kernel/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 #include <drm/drm_plane_helper.h>
  30
  31
  32 #define vmw_crtc_to_ldu(x) \
  33         container_of(x, struct vmw_legacy_display_unit, base.crtc)
  34 #define vmw_encoder_to_ldu(x) \
  35         container_of(x, struct vmw_legacy_display_unit, base.encoder)
  36 #define vmw_connector_to_ldu(x) \
  37         container_of(x, struct vmw_legacy_display_unit, base.connector)
  38
  39 struct vmw_legacy_display {
  40         struct list_head active;
  41
  42         unsigned num_active;
  43         unsigned last_num_active;
  44
  45         struct vmw_framebuffer *fb;
  46 };
  47
  48 /**
  49  * Display unit using the legacy register interface.
  50  */
  51 struct vmw_legacy_display_unit {
  52         struct vmw_display_unit base;
  53
  54         struct list_head active;
  55 };
  56
  57 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
  58 {
  59         list_del_init(&ldu->active);
  60         vmw_display_unit_cleanup(&ldu->base);
  61         kfree(ldu);
  62 }
  63
  64
  65 /*
  66  * Legacy Display Unit CRTC functions
  67  */
  68
  69 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
  70 {
  71         vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
  72 }
  73
  74 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
  75 {
  76         struct vmw_legacy_display *lds = dev_priv->ldu_priv;
  77         struct vmw_legacy_display_unit *entry;
  78         struct vmw_display_unit *du = NULL;
  79         struct drm_framebuffer *fb = NULL;
  80         struct drm_crtc *crtc = NULL;
  81         int i = 0, ret;
  82
  83         /* If there is no display topology the host just assumes
  84          * that the guest will set the same layout as the host.
  85          */
  86         if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
  87                 int w = 0, h = 0;
  88                 list_for_each_entry(entry, &lds->active, active) {
  89                         crtc = &entry->base.crtc;
  90                         w = max(w, crtc->x + crtc->mode.hdisplay);
  91                         h = max(h, crtc->y + crtc->mode.vdisplay);
  92                         i++;
  93                 }
  94
  95                 if (crtc == NULL)
  96                         return 0;
  97                 fb = entry->base.crtc.primary->fb;
  98
  99                 return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
 100                                           fb->bits_per_pixel, fb->depth);
 101         }
 102
 103         if (!list_empty(&lds->active)) {
 104                 entry = list_entry(lds->active.next, typeof(*entry), active);
 105                 fb = entry->base.crtc.primary->fb;
 106
 107                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 108                                    fb->bits_per_pixel, fb->depth);
 109         }
 110
 111         /* Make sure we always show something. */
 112         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 113                   lds->num_active ? lds->num_active : 1);
 114
 115         i = 0;
 116         list_for_each_entry(entry, &lds->active, active) {
 117                 crtc = &entry->base.crtc;
 118
 119                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 120                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 125                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 126
 127                 i++;
 128         }
 129
 130         BUG_ON(i != lds->num_active);
 131
 132         lds->last_num_active = lds->num_active;
 133
 134
 135         /* Find the first du with a cursor. */
 136         list_for_each_entry(entry, &lds->active, active) {
 137                 du = &entry->base;
 138
 139                 if (!du->cursor_dmabuf)
 140                         continue;
 141
 142                 ret = vmw_cursor_update_dmabuf(dev_priv,
 143                                                du->cursor_dmabuf,
 144                                                64, 64,
 145                                                du->hotspot_x,
 146                                                du->hotspot_y);
 147                 if (ret == 0)
 148                         break;
 149
 150                 DRM_ERROR("Could not update cursor image\n");
 151         }
 152
 153         return 0;
 154 }
 155
 156 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 157                               struct vmw_legacy_display_unit *ldu)
 158 {
 159         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 160         if (list_empty(&ldu->active))
 161                 return 0;
 162
 163         /* Must init otherwise list_empty(&ldu->active) will not work. */
 164         list_del_init(&ldu->active);
 165         if (--(ld->num_active) == 0) {
 166                 BUG_ON(!ld->fb);
 167                 if (ld->fb->unpin)
 168                         ld->fb->unpin(ld->fb);
 169                 ld->fb = NULL;
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 176                               struct vmw_legacy_display_unit *ldu,
 177                               struct vmw_framebuffer *vfb)
 178 {
 179         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 180         struct vmw_legacy_display_unit *entry;
 181         struct list_head *at;
 182
 183         BUG_ON(!ld->num_active && ld->fb);
 184         if (vfb != ld->fb) {
 185                 if (ld->fb && ld->fb->unpin)
 186                         ld->fb->unpin(ld->fb);
 187                 if (vfb->pin)
 188                         vfb->pin(vfb);
 189                 ld->fb = vfb;
 190         }
 191
 192         if (!list_empty(&ldu->active))
 193                 return 0;
 194
 195         at = &ld->active;
 196         list_for_each_entry(entry, &ld->active, active) {
 197                 if (entry->base.unit > ldu->base.unit)
 198                         break;
 199
 200                 at = &entry->active;
 201         }
 202
 203         list_add(&ldu->active, at);
 204
 205         ld->num_active++;
 206
 207         return 0;
 208 }
 209
 210 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
 211 {
 212         struct vmw_private *dev_priv;
 213         struct vmw_legacy_display_unit *ldu;
 214         struct drm_connector *connector;
 215         struct drm_display_mode *mode;
 216         struct drm_encoder *encoder;
 217         struct vmw_framebuffer *vfb;
 218         struct drm_framebuffer *fb;
 219         struct drm_crtc *crtc;
 220
 221         if (!set)
 222                 return -EINVAL;
 223
 224         if (!set->crtc)
 225                 return -EINVAL;
 226
 227         /* get the ldu */
 228         crtc = set->crtc;
 229         ldu = vmw_crtc_to_ldu(crtc);
 230         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 231         dev_priv = vmw_priv(crtc->dev);
 232
 233         if (set->num_connectors > 1) {
 234                 DRM_ERROR("to many connectors\n");
 235                 return -EINVAL;
 236         }
 237
 238         if (set->num_connectors == 1 &&
 239             set->connectors[0] != &ldu->base.connector) {
 240                 DRM_ERROR("connector doesn't match %p %p\n",
 241                         set->connectors[0], &ldu->base.connector);
 242                 return -EINVAL;
 243         }
 244
 245         /* ldu only supports one fb active at the time */
 246         if (dev_priv->ldu_priv->fb && vfb &&
 247             !(dev_priv->ldu_priv->num_active == 1 &&
 248               !list_empty(&ldu->active)) &&
 249             dev_priv->ldu_priv->fb != vfb) {
 250                 DRM_ERROR("Multiple framebuffers not supported\n");
 251                 return -EINVAL;
 252         }
 253
 254         /* since they always map one to one these are safe */
 255         connector = &ldu->base.connector;
 256         encoder = &ldu->base.encoder;
 257
 258         /* should we turn the crtc off? */
 259         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 260
 261                 connector->encoder = NULL;
 262                 encoder->crtc = NULL;
 263                 crtc->primary->fb = NULL;
 264                 crtc->enabled = false;
 265
 266                 vmw_ldu_del_active(dev_priv, ldu);
 267
 268                 return vmw_ldu_commit_list(dev_priv);
 269         }
 270
 271
 272         /* we now know we want to set a mode */
 273         mode = set->mode;
 274         fb = set->fb;
 275
 276         if (set->x + mode->hdisplay > fb->width ||
 277             set->y + mode->vdisplay > fb->height) {
 278                 DRM_ERROR("set outside of framebuffer\n");
 279                 return -EINVAL;
 280         }
 281
 282         vmw_fb_off(dev_priv);
 283
 284         crtc->primary->fb = fb;
 285         encoder->crtc = crtc;
 286         connector->encoder = encoder;
 287         crtc->x = set->x;
 288         crtc->y = set->y;
 289         crtc->mode = *mode;
 290         crtc->enabled = true;
 291
 292         vmw_ldu_add_active(dev_priv, ldu, vfb);
 293
 294         return vmw_ldu_commit_list(dev_priv);
 295 }
 296
 297 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 298         .save = vmw_du_crtc_save,
 299         .restore = vmw_du_crtc_restore,
 300         .cursor_set = vmw_du_crtc_cursor_set,
 301         .cursor_move = vmw_du_crtc_cursor_move,
 302         .gamma_set = vmw_du_crtc_gamma_set,
 303         .destroy = vmw_ldu_crtc_destroy,
 304         .set_config = vmw_ldu_crtc_set_config,
 305 };
 306
 307
 308 /*
 309  * Legacy Display Unit encoder functions
 310  */
 311
 312 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 313 {
 314         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 315 }
 316
 317 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 318         .destroy = vmw_ldu_encoder_destroy,
 319 };
 320
 321 /*
 322  * Legacy Display Unit connector functions
 323  */
 324
 325 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 326 {
 327         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 328 }
 329
 330 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
 331         .dpms = vmw_du_connector_dpms,
 332         .save = vmw_du_connector_save,
 333         .restore = vmw_du_connector_restore,
 334         .detect = vmw_du_connector_detect,
 335         .fill_modes = vmw_du_connector_fill_modes,
 336         .set_property = vmw_du_connector_set_property,
 337         .destroy = vmw_ldu_connector_destroy,
 338 };
 339
 340 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
 341 {
 342         struct vmw_legacy_display_unit *ldu;
 343         struct drm_device *dev = dev_priv->dev;
 344         struct drm_connector *connector;
 345         struct drm_encoder *encoder;
 346         struct drm_crtc *crtc;
 347
 348         ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
 349         if (!ldu)
 350                 return -ENOMEM;
 351
 352         ldu->base.unit = unit;
 353         crtc = &ldu->base.crtc;
 354         encoder = &ldu->base.encoder;
 355         connector = &ldu->base.connector;
 356
 357         INIT_LIST_HEAD(&ldu->active);
 358
 359         ldu->base.pref_active = (unit == 0);
 360         ldu->base.pref_width = dev_priv->initial_width;
 361         ldu->base.pref_height = dev_priv->initial_height;
 362         ldu->base.pref_mode = NULL;
 363         ldu->base.is_implicit = true;
 364
 365         drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
 366                            DRM_MODE_CONNECTOR_VIRTUAL);
 367         connector->status = vmw_du_connector_detect(connector, true);
 368
 369         drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
 370                          DRM_MODE_ENCODER_VIRTUAL);
 371         drm_mode_connector_attach_encoder(connector, encoder);
 372         encoder->possible_crtcs = (1 << unit);
 373         encoder->possible_clones = 0;
 374
 375         (void) drm_connector_register(connector);
 376
 377         drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
 378
 379         drm_mode_crtc_set_gamma_size(crtc, 256);
 380
 381         drm_object_attach_property(&connector->base,
 382                                       dev->mode_config.dirty_info_property,
 383                                       1);
 384
 385         return 0;
 386 }
 387
 388 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
 389 {
 390         struct drm_device *dev = dev_priv->dev;
 391         int i, ret;
 392
 393         if (dev_priv->ldu_priv) {
 394                 DRM_INFO("ldu system already on\n");
 395                 return -EINVAL;
 396         }
 397
 398         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 399         if (!dev_priv->ldu_priv)
 400                 return -ENOMEM;
 401
 402         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 403         dev_priv->ldu_priv->num_active = 0;
 404         dev_priv->ldu_priv->last_num_active = 0;
 405         dev_priv->ldu_priv->fb = NULL;
 406
 407         /* for old hardware without multimon only enable one display */
 408         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 409                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 410         else
 411                 ret = drm_vblank_init(dev, 1);
 412         if (ret != 0)
 413                 goto err_free;
 414
 415         ret = drm_mode_create_dirty_info_property(dev);
 416         if (ret != 0)
 417                 goto err_vblank_cleanup;
 418
 419         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 420                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 421                         vmw_ldu_init(dev_priv, i);
 422         else
 423                 vmw_ldu_init(dev_priv, 0);
 424
 425         return 0;
 426
 427 err_vblank_cleanup:
 428         drm_vblank_cleanup(dev);
 429 err_free:
 430         kfree(dev_priv->ldu_priv);
 431         dev_priv->ldu_priv = NULL;
 432         return ret;
 433 }
 434
 435 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
 436 {
 437         struct drm_device *dev = dev_priv->dev;
 438
 439         if (!dev_priv->ldu_priv)
 440                 return -ENOSYS;
 441
 442         drm_vblank_cleanup(dev);
 443
 444         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 445
 446         kfree(dev_priv->ldu_priv);
 447
 448         return 0;
 449 }