resolution on
 638 * them.
 639 */
 640static void vbox_set_edid(struct drm_connector *connector, int width,
 641                          int height)
 642{
 643        enum { EDID_SIZE = 128 };
 644        unsigned char edid[EDID_SIZE] = {
 645                0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
 646                0x58, 0x58,     /* manufacturer (VBX) */
 647                0x00, 0x00,     /* product code */
 648                0x00, 0x00, 0x00, 0x00, /* serial number goes here */
 649                0x01,           /* week of manufacture */
 650                0x00,           /* year of manufacture */
 651                0x01, 0x03,     /* EDID version */
 652                0x80,           /* capabilities - digital */
 653                0x00,           /* horiz. res in cm, zero for projectors */
 654                0x00,           /* vert. res in cm */
 655                0x78,           /* display gamma (120 == 2.2). */
 656                0xEE,           /* features (standby, suspend, off, RGB, std */
 657                                /* colour space, preferred timing mode) */
 658                0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
 659                /* chromaticity for standard colour space. */
 660                0x00, 0x00, 0x00,       /* no default timings */
 661                0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 662                    0x01, 0x01,
 663                0x01, 0x01, 0x01, 0x01, /* no standard timings */
 664                0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
 665                    0x02, 0x02,
 666                /* descriptor block 1 goes below */
 667                0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 668                /* descriptor block 2, monitor ranges */
 669                0x00, 0x00, 0x00, 0xFD, 0x00,
 670                0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
 671                    0x20, 0x20,
 672                /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
 673                0x20,
 674                /* descriptor block 3, monitor name */
 675                0x00, 0x00, 0x00, 0xFC, 0x00,
 676                'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
 677                '\n',
 678                /* descriptor block 4: dummy data */
 679                0x00, 0x00, 0x00, 0x10, 0x00,
 680                0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
 681                0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 682                0x20,
 683                0x00,           /* number of extensions */
 684                0x00            /* checksum goes here */
 685        };
 686        int clock = (width + 6) * (height + 6) * 60 / 10000;
 687        unsigned int i, sum = 0;
 688
 689        edid[12] = width & 0xff;
 690        edid[13] = width >> 8;
 691        edid[14] = height & 0xff;
 692        edid[15] = height >> 8;
 693        edid[54] = clock & 0xff;
 694        edid[55] = clock >> 8;
 695        edid[56] = width & 0xff;
 696        edid[58] = (width >> 4) & 0xf0;
 697        edid[59] = height & 0xff;
 698        edid[61] = (height >> 4) & 0xf0;
 699        for (i = 0; i < EDID_SIZE - 1; ++i)
 700                sum += edid[i];
 701        edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
 702        drm_connector_update_edid_property(connector, (struct edid *)edid);
 703}
 704
 705static int vbox_get_modes(struct drm_connector *connector)
 706{
 707        struct vbox_connector *vbox_connector = NULL;
 708        struct drm_display_mode *mode = NULL;
 709        struct vbox_private *vbox = NULL;
 710        unsigned int num_modes = 0;
 711        int preferred_width, preferred_height;
 712
 713        vbox_connector = to_vbox_connector(connector);
 714        vbox = to_vbox_dev(connector->dev);
 715
 716        hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
 717                                    HOST_FLAGS_OFFSET);
 718        if (vbox_connector->vbox_crtc->crtc_id == 0)
 719                vbox_report_caps(vbox);
 720
 721        num_modes = drm_add_modes_noedid(connector, 2560, 1600);
 722        preferred_width = vbox_connector->mode_hint.width ?
 723                          vbox_connector->mode_hint.width : 1024;
 724        preferred_height = vbox_connector->mode_hint.height ?
 725                           vbox_connector->mode_hint.height : 768;
 726        mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
 727                            60, false, false, false);
 728        if (mode) {
 729                mode->type |= DRM_MODE_TYPE_PREFERRED;
 730                drm_mode_probed_add(connector, mode);
 731                ++num_modes;
 732        }
 733        vbox_set_edid(connector, preferred_width, preferred_height);
 734
 735        if (vbox_connector->vbox_crtc->x_hint != -1)
 736                drm_object_property_set_value(&connector->base,
 737                        vbox->ddev.mode_config.suggested_x_property,
 738                        vbox_connector->vbox_crtc->x_hint);
 739        else
 740                drm_object_property_set_value(&connector->base,
 741                        vbox->ddev.mode_config.suggested_x_property, 0);
 742
 743        if (vbox_connector->vbox_crtc->y_hint != -1)
 744                drm_object_property_set_value(&connector->base,
 745                        vbox->ddev.mode_config.suggested_y_property,
 746                        vbox_connector->vbox_crtc->y_hint);
 747        else
 748                drm_object_property_set_value(&connector->base,
 749                        vbox->ddev.mode_config.suggested_y_property, 0);
 750
 751        return num_modes;
 752}
 753
 754static void vbox_connector_destroy(struct drm_connector *connector)
 755{
 756        drm_connector_unregister(connector);
 757        drm_connector_cleanup(connector);
 758        kfree(connector);
 759}
 760
 761static enum drm_connector_status
 762vbox_connector_detect(struct drm_connector *connector, bool force)
 763{
 764        struct vbox_connector *vbox_connector;
 765
 766        vbox_connector = to_vbox_connector(connector);
 767
 768        return vbox_connector->mode_hint.disconnected ?
 769            connector_status_disconnected : connector_status_connected;
 770}
 771
 772static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
 773                           u32 max_y)
 774{
 775        struct vbox_connector *vbox_connector;
 776        struct drm_device *dev;
 777        struct drm_display_mode *mode, *iterator;
 778
 779        vbox_connector = to_vbox_connector(connector);
 780        dev = vbox_connector->base.dev;
 781        list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
 782                list_del(&mode->head);
 783                drm_mode_destroy(dev, mode);
 784        }
 785
 786        return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
 787}
 788
 789static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
 790        .get_modes = vbox_get_modes,
 791};
 792
 793static const struct drm_connector_funcs vbox_connector_funcs = {
 794        .detect = vbox_connector_detect,
 795        .fill_modes = vbox_fill_modes,
 796        .destroy = vbox_connector_destroy,
 797        .reset = drm_atomic_helper_connector_reset,
 798        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 799        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 800};
 801
 802static int vbox_connector_init(struct drm_device *dev,
 803                               struct vbox_crtc *vbox_crtc,
 804                               struct drm_encoder *encoder)
 805{
 806        struct vbox_connector *vbox_connector;
 807        struct drm_connector *connector;
 808
 809        vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
 810        if (!vbox_connector)
 811                return -ENOMEM;
 812
 813        connector = &vbox_connector->base;
 814        vbox_connector->vbox_crtc = vbox_crtc;
 815
 816        drm_connector_init(dev, connector, &vbox_connector_funcs,
 817                           DRM_MODE_CONNECTOR_VGA);
 818        drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
 819
 820        connector->interlace_allowed = 0;
 821        connector->doublescan_allowed = 0;
 822
 823        drm_mode_create_suggested_offset_properties(dev);
 824        drm_object_attach_property(&connector->base,
 825                                   dev->mode_config.suggested_x_property, 0);
 826        drm_object_attach_property(&connector->base,
 827                                   dev->mode_config.suggested_y_property, 0);
 828
 829        drm_connector_attach_encoder(connector, encoder);
 830
 831        return 0;
 832}
 833
 834static const struct drm_mode_config_funcs vbox_mode_funcs = {
 835        .fb_create = drm_gem_fb_create_with_dirty,
 836        .mode_valid = drm_vram_helper_mode_valid,
 837        .atomic_check = drm_atomic_helper_check,
 838        .atomic_commit = drm_atomic_helper_commit,
 839};
 840
 841int vbox_mode_init(struct vbox_private *vbox)
 842{
 843        struct drm_device *dev = &vbox->ddev;
 844        struct drm_encoder *encoder;
 845        struct vbox_crtc *vbox_crtc;
 846        unsigned int i;
 847        int ret;
 848
 849        drm_mode_config_init(dev);
 850
 851        dev->mode_config.funcs = (void *)&vbox_mode_funcs;
 852        dev->mode_config.min_width = 0;
 853        dev->mode_config.min_height = 0;
 854        dev->mode_config.preferred_depth = 24;
 855        dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
 856        dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
 857
 858        for (i = 0; i < vbox->num_crtcs; ++i) {
 859                vbox_crtc = vbox_crtc_init(dev, i);
 860                if (IS_ERR(vbox_crtc)) {
 861                        ret = PTR_ERR(vbox_crtc);
 862                        goto err_drm_mode_cleanup;
 863                }
 864                encoder = vbox_encoder_init(dev, i);
 865                if (!encoder) {
 866                        ret = -ENOMEM;
 867                        goto err_drm_mode_cleanup;
 868                }
 869                ret = vbox_connector_init(dev, vbox_crtc, encoder);
 870                if (ret)
 871                        goto err_drm_mode_cleanup;
 872        }
 873
 874        drm_mode_config_reset(dev);
 875        return 0;
 876
 877err_drm_mode_cleanup:
 878        drm_mode_config_cleanup(dev);
 879        return ret;
 880}
 881
 882void vbox_mode_fini(struct vbox_private *vbox)
 883{
 884        drm_mode_config_cleanup(&vbox->ddev);
 885}
 886