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
 264                 vmw_ldu_del_active(dev_priv, ldu);
 265
 266                 return vmw_ldu_commit_list(dev_priv);
 267         }
 268
 269
 270         /* we now know we want to set a mode */
 271         mode = set->mode;
 272         fb = set->fb;
 273
 274         if (set->x + mode->hdisplay > fb->width ||
 275             set->y + mode->vdisplay > fb->height) {
 276                 DRM_ERROR("set outside of framebuffer\n");
 277                 return -EINVAL;
 278         }
 279
 280         vmw_fb_off(dev_priv);
 281
 282         crtc->fb = fb;
 283         encoder->crtc = crtc;
 284         connector->encoder = encoder;
 285         crtc->x = set->x;
 286         crtc->y = set->y;
 287         crtc->mode = *mode;
 288
 289         vmw_ldu_add_active(dev_priv, ldu, vfb);
 290
 291         return vmw_ldu_commit_list(dev_priv);
 292 }
 293
 294 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 295         .save = vmw_du_crtc_save,
 296         .restore = vmw_du_crtc_restore,
 297         .cursor_set = vmw_du_crtc_cursor_set,
 298         .cursor_move = vmw_du_crtc_cursor_move,
 299         .gamma_set = vmw_du_crtc_gamma_set,
 300         .destroy = vmw_ldu_crtc_destroy,
 301         .set_config = vmw_ldu_crtc_set_config,
 302 };
 303
 304
 305 /*
 306  * Legacy Display Unit encoder functions
 307  */
 308
 309 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 310 {
 311         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 312 }
 313
 314 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 315         .destroy = vmw_ldu_encoder_destroy,
 316 };
 317
 318 /*
 319  * Legacy Display Unit connector functions
 320  */
 321
 322 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 323 {
 324         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 325 }
 326
 327 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 328         .dpms = vmw_du_connector_dpms,
 329         .save = vmw_du_connector_save,
 330         .restore = vmw_du_connector_restore,
 331         .detect = vmw_du_connector_detect,
 332         .fill_modes = vmw_du_connector_fill_modes,
 333         .set_property = vmw_du_connector_set_property,
 334         .destroy = vmw_ldu_connector_destroy,
 335 };
 336
 337 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 338 {
 339         struct vmw_legacy_display_unit *ldu;
 340         struct drm_device *dev = dev_priv->dev;
 341         struct drm_connector *connector;
 342         struct drm_encoder *encoder;
 343         struct drm_crtc *crtc;
 344
 345         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 346         if (!ldu)
 347                 return -ENOMEM;
 348
 349         ldu->base.unit = unit;
 350         crtc = &ldu->base.crtc;
 351         encoder = &ldu->base.encoder;
 352         connector = &ldu->base.connector;
 353
 354         INIT_LIST_HEAD(&ldu->active);
 355
 356         ldu->base.pref_active = (unit == 0);
 357         ldu->base.pref_width = dev_priv->initial_width;
 358         ldu->base.pref_height = dev_priv->initial_height;
 359         ldu->base.pref_mode = NULL;
 360         ldu->base.is_implicit = true;
 361
 362         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 363                            DRM_MODE_CONNECTOR_VIRTUAL);
 364         connector->status = vmw_du_connector_detect(connector, true);
 365
 366         drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 367                          DRM_MODE_ENCODER_VIRTUAL);
 368         drm_mode_connector_attach_encoder(connector, encoder);
 369         encoder->possible_crtcs = (1 << unit);
 370         encoder->possible_clones = 0;
 371
 372         drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
 373
 374         drm_mode_crtc_set_gamma_size(crtc, 256);
 375
 376         drm_object_attach_property(&connector->base,
 377                                       dev->mode_config.dirty_info_property,
 378                                       1);
 379
 380         return 0;
 381 }
 382
 383 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
 384 {
 385         struct drm_device *dev = dev_priv->dev;
 386         int i, ret;
 387
 388         if (dev_priv->ldu_priv) {
 389                 DRM_INFO("ldu system already on\n");
 390                 return -EINVAL;
 391         }
 392
 393         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 394         if (!dev_priv->ldu_priv)
 395                 return -ENOMEM;
 396
 397         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 398         dev_priv->ldu_priv->num_active = 0;
 399         dev_priv->ldu_priv->last_num_active = 0;
 400         dev_priv->ldu_priv->fb = NULL;
 401
 402         /* for old hardware without multimon only enable one display */
 403         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 404                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 405         else
 406                 ret = drm_vblank_init(dev, 1);
 407         if (ret != 0)
 408                 goto err_free;
 409
 410         ret = drm_mode_create_dirty_info_property(dev);
 411         if (ret != 0)
 412                 goto err_vblank_cleanup;
 413
 414         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 415                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 416                         vmw_ldu_init(dev_priv, i);
 417         else
 418                 vmw_ldu_init(dev_priv, 0);
 419
 420         return 0;
 421
 422 err_vblank_cleanup:
 423         drm_vblank_cleanup(dev);
 424 err_free:
 425         kfree(dev_priv->ldu_priv);
 426         dev_priv->ldu_priv = NULL;
 427         return ret;
 428 }
 429
 430 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
 431 {
 432         struct drm_device *dev = dev_priv->dev;
 433
 434         if (!dev_priv->ldu_priv)
 435                 return -ENOSYS;
 436
 437         drm_vblank_cleanup(dev);
 438
 439         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 440
 441         kfree(dev_priv->ldu_priv);
 442
 443         return 0;
 444 }