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0001 // SPDX-License-Identifier: MIT
0002 /*
0003  * Copyright (C) 2013-2017 Oracle Corporation
0004  * This file is based on ast_mode.c
0005  * Copyright 2012 Red Hat Inc.
0006  * Parts based on xf86-video-ast
0007  * Copyright (c) 2005 ASPEED Technology Inc.
0008  * Authors: Dave Airlie <airlied@redhat.com>
0009  *          Michael Thayer <michael.thayer@oracle.com,
0010  *          Hans de Goede <hdegoede@redhat.com>
0011  */
0012 
0013 #include <linux/iosys-map.h>
0014 #include <linux/export.h>
0015 
0016 #include <drm/drm_atomic.h>
0017 #include <drm/drm_atomic_helper.h>
0018 #include <drm/drm_edid.h>
0019 #include <drm/drm_fb_helper.h>
0020 #include <drm/drm_fourcc.h>
0021 #include <drm/drm_framebuffer.h>
0022 #include <drm/drm_gem_atomic_helper.h>
0023 #include <drm/drm_gem_framebuffer_helper.h>
0024 #include <drm/drm_plane_helper.h>
0025 #include <drm/drm_probe_helper.h>
0026 
0027 #include "hgsmi_channels.h"
0028 #include "vbox_drv.h"
0029 #include "vboxvideo.h"
0030 
0031 /*
0032  * Set a graphics mode.  Poke any required values into registers, do an HGSMI
0033  * mode set and tell the host we support advanced graphics functions.
0034  */
0035 static void vbox_do_modeset(struct drm_crtc *crtc)
0036 {
0037     struct drm_framebuffer *fb = crtc->primary->state->fb;
0038     struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
0039     struct vbox_private *vbox;
0040     int width, height, bpp, pitch;
0041     u16 flags;
0042     s32 x_offset, y_offset;
0043 
0044     vbox = to_vbox_dev(crtc->dev);
0045     width = vbox_crtc->width ? vbox_crtc->width : 640;
0046     height = vbox_crtc->height ? vbox_crtc->height : 480;
0047     bpp = fb ? fb->format->cpp[0] * 8 : 32;
0048     pitch = fb ? fb->pitches[0] : width * bpp / 8;
0049     x_offset = vbox->single_framebuffer ? vbox_crtc->x : vbox_crtc->x_hint;
0050     y_offset = vbox->single_framebuffer ? vbox_crtc->y : vbox_crtc->y_hint;
0051 
0052     /*
0053      * This is the old way of setting graphics modes.  It assumed one screen
0054      * and a frame-buffer at the start of video RAM.  On older versions of
0055      * VirtualBox, certain parts of the code still assume that the first
0056      * screen is programmed this way, so try to fake it.
0057      */
0058     if (vbox_crtc->crtc_id == 0 && fb &&
0059         vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
0060         vbox_crtc->fb_offset % (bpp / 8) == 0) {
0061         vbox_write_ioport(VBE_DISPI_INDEX_XRES, width);
0062         vbox_write_ioport(VBE_DISPI_INDEX_YRES, height);
0063         vbox_write_ioport(VBE_DISPI_INDEX_VIRT_WIDTH, pitch * 8 / bpp);
0064         vbox_write_ioport(VBE_DISPI_INDEX_BPP, bpp);
0065         vbox_write_ioport(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
0066         vbox_write_ioport(VBE_DISPI_INDEX_X_OFFSET,
0067             vbox_crtc->fb_offset % pitch / bpp * 8 + vbox_crtc->x);
0068         vbox_write_ioport(VBE_DISPI_INDEX_Y_OFFSET,
0069                   vbox_crtc->fb_offset / pitch + vbox_crtc->y);
0070     }
0071 
0072     flags = VBVA_SCREEN_F_ACTIVE;
0073     flags |= (fb && crtc->state->enable) ? 0 : VBVA_SCREEN_F_BLANK;
0074     flags |= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
0075     hgsmi_process_display_info(vbox->guest_pool, vbox_crtc->crtc_id,
0076                    x_offset, y_offset,
0077                    vbox_crtc->x * bpp / 8 +
0078                             vbox_crtc->y * pitch,
0079                    pitch, width, height, bpp, flags);
0080 }
0081 
0082 static int vbox_set_view(struct drm_crtc *crtc)
0083 {
0084     struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
0085     struct vbox_private *vbox = to_vbox_dev(crtc->dev);
0086     struct vbva_infoview *p;
0087 
0088     /*
0089      * Tell the host about the view.  This design originally targeted the
0090      * Windows XP driver architecture and assumed that each screen would
0091      * have a dedicated frame buffer with the command buffer following it,
0092      * the whole being a "view".  The host works out which screen a command
0093      * buffer belongs to by checking whether it is in the first view, then
0094      * whether it is in the second and so on.  The first match wins.  We
0095      * cheat around this by making the first view be the managed memory
0096      * plus the first command buffer, the second the same plus the second
0097      * buffer and so on.
0098      */
0099     p = hgsmi_buffer_alloc(vbox->guest_pool, sizeof(*p),
0100                    HGSMI_CH_VBVA, VBVA_INFO_VIEW);
0101     if (!p)
0102         return -ENOMEM;
0103 
0104     p->view_index = vbox_crtc->crtc_id;
0105     p->view_offset = vbox_crtc->fb_offset;
0106     p->view_size = vbox->available_vram_size - vbox_crtc->fb_offset +
0107                vbox_crtc->crtc_id * VBVA_MIN_BUFFER_SIZE;
0108     p->max_screen_size = vbox->available_vram_size - vbox_crtc->fb_offset;
0109 
0110     hgsmi_buffer_submit(vbox->guest_pool, p);
0111     hgsmi_buffer_free(vbox->guest_pool, p);
0112 
0113     return 0;
0114 }
0115 
0116 /*
0117  * Try to map the layout of virtual screens to the range of the input device.
0118  * Return true if we need to re-set the crtc modes due to screen offset
0119  * changes.
0120  */
0121 static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
0122 {
0123     struct drm_crtc *crtci;
0124     struct drm_connector *connectori;
0125     struct drm_framebuffer *fb, *fb1 = NULL;
0126     bool single_framebuffer = true;
0127     bool old_single_framebuffer = vbox->single_framebuffer;
0128     u16 width = 0, height = 0;
0129 
0130     /*
0131      * Are we using an X.Org-style single large frame-buffer for all crtcs?
0132      * If so then screen layout can be deduced from the crtc offsets.
0133      * Same fall-back if this is the fbdev frame-buffer.
0134      */
0135     list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
0136         fb = crtci->primary->state->fb;
0137         if (!fb)
0138             continue;
0139 
0140         if (!fb1) {
0141             fb1 = fb;
0142             if (fb1 == vbox->ddev.fb_helper->fb)
0143                 break;
0144         } else if (fb != fb1) {
0145             single_framebuffer = false;
0146         }
0147     }
0148     if (!fb1)
0149         return false;
0150 
0151     if (single_framebuffer) {
0152         vbox->single_framebuffer = true;
0153         vbox->input_mapping_width = fb1->width;
0154         vbox->input_mapping_height = fb1->height;
0155         return old_single_framebuffer != vbox->single_framebuffer;
0156     }
0157     /* Otherwise calculate the total span of all screens. */
0158     list_for_each_entry(connectori, &vbox->ddev.mode_config.connector_list,
0159                 head) {
0160         struct vbox_connector *vbox_connector =
0161             to_vbox_connector(connectori);
0162         struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
0163 
0164         width = max_t(u16, width, vbox_crtc->x_hint +
0165                       vbox_connector->mode_hint.width);
0166         height = max_t(u16, height, vbox_crtc->y_hint +
0167                         vbox_connector->mode_hint.height);
0168     }
0169 
0170     vbox->single_framebuffer = false;
0171     vbox->input_mapping_width = width;
0172     vbox->input_mapping_height = height;
0173 
0174     return old_single_framebuffer != vbox->single_framebuffer;
0175 }
0176 
0177 static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
0178                     struct drm_framebuffer *fb,
0179                     int x, int y)
0180 {
0181     struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(fb->obj[0]);
0182     struct vbox_private *vbox = to_vbox_dev(crtc->dev);
0183     struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
0184     bool needs_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
0185 
0186     mutex_lock(&vbox->hw_mutex);
0187 
0188     if (crtc->state->enable) {
0189         vbox_crtc->width = crtc->state->mode.hdisplay;
0190         vbox_crtc->height = crtc->state->mode.vdisplay;
0191     }
0192 
0193     vbox_crtc->x = x;
0194     vbox_crtc->y = y;
0195     vbox_crtc->fb_offset = drm_gem_vram_offset(gbo);
0196 
0197     /* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
0198     if (needs_modeset && vbox_set_up_input_mapping(vbox)) {
0199         struct drm_crtc *crtci;
0200 
0201         list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list,
0202                     head) {
0203             if (crtci == crtc)
0204                 continue;
0205             vbox_do_modeset(crtci);
0206         }
0207     }
0208 
0209     vbox_set_view(crtc);
0210     vbox_do_modeset(crtc);
0211 
0212     if (needs_modeset)
0213         hgsmi_update_input_mapping(vbox->guest_pool, 0, 0,
0214                        vbox->input_mapping_width,
0215                        vbox->input_mapping_height);
0216 
0217     mutex_unlock(&vbox->hw_mutex);
0218 }
0219 
0220 static void vbox_crtc_atomic_enable(struct drm_crtc *crtc,
0221                     struct drm_atomic_state *state)
0222 {
0223 }
0224 
0225 static void vbox_crtc_atomic_disable(struct drm_crtc *crtc,
0226                      struct drm_atomic_state *state)
0227 {
0228 }
0229 
0230 static void vbox_crtc_atomic_flush(struct drm_crtc *crtc,
0231                    struct drm_atomic_state *state)
0232 {
0233 }
0234 
0235 static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
0236     .atomic_enable = vbox_crtc_atomic_enable,
0237     .atomic_disable = vbox_crtc_atomic_disable,
0238     .atomic_flush = vbox_crtc_atomic_flush,
0239 };
0240 
0241 static void vbox_crtc_destroy(struct drm_crtc *crtc)
0242 {
0243     drm_crtc_cleanup(crtc);
0244     kfree(crtc);
0245 }
0246 
0247 static const struct drm_crtc_funcs vbox_crtc_funcs = {
0248     .set_config = drm_atomic_helper_set_config,
0249     .page_flip = drm_atomic_helper_page_flip,
0250     /* .gamma_set = vbox_crtc_gamma_set, */
0251     .destroy = vbox_crtc_destroy,
0252     .reset = drm_atomic_helper_crtc_reset,
0253     .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
0254     .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
0255 };
0256 
0257 static int vbox_primary_atomic_check(struct drm_plane *plane,
0258                      struct drm_atomic_state *state)
0259 {
0260     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
0261                                        plane);
0262     struct drm_crtc_state *crtc_state = NULL;
0263 
0264     if (new_state->crtc) {
0265         crtc_state = drm_atomic_get_existing_crtc_state(state,
0266                                 new_state->crtc);
0267         if (WARN_ON(!crtc_state))
0268             return -EINVAL;
0269     }
0270 
0271     return drm_atomic_helper_check_plane_state(new_state, crtc_state,
0272                            DRM_PLANE_HELPER_NO_SCALING,
0273                            DRM_PLANE_HELPER_NO_SCALING,
0274                            false, true);
0275 }
0276 
0277 static void vbox_primary_atomic_update(struct drm_plane *plane,
0278                        struct drm_atomic_state *state)
0279 {
0280     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
0281                                        plane);
0282     struct drm_crtc *crtc = new_state->crtc;
0283     struct drm_framebuffer *fb = new_state->fb;
0284     struct vbox_private *vbox = to_vbox_dev(fb->dev);
0285     struct drm_mode_rect *clips;
0286     uint32_t num_clips, i;
0287 
0288     vbox_crtc_set_base_and_mode(crtc, fb,
0289                     new_state->src_x >> 16,
0290                     new_state->src_y >> 16);
0291 
0292     /* Send information about dirty rectangles to VBVA. */
0293 
0294     clips = drm_plane_get_damage_clips(new_state);
0295     num_clips = drm_plane_get_damage_clips_count(new_state);
0296 
0297     if (!num_clips)
0298         return;
0299 
0300     mutex_lock(&vbox->hw_mutex);
0301 
0302     for (i = 0; i < num_clips; ++i, ++clips) {
0303         struct vbva_cmd_hdr cmd_hdr;
0304         unsigned int crtc_id = to_vbox_crtc(crtc)->crtc_id;
0305 
0306         cmd_hdr.x = (s16)clips->x1;
0307         cmd_hdr.y = (s16)clips->y1;
0308         cmd_hdr.w = (u16)clips->x2 - clips->x1;
0309         cmd_hdr.h = (u16)clips->y2 - clips->y1;
0310 
0311         if (!vbva_buffer_begin_update(&vbox->vbva_info[crtc_id],
0312                           vbox->guest_pool))
0313             continue;
0314 
0315         vbva_write(&vbox->vbva_info[crtc_id], vbox->guest_pool,
0316                &cmd_hdr, sizeof(cmd_hdr));
0317         vbva_buffer_end_update(&vbox->vbva_info[crtc_id]);
0318     }
0319 
0320     mutex_unlock(&vbox->hw_mutex);
0321 }
0322 
0323 static void vbox_primary_atomic_disable(struct drm_plane *plane,
0324                     struct drm_atomic_state *state)
0325 {
0326     struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
0327                                        plane);
0328     struct drm_crtc *crtc = old_state->crtc;
0329 
0330     /* vbox_do_modeset checks plane->state->fb and will disable if NULL */
0331     vbox_crtc_set_base_and_mode(crtc, old_state->fb,
0332                     old_state->src_x >> 16,
0333                     old_state->src_y >> 16);
0334 }
0335 
0336 static int vbox_cursor_atomic_check(struct drm_plane *plane,
0337                     struct drm_atomic_state *state)
0338 {
0339     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
0340                                        plane);
0341     struct drm_crtc_state *crtc_state = NULL;
0342     u32 width = new_state->crtc_w;
0343     u32 height = new_state->crtc_h;
0344     int ret;
0345 
0346     if (new_state->crtc) {
0347         crtc_state = drm_atomic_get_existing_crtc_state(state,
0348                                 new_state->crtc);
0349         if (WARN_ON(!crtc_state))
0350             return -EINVAL;
0351     }
0352 
0353     ret = drm_atomic_helper_check_plane_state(new_state, crtc_state,
0354                           DRM_PLANE_HELPER_NO_SCALING,
0355                           DRM_PLANE_HELPER_NO_SCALING,
0356                           true, true);
0357     if (ret)
0358         return ret;
0359 
0360     if (!new_state->fb)
0361         return 0;
0362 
0363     if (width > VBOX_MAX_CURSOR_WIDTH || height > VBOX_MAX_CURSOR_HEIGHT ||
0364         width == 0 || height == 0)
0365         return -EINVAL;
0366 
0367     return 0;
0368 }
0369 
0370 /*
0371  * Copy the ARGB image and generate the mask, which is needed in case the host
0372  * does not support ARGB cursors.  The mask is a 1BPP bitmap with the bit set
0373  * if the corresponding alpha value in the ARGB image is greater than 0xF0.
0374  */
0375 static void copy_cursor_image(u8 *src, u8 *dst, u32 width, u32 height,
0376                   size_t mask_size)
0377 {
0378     size_t line_size = (width + 7) / 8;
0379     u32 i, j;
0380 
0381     memcpy(dst + mask_size, src, width * height * 4);
0382     for (i = 0; i < height; ++i)
0383         for (j = 0; j < width; ++j)
0384             if (((u32 *)src)[i * width + j] > 0xf0000000)
0385                 dst[i * line_size + j / 8] |= (0x80 >> (j % 8));
0386 }
0387 
0388 static void vbox_cursor_atomic_update(struct drm_plane *plane,
0389                       struct drm_atomic_state *state)
0390 {
0391     struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
0392                                        plane);
0393     struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
0394                                        plane);
0395     struct vbox_private *vbox =
0396         container_of(plane->dev, struct vbox_private, ddev);
0397     struct vbox_crtc *vbox_crtc = to_vbox_crtc(new_state->crtc);
0398     struct drm_framebuffer *fb = new_state->fb;
0399     u32 width = new_state->crtc_w;
0400     u32 height = new_state->crtc_h;
0401     struct drm_shadow_plane_state *shadow_plane_state =
0402         to_drm_shadow_plane_state(new_state);
0403     struct iosys_map map = shadow_plane_state->data[0];
0404     u8 *src = map.vaddr; /* TODO: Use mapping abstraction properly */
0405     size_t data_size, mask_size;
0406     u32 flags;
0407 
0408     /*
0409      * VirtualBox uses the host windowing system to draw the cursor so
0410      * moves are a no-op, we only need to upload new cursor sprites.
0411      */
0412     if (fb == old_state->fb)
0413         return;
0414 
0415     mutex_lock(&vbox->hw_mutex);
0416 
0417     vbox_crtc->cursor_enabled = true;
0418 
0419     /*
0420      * The mask must be calculated based on the alpha
0421      * channel, one bit per ARGB word, and must be 32-bit
0422      * padded.
0423      */
0424     mask_size = ((width + 7) / 8 * height + 3) & ~3;
0425     data_size = width * height * 4 + mask_size;
0426 
0427     copy_cursor_image(src, vbox->cursor_data, width, height, mask_size);
0428 
0429     flags = VBOX_MOUSE_POINTER_VISIBLE | VBOX_MOUSE_POINTER_SHAPE |
0430         VBOX_MOUSE_POINTER_ALPHA;
0431     hgsmi_update_pointer_shape(vbox->guest_pool, flags,
0432                    min_t(u32, max(fb->hot_x, 0), width),
0433                    min_t(u32, max(fb->hot_y, 0), height),
0434                    width, height, vbox->cursor_data, data_size);
0435 
0436     mutex_unlock(&vbox->hw_mutex);
0437 }
0438 
0439 static void vbox_cursor_atomic_disable(struct drm_plane *plane,
0440                        struct drm_atomic_state *state)
0441 {
0442     struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
0443                                        plane);
0444     struct vbox_private *vbox =
0445         container_of(plane->dev, struct vbox_private, ddev);
0446     struct vbox_crtc *vbox_crtc = to_vbox_crtc(old_state->crtc);
0447     bool cursor_enabled = false;
0448     struct drm_crtc *crtci;
0449 
0450     mutex_lock(&vbox->hw_mutex);
0451 
0452     vbox_crtc->cursor_enabled = false;
0453 
0454     list_for_each_entry(crtci, &vbox->ddev.mode_config.crtc_list, head) {
0455         if (to_vbox_crtc(crtci)->cursor_enabled)
0456             cursor_enabled = true;
0457     }
0458 
0459     if (!cursor_enabled)
0460         hgsmi_update_pointer_shape(vbox->guest_pool, 0, 0, 0,
0461                        0, 0, NULL, 0);
0462 
0463     mutex_unlock(&vbox->hw_mutex);
0464 }
0465 
0466 static const u32 vbox_cursor_plane_formats[] = {
0467     DRM_FORMAT_ARGB8888,
0468 };
0469 
0470 static const struct drm_plane_helper_funcs vbox_cursor_helper_funcs = {
0471     .atomic_check   = vbox_cursor_atomic_check,
0472     .atomic_update  = vbox_cursor_atomic_update,
0473     .atomic_disable = vbox_cursor_atomic_disable,
0474     DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
0475 };
0476 
0477 static const struct drm_plane_funcs vbox_cursor_plane_funcs = {
0478     .update_plane   = drm_atomic_helper_update_plane,
0479     .disable_plane  = drm_atomic_helper_disable_plane,
0480     .destroy    = drm_primary_helper_destroy,
0481     DRM_GEM_SHADOW_PLANE_FUNCS,
0482 };
0483 
0484 static const u32 vbox_primary_plane_formats[] = {
0485     DRM_FORMAT_XRGB8888,
0486     DRM_FORMAT_ARGB8888,
0487 };
0488 
0489 static const struct drm_plane_helper_funcs vbox_primary_helper_funcs = {
0490     .atomic_check = vbox_primary_atomic_check,
0491     .atomic_update = vbox_primary_atomic_update,
0492     .atomic_disable = vbox_primary_atomic_disable,
0493     DRM_GEM_VRAM_PLANE_HELPER_FUNCS,
0494 };
0495 
0496 static const struct drm_plane_funcs vbox_primary_plane_funcs = {
0497     .update_plane   = drm_atomic_helper_update_plane,
0498     .disable_plane  = drm_atomic_helper_disable_plane,
0499     .destroy    = drm_primary_helper_destroy,
0500     .reset      = drm_atomic_helper_plane_reset,
0501     .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
0502     .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
0503 };
0504 
0505 static struct drm_plane *vbox_create_plane(struct vbox_private *vbox,
0506                        unsigned int possible_crtcs,
0507                        enum drm_plane_type type)
0508 {
0509     const struct drm_plane_helper_funcs *helper_funcs = NULL;
0510     const struct drm_plane_funcs *funcs;
0511     struct drm_plane *plane;
0512     const u32 *formats;
0513     int num_formats;
0514     int err;
0515 
0516     if (type == DRM_PLANE_TYPE_PRIMARY) {
0517         funcs = &vbox_primary_plane_funcs;
0518         formats = vbox_primary_plane_formats;
0519         helper_funcs = &vbox_primary_helper_funcs;
0520         num_formats = ARRAY_SIZE(vbox_primary_plane_formats);
0521     } else if (type == DRM_PLANE_TYPE_CURSOR) {
0522         funcs = &vbox_cursor_plane_funcs;
0523         formats = vbox_cursor_plane_formats;
0524         helper_funcs = &vbox_cursor_helper_funcs;
0525         num_formats = ARRAY_SIZE(vbox_cursor_plane_formats);
0526     } else {
0527         return ERR_PTR(-EINVAL);
0528     }
0529 
0530     plane = kzalloc(sizeof(*plane), GFP_KERNEL);
0531     if (!plane)
0532         return ERR_PTR(-ENOMEM);
0533 
0534     err = drm_universal_plane_init(&vbox->ddev, plane, possible_crtcs,
0535                        funcs, formats, num_formats,
0536                        NULL, type, NULL);
0537     if (err)
0538         goto free_plane;
0539 
0540     drm_plane_helper_add(plane, helper_funcs);
0541 
0542     return plane;
0543 
0544 free_plane:
0545     kfree(plane);
0546     return ERR_PTR(-EINVAL);
0547 }
0548 
0549 static struct vbox_crtc *vbox_crtc_init(struct drm_device *dev, unsigned int i)
0550 {
0551     struct vbox_private *vbox =
0552         container_of(dev, struct vbox_private, ddev);
0553     struct drm_plane *cursor = NULL;
0554     struct vbox_crtc *vbox_crtc;
0555     struct drm_plane *primary;
0556     u32 caps = 0;
0557     int ret;
0558 
0559     ret = hgsmi_query_conf(vbox->guest_pool,
0560                    VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
0561     if (ret)
0562         return ERR_PTR(ret);
0563 
0564     vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
0565     if (!vbox_crtc)
0566         return ERR_PTR(-ENOMEM);
0567 
0568     primary = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_PRIMARY);
0569     if (IS_ERR(primary)) {
0570         ret = PTR_ERR(primary);
0571         goto free_mem;
0572     }
0573 
0574     if ((caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
0575         cursor = vbox_create_plane(vbox, 1 << i, DRM_PLANE_TYPE_CURSOR);
0576         if (IS_ERR(cursor)) {
0577             ret = PTR_ERR(cursor);
0578             goto clean_primary;
0579         }
0580     } else {
0581         DRM_WARN("VirtualBox host is too old, no cursor support\n");
0582     }
0583 
0584     vbox_crtc->crtc_id = i;
0585 
0586     ret = drm_crtc_init_with_planes(dev, &vbox_crtc->base, primary, cursor,
0587                     &vbox_crtc_funcs, NULL);
0588     if (ret)
0589         goto clean_cursor;
0590 
0591     drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
0592     drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
0593 
0594     return vbox_crtc;
0595 
0596 clean_cursor:
0597     if (cursor) {
0598         drm_plane_cleanup(cursor);
0599         kfree(cursor);
0600     }
0601 clean_primary:
0602     drm_plane_cleanup(primary);
0603     kfree(primary);
0604 free_mem:
0605     kfree(vbox_crtc);
0606     return ERR_PTR(ret);
0607 }
0608 
0609 static void vbox_encoder_destroy(struct drm_encoder *encoder)
0610 {
0611     drm_encoder_cleanup(encoder);
0612     kfree(encoder);
0613 }
0614 
0615 static const struct drm_encoder_funcs vbox_enc_funcs = {
0616     .destroy = vbox_encoder_destroy,
0617 };
0618 
0619 static struct drm_encoder *vbox_encoder_init(struct drm_device *dev,
0620                          unsigned int i)
0621 {
0622     struct vbox_encoder *vbox_encoder;
0623 
0624     vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
0625     if (!vbox_encoder)
0626         return NULL;
0627 
0628     drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
0629              DRM_MODE_ENCODER_DAC, NULL);
0630 
0631     vbox_encoder->base.possible_crtcs = 1 << i;
0632     return &vbox_encoder->base;
0633 }
0634 
0635 /*
0636  * Generate EDID data with a mode-unique serial number for the virtual
0637  * monitor to try to persuade Unity that different modes correspond to
0638  * different monitors and it should not try to force the same resolution on
0639  * them.
0640  */
0641 static void vbox_set_edid(struct drm_connector *connector, int width,
0642               int height)
0643 {
0644     enum { EDID_SIZE = 128 };
0645     unsigned char edid[EDID_SIZE] = {
0646         0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
0647         0x58, 0x58, /* manufacturer (VBX) */
0648         0x00, 0x00, /* product code */
0649         0x00, 0x00, 0x00, 0x00, /* serial number goes here */
0650         0x01,       /* week of manufacture */
0651         0x00,       /* year of manufacture */
0652         0x01, 0x03, /* EDID version */
0653         0x80,       /* capabilities - digital */
0654         0x00,       /* horiz. res in cm, zero for projectors */
0655         0x00,       /* vert. res in cm */
0656         0x78,       /* display gamma (120 == 2.2). */
0657         0xEE,       /* features (standby, suspend, off, RGB, std */
0658                 /* colour space, preferred timing mode) */
0659         0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
0660         /* chromaticity for standard colour space. */
0661         0x00, 0x00, 0x00,   /* no default timings */
0662         0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0663             0x01, 0x01,
0664         0x01, 0x01, 0x01, 0x01, /* no standard timings */
0665         0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
0666             0x02, 0x02,
0667         /* descriptor block 1 goes below */
0668         0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0669         /* descriptor block 2, monitor ranges */
0670         0x00, 0x00, 0x00, 0xFD, 0x00,
0671         0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
0672             0x20, 0x20,
0673         /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
0674         0x20,
0675         /* descriptor block 3, monitor name */
0676         0x00, 0x00, 0x00, 0xFC, 0x00,
0677         'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
0678         '\n',
0679         /* descriptor block 4: dummy data */
0680         0x00, 0x00, 0x00, 0x10, 0x00,
0681         0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
0682         0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0683         0x20,
0684         0x00,       /* number of extensions */
0685         0x00        /* checksum goes here */
0686     };
0687     int clock = (width + 6) * (height + 6) * 60 / 10000;
0688     unsigned int i, sum = 0;
0689 
0690     edid[12] = width & 0xff;
0691     edid[13] = width >> 8;
0692     edid[14] = height & 0xff;
0693     edid[15] = height >> 8;
0694     edid[54] = clock & 0xff;
0695     edid[55] = clock >> 8;
0696     edid[56] = width & 0xff;
0697     edid[58] = (width >> 4) & 0xf0;
0698     edid[59] = height & 0xff;
0699     edid[61] = (height >> 4) & 0xf0;
0700     for (i = 0; i < EDID_SIZE - 1; ++i)
0701         sum += edid[i];
0702     edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
0703     drm_connector_update_edid_property(connector, (struct edid *)edid);
0704 }
0705 
0706 static int vbox_get_modes(struct drm_connector *connector)
0707 {
0708     struct vbox_connector *vbox_connector = NULL;
0709     struct drm_display_mode *mode = NULL;
0710     struct vbox_private *vbox = NULL;
0711     unsigned int num_modes = 0;
0712     int preferred_width, preferred_height;
0713 
0714     vbox_connector = to_vbox_connector(connector);
0715     vbox = to_vbox_dev(connector->dev);
0716 
0717     hgsmi_report_flags_location(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
0718                     HOST_FLAGS_OFFSET);
0719     if (vbox_connector->vbox_crtc->crtc_id == 0)
0720         vbox_report_caps(vbox);
0721 
0722     num_modes = drm_add_modes_noedid(connector, 2560, 1600);
0723     preferred_width = vbox_connector->mode_hint.width ?
0724               vbox_connector->mode_hint.width : 1024;
0725     preferred_height = vbox_connector->mode_hint.height ?
0726                vbox_connector->mode_hint.height : 768;
0727     mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
0728                 60, false, false, false);
0729     if (mode) {
0730         mode->type |= DRM_MODE_TYPE_PREFERRED;
0731         drm_mode_probed_add(connector, mode);
0732         ++num_modes;
0733     }
0734     vbox_set_edid(connector, preferred_width, preferred_height);
0735 
0736     if (vbox_connector->vbox_crtc->x_hint != -1)
0737         drm_object_property_set_value(&connector->base,
0738             vbox->ddev.mode_config.suggested_x_property,
0739             vbox_connector->vbox_crtc->x_hint);
0740     else
0741         drm_object_property_set_value(&connector->base,
0742             vbox->ddev.mode_config.suggested_x_property, 0);
0743 
0744     if (vbox_connector->vbox_crtc->y_hint != -1)
0745         drm_object_property_set_value(&connector->base,
0746             vbox->ddev.mode_config.suggested_y_property,
0747             vbox_connector->vbox_crtc->y_hint);
0748     else
0749         drm_object_property_set_value(&connector->base,
0750             vbox->ddev.mode_config.suggested_y_property, 0);
0751 
0752     return num_modes;
0753 }
0754 
0755 static void vbox_connector_destroy(struct drm_connector *connector)
0756 {
0757     drm_connector_unregister(connector);
0758     drm_connector_cleanup(connector);
0759     kfree(connector);
0760 }
0761 
0762 static enum drm_connector_status
0763 vbox_connector_detect(struct drm_connector *connector, bool force)
0764 {
0765     struct vbox_connector *vbox_connector;
0766 
0767     vbox_connector = to_vbox_connector(connector);
0768 
0769     return vbox_connector->mode_hint.disconnected ?
0770         connector_status_disconnected : connector_status_connected;
0771 }
0772 
0773 static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
0774                u32 max_y)
0775 {
0776     struct vbox_connector *vbox_connector;
0777     struct drm_device *dev;
0778     struct drm_display_mode *mode, *iterator;
0779 
0780     vbox_connector = to_vbox_connector(connector);
0781     dev = vbox_connector->base.dev;
0782     list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
0783         list_del(&mode->head);
0784         drm_mode_destroy(dev, mode);
0785     }
0786 
0787     return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
0788 }
0789 
0790 static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
0791     .get_modes = vbox_get_modes,
0792 };
0793 
0794 static const struct drm_connector_funcs vbox_connector_funcs = {
0795     .detect = vbox_connector_detect,
0796     .fill_modes = vbox_fill_modes,
0797     .destroy = vbox_connector_destroy,
0798     .reset = drm_atomic_helper_connector_reset,
0799     .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0800     .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
0801 };
0802 
0803 static int vbox_connector_init(struct drm_device *dev,
0804                    struct vbox_crtc *vbox_crtc,
0805                    struct drm_encoder *encoder)
0806 {
0807     struct vbox_connector *vbox_connector;
0808     struct drm_connector *connector;
0809 
0810     vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
0811     if (!vbox_connector)
0812         return -ENOMEM;
0813 
0814     connector = &vbox_connector->base;
0815     vbox_connector->vbox_crtc = vbox_crtc;
0816 
0817     drm_connector_init(dev, connector, &vbox_connector_funcs,
0818                DRM_MODE_CONNECTOR_VGA);
0819     drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
0820 
0821     connector->interlace_allowed = 0;
0822     connector->doublescan_allowed = 0;
0823 
0824     drm_mode_create_suggested_offset_properties(dev);
0825     drm_object_attach_property(&connector->base,
0826                    dev->mode_config.suggested_x_property, 0);
0827     drm_object_attach_property(&connector->base,
0828                    dev->mode_config.suggested_y_property, 0);
0829 
0830     drm_connector_attach_encoder(connector, encoder);
0831 
0832     return 0;
0833 }
0834 
0835 static const struct drm_mode_config_funcs vbox_mode_funcs = {
0836     .fb_create = drm_gem_fb_create_with_dirty,
0837     .mode_valid = drm_vram_helper_mode_valid,
0838     .atomic_check = drm_atomic_helper_check,
0839     .atomic_commit = drm_atomic_helper_commit,
0840 };
0841 
0842 int vbox_mode_init(struct vbox_private *vbox)
0843 {
0844     struct drm_device *dev = &vbox->ddev;
0845     struct drm_encoder *encoder;
0846     struct vbox_crtc *vbox_crtc;
0847     unsigned int i;
0848     int ret;
0849 
0850     drm_mode_config_init(dev);
0851 
0852     dev->mode_config.funcs = (void *)&vbox_mode_funcs;
0853     dev->mode_config.min_width = 0;
0854     dev->mode_config.min_height = 0;
0855     dev->mode_config.preferred_depth = 24;
0856     dev->mode_config.max_width = VBE_DISPI_MAX_XRES;
0857     dev->mode_config.max_height = VBE_DISPI_MAX_YRES;
0858 
0859     for (i = 0; i < vbox->num_crtcs; ++i) {
0860         vbox_crtc = vbox_crtc_init(dev, i);
0861         if (IS_ERR(vbox_crtc)) {
0862             ret = PTR_ERR(vbox_crtc);
0863             goto err_drm_mode_cleanup;
0864         }
0865         encoder = vbox_encoder_init(dev, i);
0866         if (!encoder) {
0867             ret = -ENOMEM;
0868             goto err_drm_mode_cleanup;
0869         }
0870         ret = vbox_connector_init(dev, vbox_crtc, encoder);
0871         if (ret)
0872             goto err_drm_mode_cleanup;
0873     }
0874 
0875     drm_mode_config_reset(dev);
0876     return 0;
0877 
0878 err_drm_mode_cleanup:
0879     drm_mode_config_cleanup(dev);
0880     return ret;
0881 }
0882 
0883 void vbox_mode_fini(struct vbox_private *vbox)
0884 {
0885     drm_mode_config_cleanup(&vbox->ddev);
0886 }
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