drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_kms.h"
  29
  30
  31 #define vmw_crtc_to_ldu(x) \
  32         container_of(x, struct vmw_legacy_display_unit, base.crtc)
  33 #define vmw_encoder_to_ldu(x) \
  34         container_of(x, struct vmw_legacy_display_unit, base.encoder)
  35 #define vmw_connector_to_ldu(x) \
  36         container_of(x, struct vmw_legacy_display_unit, base.connector)
  37
  38 struct vmw_legacy_display {
  39         struct list_head active;
  40
  41         unsigned num_active;
  42         unsigned last_num_active;
  43
  44         struct vmw_framebuffer *fb;
  45 };
  46
  47 /**
  48  * Display unit using the legacy register interface.
  49  */
  50 struct vmw_legacy_display_unit {
  51         struct vmw_display_unit base;
  52
  53         struct list_head active;
  54 };
  55
  56 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
  57 {
  58         list_del_init(&ldu->active);
  59         vmw_display_unit_cleanup(&ldu->base);
  60         kfree(ldu);
  61 }
  62
  63
  64 /*
  65  * Legacy Display Unit CRTC functions
  66  */
  67
  68 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
  69 {
  70         vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
  71 }
  72
  73 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
  74 {
  75         struct vmw_legacy_display *lds = dev_priv->ldu_priv;
  76         struct vmw_legacy_display_unit *entry;
  77         struct drm_framebuffer *fb = NULL;
  78         struct drm_crtc *crtc = NULL;
  79         int i = 0;
  80
  81         /* If there is no display topology the host just assumes
  82          * that the guest will set the same layout as the host.
  83          */
  84         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
  85                 int w = 0, h = 0;
  86                 list_for_each_entry(entry, &lds->active, active) {
  87                         crtc = &entry->base.crtc;
  88                         w = max(w, crtc->x + crtc->mode.hdisplay);
  89                         h = max(h, crtc->y + crtc->mode.vdisplay);
  90                         i++;
  91                 }
  92
  93                 if (crtc == NULL)
  94                         return 0;
  95                 fb = entry->base.crtc.fb;
  96
  97                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitch,
  98                                           fb->bits_per_pixel, fb->depth);
  99         }
 100
 101         if (!list_empty(&lds->active)) {
 102                 entry = list_entry(lds->active.next, typeof(*entry), active);
 103                 fb = entry->base.crtc.fb;
 104
 105                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitch,
 106                                    fb->bits_per_pixel, fb->depth);
 107         }
 108
 109         /* Make sure we always show something. */
 110         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 111                   lds->num_active ? lds->num_active : 1);
 112
 113         i = 0;
 114         list_for_each_entry(entry, &lds->active, active) {
 115                 crtc = &entry->base.crtc;
 116
 117                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 118                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 119                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 120                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 124
 125                 i++;
 126         }
 127
 128         BUG_ON(i != lds->num_active);
 129
 130         lds->last_num_active = lds->num_active;
 131
 132         return 0;
 133 }
 134
 135 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 136                               struct vmw_legacy_display_unit *ldu)
 137 {
 138         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 139         if (list_empty(&ldu->active))
 140                 return 0;
 141
 142         /* Must init otherwise list_empty(&ldu->active) will not work. */
 143         list_del_init(&ldu->active);
 144         if (--(ld->num_active) == 0) {
 145                 BUG_ON(!ld->fb);
 146                 if (ld->fb->unpin)
 147                         ld->fb->unpin(ld->fb);
 148                 ld->fb = NULL;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 155                               struct vmw_legacy_display_unit *ldu,
 156                               struct vmw_framebuffer *vfb)
 157 {
 158         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 159         struct vmw_legacy_display_unit *entry;
 160         struct list_head *at;
 161
 162         BUG_ON(!ld->num_active && ld->fb);
 163         if (vfb != ld->fb) {
 164                 if (ld->fb && ld->fb->unpin)
 165                         ld->fb->unpin(ld->fb);
 166                 if (vfb->pin)
 167                         vfb->pin(vfb);
 168                 ld->fb = vfb;
 169         }
 170
 171         if (!list_empty(&ldu->active))
 172                 return 0;
 173
 174         at = &ld->active;
 175         list_for_each_entry(entry, &ld->active, active) {
 176                 if (entry->base.unit > ldu->base.unit)
 177                         break;
 178
 179                 at = &entry->active;
 180         }
 181
 182         list_add(&ldu->active, at);
 183
 184         ld->num_active++;
 185
 186         return 0;
 187 }
 188
 189 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
 190 {
 191         struct vmw_private *dev_priv;
 192         struct vmw_legacy_display_unit *ldu;
 193         struct drm_connector *connector;
 194         struct drm_display_mode *mode;
 195         struct drm_encoder *encoder;
 196         struct vmw_framebuffer *vfb;
 197         struct drm_framebuffer *fb;
 198         struct drm_crtc *crtc;
 199
 200         if (!set)
 201                 return -EINVAL;
 202
 203         if (!set->crtc)
 204                 return -EINVAL;
 205
 206         /* get the ldu */
 207         crtc = set->crtc;
 208         ldu = vmw_crtc_to_ldu(crtc);
 209         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 210         dev_priv = vmw_priv(crtc->dev);
 211
 212         if (set->num_connectors > 1) {
 213                 DRM_ERROR("to many connectors\n");
 214                 return -EINVAL;
 215         }
 216
 217         if (set->num_connectors == 1 &&
 218             set->connectors[0] != &ldu->base.connector) {
 219                 DRM_ERROR("connector doesn't match %p %p\n",
 220                         set->connectors[0], &ldu->base.connector);
 221                 return -EINVAL;
 222         }
 223
 224         /* ldu only supports one fb active at the time */
 225         if (dev_priv->ldu_priv->fb && vfb &&
 226             !(dev_priv->ldu_priv->num_active == 1 &&
 227               !list_empty(&ldu->active)) &&
 228             dev_priv->ldu_priv->fb != vfb) {
 229                 DRM_ERROR("Multiple framebuffers not supported\n");
 230                 return -EINVAL;
 231         }
 232
 233         /* since they always map one to one these are safe */
 234         connector = &ldu->base.connector;
 235         encoder = &ldu->base.encoder;
 236
 237         /* should we turn the crtc off? */
 238         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 239
 240                 connector->encoder = NULL;
 241                 encoder->crtc = NULL;
 242                 crtc->fb = NULL;
 243
 244                 vmw_ldu_del_active(dev_priv, ldu);
 245
 246                 return vmw_ldu_commit_list(dev_priv);
 247         }
 248
 249
 250         /* we now know we want to set a mode */
 251         mode = set->mode;
 252         fb = set->fb;
 253
 254         if (set->x + mode->hdisplay > fb->width ||
 255             set->y + mode->vdisplay > fb->height) {
 256                 DRM_ERROR("set outside of framebuffer\n");
 257                 return -EINVAL;
 258         }
 259
 260         vmw_fb_off(dev_priv);
 261
 262         crtc->fb = fb;
 263         encoder->crtc = crtc;
 264         connector->encoder = encoder;
 265         crtc->x = set->x;
 266         crtc->y = set->y;
 267         crtc->mode = *mode;
 268
 269         vmw_ldu_add_active(dev_priv, ldu, vfb);
 270
 271         return vmw_ldu_commit_list(dev_priv);
 272 }
 273
 274 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 275         .save = vmw_du_crtc_save,
 276         .restore = vmw_du_crtc_restore,
 277         .cursor_set = vmw_du_crtc_cursor_set,
 278         .cursor_move = vmw_du_crtc_cursor_move,
 279         .gamma_set = vmw_du_crtc_gamma_set,
 280         .destroy = vmw_ldu_crtc_destroy,
 281         .set_config = vmw_ldu_crtc_set_config,
 282 };
 283
 284
 285 /*
 286  * Legacy Display Unit encoder functions
 287  */
 288
 289 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 290 {
 291         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 292 }
 293
 294 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 295         .destroy = vmw_ldu_encoder_destroy,
 296 };
 297
 298 /*
 299  * Legacy Display Unit connector functions
 300  */
 301
 302 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 303 {
 304         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 305 }
 306
 307 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 308         .dpms = vmw_du_connector_dpms,
 309         .save = vmw_du_connector_save,
 310         .restore = vmw_du_connector_restore,
 311         .detect = vmw_du_connector_detect,
 312         .fill_modes = vmw_du_connector_fill_modes,
 313         .set_property = vmw_du_connector_set_property,
 314         .destroy = vmw_ldu_connector_destroy,
 315 };
 316
 317 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 318 {
 319         struct vmw_legacy_display_unit *ldu;
 320         struct drm_device *dev = dev_priv->dev;
 321         struct drm_connector *connector;
 322         struct drm_encoder *encoder;
 323         struct drm_crtc *crtc;
 324
 325         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 326         if (!ldu)
 327                 return -ENOMEM;
 328
 329         ldu->base.unit = unit;
 330         crtc = &ldu->base.crtc;
 331         encoder = &ldu->base.encoder;
 332         connector = &ldu->base.connector;
 333
 334         INIT_LIST_HEAD(&ldu->active);
 335
 336         ldu->base.pref_active = (unit == 0);
 337         ldu->base.pref_width = 800;
 338         ldu->base.pref_height = 600;
 339         ldu->base.pref_mode = NULL;
 340         ldu->base.is_implicit = true;
 341
 342         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 343                            DRM_MODE_CONNECTOR_VIRTUAL);
 344         connector->status = vmw_du_connector_detect(connector, true);
 345
 346         drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 347                          DRM_MODE_ENCODER_VIRTUAL);
 348         drm_mode_connector_attach_encoder(connector, encoder);
 349         encoder->possible_crtcs = (1 << unit);
 350         encoder->possible_clones = 0;
 351
 352         drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
 353
 354         drm_mode_crtc_set_gamma_size(crtc, 256);
 355
 356         drm_connector_attach_property(connector,
 357                                       dev->mode_config.dirty_info_property,
 358                                       1);
 359
 360         return 0;
 361 }
 362
 363 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
 364 {
 365         struct drm_device *dev = dev_priv->dev;
 366         int i, ret;
 367
 368         if (dev_priv->ldu_priv) {
 369                 DRM_INFO("ldu system already on\n");
 370                 return -EINVAL;
 371         }
 372
 373         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 374         if (!dev_priv->ldu_priv)
 375                 return -ENOMEM;
 376
 377         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 378         dev_priv->ldu_priv->num_active = 0;
 379         dev_priv->ldu_priv->last_num_active = 0;
 380         dev_priv->ldu_priv->fb = NULL;
 381
 382         /* for old hardware without multimon only enable one display */
 383         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 384                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 385         else
 386                 ret = drm_vblank_init(dev, 1);
 387         if (ret != 0)
 388                 goto err_free;
 389
 390         ret = drm_mode_create_dirty_info_property(dev);
 391         if (ret != 0)
 392                 goto err_vblank_cleanup;
 393
 394         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 395                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 396                         vmw_ldu_init(dev_priv, i);
 397         else
 398                 vmw_ldu_init(dev_priv, 0);
 399
 400         return 0;
 401
 402 err_vblank_cleanup:
 403         drm_vblank_cleanup(dev);
 404 err_free:
 405         kfree(dev_priv->ldu_priv);
 406         dev_priv->ldu_priv = NULL;
 407         return ret;
 408 }
 409
 410 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
 411 {
 412         struct drm_device *dev = dev_priv->dev;
 413
 414         if (!dev_priv->ldu_priv)
 415                 return -ENOSYS;
 416
 417         drm_vblank_cleanup(dev);
 418
 419         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 420
 421         kfree(dev_priv->ldu_priv);
 422
 423         return 0;
 424 }