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 vmw_display_unit *du = NULL;
  78         struct drm_framebuffer *fb = NULL;
  79         struct drm_crtc *crtc = NULL;
  80         int i = 0, ret;
  81
  82         /* If there is no display topology the host just assumes
  83          * that the guest will set the same layout as the host.
  84          */
  85         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
  86                 int w = 0, h = 0;
  87                 list_for_each_entry(entry, &lds->active, active) {
  88                         crtc = &entry->base.crtc;
  89                         w = max(w, crtc->x + crtc->mode.hdisplay);
  90                         h = max(h, crtc->y + crtc->mode.vdisplay);
  91                         i++;
  92                 }
  93
  94                 if (crtc == NULL)
  95                         return 0;
  96                 fb = entry->base.crtc.fb;
  97
  98                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
  99                                           fb->bits_per_pixel, fb->depth);
 100         }
 101
 102         if (!list_empty(&lds->active)) {
 103                 entry = list_entry(lds->active.next, typeof(*entry), active);
 104                 fb = entry->base.crtc.fb;
 105
 106                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 107                                    fb->bits_per_pixel, fb->depth);
 108         }
 109
 110         /* Make sure we always show something. */
 111         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 112                   lds->num_active ? lds->num_active : 1);
 113
 114         i = 0;
 115         list_for_each_entry(entry, &lds->active, active) {
 116                 crtc = &entry->base.crtc;
 117
 118                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 119                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 120                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 125
 126                 i++;
 127         }
 128
 129         BUG_ON(i != lds->num_active);
 130
 131         lds->last_num_active = lds->num_active;
 132
 133
 134         /* Find the first du with a cursor. */
 135         list_for_each_entry(entry, &lds->active, active) {
 136                 du = &entry->base;
 137
 138                 if (!du->cursor_dmabuf)
 139                         continue;
 140
 141                 ret = vmw_cursor_update_dmabuf(dev_priv,
 142                                                du->cursor_dmabuf,
 143                                                64, 64,
 144                                                du->hotspot_x,
 145                                                du->hotspot_y);
 146                 if (ret == 0)
 147                         break;
 148
 149                 DRM_ERROR("Could not update cursor image\n");
 150         }
 151
 152         return 0;
 153 }
 154
 155 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 156                               struct vmw_legacy_display_unit *ldu)
 157 {
 158         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 159         if (list_empty(&ldu->active))
 160                 return 0;
 161
 162         /* Must init otherwise list_empty(&ldu->active) will not work. */
 163         list_del_init(&ldu->active);
 164         if (--(ld->num_active) == 0) {
 165                 BUG_ON(!ld->fb);
 166                 if (ld->fb->unpin)
 167                         ld->fb->unpin(ld->fb);
 168                 ld->fb = NULL;
 169         }
 170
 171         return 0;
 172 }
 173
 174 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 175                               struct vmw_legacy_display_unit *ldu,
 176                               struct vmw_framebuffer *vfb)
 177 {
 178         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 179         struct vmw_legacy_display_unit *entry;
 180         struct list_head *at;
 181
 182         BUG_ON(!ld->num_active && ld->fb);
 183         if (vfb != ld->fb) {
 184                 if (ld->fb && ld->fb->unpin)
 185                         ld->fb->unpin(ld->fb);
 186                 if (vfb->pin)
 187                         vfb->pin(vfb);
 188                 ld->fb = vfb;
 189         }
 190
 191         if (!list_empty(&ldu->active))
 192                 return 0;
 193
 194         at = &ld->active;
 195         list_for_each_entry(entry, &ld->active, active) {
 196                 if (entry->base.unit > ldu->base.unit)
 197                         break;
 198
 199                 at = &entry->active;
 200         }
 201
 202         list_add(&ldu->active, at);
 203
 204         ld->num_active++;
 205
 206         return 0;
 207 }
 208
 209 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
 210 {
 211         struct vmw_private *dev_priv;
 212         struct vmw_legacy_display_unit *ldu;
 213         struct drm_connector *connector;
 214         struct drm_display_mode *mode;
 215         struct drm_encoder *encoder;
 216         struct vmw_framebuffer *vfb;
 217         struct drm_framebuffer *fb;
 218         struct drm_crtc *crtc;
 219
 220         if (!set)
 221                 return -EINVAL;
 222
 223         if (!set->crtc)
 224                 return -EINVAL;
 225
 226         /* get the ldu */
 227         crtc = set->crtc;
 228         ldu = vmw_crtc_to_ldu(crtc);
 229         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 230         dev_priv = vmw_priv(crtc->dev);
 231
 232         if (set->num_connectors > 1) {
 233                 DRM_ERROR("to many connectors\n");
 234                 return -EINVAL;
 235         }
 236
 237         if (set->num_connectors == 1 &&
 238             set->connectors[0] != &ldu->base.connector) {
 239                 DRM_ERROR("connector doesn't match %p %p\n",
 240                         set->connectors[0], &ldu->base.connector);
 241                 return -EINVAL;
 242         }
 243
 244         /* ldu only supports one fb active at the time */
 245         if (dev_priv->ldu_priv->fb && vfb &&
 246             !(dev_priv->ldu_priv->num_active == 1 &&
 247               !list_empty(&ldu->active)) &&
 248             dev_priv->ldu_priv->fb != vfb) {
 249                 DRM_ERROR("Multiple framebuffers not supported\n");
 250                 return -EINVAL;
 251         }
 252
 253         /* since they always map one to one these are safe */
 254         connector = &ldu->base.connector;
 255         encoder = &ldu->base.encoder;
 256
 257         /* should we turn the crtc off? */
 258         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 259
 260                 connector->encoder = NULL;
 261                 encoder->crtc = NULL;
 262                 crtc->fb = NULL;
 263                 crtc->enabled = false;
 264
 265                 vmw_ldu_del_active(dev_priv, ldu);
 266
 267                 return vmw_ldu_commit_list(dev_priv);
 268         }
 269
 270
 271         /* we now know we want to set a mode */
 272         mode = set->mode;
 273         fb = set->fb;
 274
 275         if (set->x + mode->hdisplay > fb->width ||
 276             set->y + mode->vdisplay > fb->height) {
 277                 DRM_ERROR("set outside of framebuffer\n");
 278                 return -EINVAL;
 279         }
 280
 281         vmw_fb_off(dev_priv);
 282
 283         crtc->fb = fb;
 284         encoder->crtc = crtc;
 285         connector->encoder = encoder;
 286         crtc->x = set->x;
 287         crtc->y = set->y;
 288         crtc->mode = *mode;
 289         crtc->enabled = true;
 290
 291         vmw_ldu_add_active(dev_priv, ldu, vfb);
 292
 293         return vmw_ldu_commit_list(dev_priv);
 294 }
 295
 296 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 297         .save = vmw_du_crtc_save,
 298         .restore = vmw_du_crtc_restore,
 299         .cursor_set = vmw_du_crtc_cursor_set,
 300         .cursor_move = vmw_du_crtc_cursor_move,
 301         .gamma_set = vmw_du_crtc_gamma_set,
 302         .destroy = vmw_ldu_crtc_destroy,
 303         .set_config = vmw_ldu_crtc_set_config,
 304 };
 305
 306
 307 /*
 308  * Legacy Display Unit encoder functions
 309  */
 310
 311 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 312 {
 313         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 314 }
 315
 316 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 317         .destroy = vmw_ldu_encoder_destroy,
 318 };
 319
 320 /*
 321  * Legacy Display Unit connector functions
 322  */
 323
 324 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 325 {
 326         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 327 }
 328
 329 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 330         .dpms = vmw_du_connector_dpms,
 331         .save = vmw_du_connector_save,
 332         .restore = vmw_du_connector_restore,
 333         .detect = vmw_du_connector_detect,
 334         .fill_modes = vmw_du_connector_fill_modes,
 335         .set_property = vmw_du_connector_set_property,
 336         .destroy = vmw_ldu_connector_destroy,
 337 };
 338
 339 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 340 {
 341         struct vmw_legacy_display_unit *ldu;
 342         struct drm_device *dev = dev_priv->dev;
 343         struct drm_connector *connector;
 344         struct drm_encoder *encoder;
 345         struct drm_crtc *crtc;
 346
 347         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 348         if (!ldu)
 349                 return -ENOMEM;
 350
 351         ldu->base.unit = unit;
 352         crtc = &ldu->base.crtc;
 353         encoder = &ldu->base.encoder;
 354         connector = &ldu->base.connector;
 355
 356         INIT_LIST_HEAD(&ldu->active);
 357
 358         ldu->base.pref_active = (unit == 0);
 359         ldu->base.pref_width = dev_priv->initial_width;
 360         ldu->base.pref_height = dev_priv->initial_height;
 361         ldu->base.pref_mode = NULL;
 362         ldu->base.is_implicit = true;
 363
 364         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 365                            DRM_MODE_CONNECTOR_VIRTUAL);
 366         connector->status = vmw_du_connector_detect(connector, true);
 367
 368         drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 369                          DRM_MODE_ENCODER_VIRTUAL);
 370         drm_mode_connector_attach_encoder(connector, encoder);
 371         encoder->possible_crtcs = (1 << unit);
 372         encoder->possible_clones = 0;
 373
 374         (void) drm_sysfs_connector_add(connector);
 375
 376         drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
 377
 378         drm_mode_crtc_set_gamma_size(crtc, 256);
 379
 380         drm_object_attach_property(&connector->base,
 381                                       dev->mode_config.dirty_info_property,
 382                                       1);
 383
 384         return 0;
 385 }
 386
 387 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
 388 {
 389         struct drm_device *dev = dev_priv->dev;
 390         int i, ret;
 391
 392         if (dev_priv->ldu_priv) {
 393                 DRM_INFO("ldu system already on\n");
 394                 return -EINVAL;
 395         }
 396
 397         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 398         if (!dev_priv->ldu_priv)
 399                 return -ENOMEM;
 400
 401         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 402         dev_priv->ldu_priv->num_active = 0;
 403         dev_priv->ldu_priv->last_num_active = 0;
 404         dev_priv->ldu_priv->fb = NULL;
 405
 406         /* for old hardware without multimon only enable one display */
 407         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 408                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 409         else
 410                 ret = drm_vblank_init(dev, 1);
 411         if (ret != 0)
 412                 goto err_free;
 413
 414         ret = drm_mode_create_dirty_info_property(dev);
 415         if (ret != 0)
 416                 goto err_vblank_cleanup;
 417
 418         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 419                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 420                         vmw_ldu_init(dev_priv, i);
 421         else
 422                 vmw_ldu_init(dev_priv, 0);
 423
 424         return 0;
 425
 426 err_vblank_cleanup:
 427         drm_vblank_cleanup(dev);
 428 err_free:
 429         kfree(dev_priv->ldu_priv);
 430         dev_priv->ldu_priv = NULL;
 431         return ret;
 432 }
 433
 434 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
 435 {
 436         struct drm_device *dev = dev_priv->dev;
 437
 438         if (!dev_priv->ldu_priv)
 439                 return -ENOSYS;
 440
 441         drm_vblank_cleanup(dev);
 442
 443         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 444
 445         kfree(dev_priv->ldu_priv);
 446
 447         return 0;
 448 }