drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2015 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_du_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->format->cpp[0] * 8,
 101                                           fb->format->depth);
 102         }
 103
 104         if (!list_empty(&lds->active)) {
 105                 entry = list_entry(lds->active.next, typeof(*entry), active);
 106                 fb = entry->base.crtc.primary->fb;
 107
 108                 vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
 109                                    fb->format->cpp[0] * 8, fb->format->depth);
 110         }
 111
 112         /* Make sure we always show something. */
 113         vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
 114                   lds->num_active ? lds->num_active : 1);
 115
 116         i = 0;
 117         list_for_each_entry(entry, &lds->active, active) {
 118                 crtc = &entry->base.crtc;
 119
 120                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
 121                 vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
 122                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
 123                 vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
 124                 vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
 125                 vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
 126                 vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
 127
 128                 i++;
 129         }
 130
 131         BUG_ON(i != lds->num_active);
 132
 133         lds->last_num_active = lds->num_active;
 134
 135
 136         /* Find the first du with a cursor. */
 137         list_for_each_entry(entry, &lds->active, active) {
 138                 du = &entry->base;
 139
 140                 if (!du->cursor_dmabuf)
 141                         continue;
 142
 143                 ret = vmw_cursor_update_dmabuf(dev_priv,
 144                                                du->cursor_dmabuf,
 145                                                64, 64,
 146                                                du->hotspot_x,
 147                                                du->hotspot_y);
 148                 if (ret == 0)
 149                         break;
 150
 151                 DRM_ERROR("Could not update cursor image\n");
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
 158                               struct vmw_legacy_display_unit *ldu)
 159 {
 160         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 161         if (list_empty(&ldu->active))
 162                 return 0;
 163
 164         /* Must init otherwise list_empty(&ldu->active) will not work. */
 165         list_del_init(&ldu->active);
 166         if (--(ld->num_active) == 0) {
 167                 BUG_ON(!ld->fb);
 168                 if (ld->fb->unpin)
 169                         ld->fb->unpin(ld->fb);
 170                 ld->fb = NULL;
 171         }
 172
 173         return 0;
 174 }
 175
 176 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
 177                               struct vmw_legacy_display_unit *ldu,
 178                               struct vmw_framebuffer *vfb)
 179 {
 180         struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
 181         struct vmw_legacy_display_unit *entry;
 182         struct list_head *at;
 183
 184         BUG_ON(!ld->num_active && ld->fb);
 185         if (vfb != ld->fb) {
 186                 if (ld->fb && ld->fb->unpin)
 187                         ld->fb->unpin(ld->fb);
 188                 if (vfb->pin)
 189                         vfb->pin(vfb);
 190                 ld->fb = vfb;
 191         }
 192
 193         if (!list_empty(&ldu->active))
 194                 return 0;
 195
 196         at = &ld->active;
 197         list_for_each_entry(entry, &ld->active, active) {
 198                 if (entry->base.unit > ldu->base.unit)
 199                         break;
 200
 201                 at = &entry->active;
 202         }
 203
 204         list_add(&ldu->active, at);
 205
 206         ld->num_active++;
 207
 208         return 0;
 209 }
 210
 211 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set,
 212                                    struct drm_modeset_acquire_ctx *ctx)
 213 {
 214         struct vmw_private *dev_priv;
 215         struct vmw_legacy_display_unit *ldu;
 216         struct drm_connector *connector;
 217         struct drm_display_mode *mode;
 218         struct drm_encoder *encoder;
 219         struct vmw_framebuffer *vfb;
 220         struct drm_framebuffer *fb;
 221         struct drm_crtc *crtc;
 222
 223         if (!set)
 224                 return -EINVAL;
 225
 226         if (!set->crtc)
 227                 return -EINVAL;
 228
 229         /* get the ldu */
 230         crtc = set->crtc;
 231         ldu = vmw_crtc_to_ldu(crtc);
 232         vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
 233         dev_priv = vmw_priv(crtc->dev);
 234
 235         if (set->num_connectors > 1) {
 236                 DRM_ERROR("to many connectors\n");
 237                 return -EINVAL;
 238         }
 239
 240         if (set->num_connectors == 1 &&
 241             set->connectors[0] != &ldu->base.connector) {
 242                 DRM_ERROR("connector doesn't match %p %p\n",
 243                         set->connectors[0], &ldu->base.connector);
 244                 return -EINVAL;
 245         }
 246
 247         /* ldu only supports one fb active at the time */
 248         if (dev_priv->ldu_priv->fb && vfb &&
 249             !(dev_priv->ldu_priv->num_active == 1 &&
 250               !list_empty(&ldu->active)) &&
 251             dev_priv->ldu_priv->fb != vfb) {
 252                 DRM_ERROR("Multiple framebuffers not supported\n");
 253                 return -EINVAL;
 254         }
 255
 256         /* since they always map one to one these are safe */
 257         connector = &ldu->base.connector;
 258         encoder = &ldu->base.encoder;
 259
 260         /* should we turn the crtc off? */
 261         if (set->num_connectors == 0 || !set->mode || !set->fb) {
 262
 263                 connector->encoder = NULL;
 264                 encoder->crtc = NULL;
 265                 crtc->primary->fb = NULL;
 266                 crtc->enabled = false;
 267
 268                 vmw_ldu_del_active(dev_priv, ldu);
 269
 270                 return vmw_ldu_commit_list(dev_priv);
 271         }
 272
 273
 274         /* we now know we want to set a mode */
 275         mode = set->mode;
 276         fb = set->fb;
 277
 278         if (set->x + mode->hdisplay > fb->width ||
 279             set->y + mode->vdisplay > fb->height) {
 280                 DRM_ERROR("set outside of framebuffer\n");
 281                 return -EINVAL;
 282         }
 283
 284         vmw_svga_enable(dev_priv);
 285
 286         crtc->primary->fb = fb;
 287         encoder->crtc = crtc;
 288         connector->encoder = encoder;
 289         crtc->x = set->x;
 290         crtc->y = set->y;
 291         crtc->mode = *mode;
 292         crtc->enabled = true;
 293         ldu->base.set_gui_x = set->x;
 294         ldu->base.set_gui_y = set->y;
 295
 296         vmw_ldu_add_active(dev_priv, ldu, vfb);
 297
 298         return vmw_ldu_commit_list(dev_priv);
 299 }
 300
 301 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
 302         .cursor_set2 = vmw_du_crtc_cursor_set2,
 303         .cursor_move = vmw_du_crtc_cursor_move,
 304         .gamma_set = vmw_du_crtc_gamma_set,
 305         .destroy = vmw_ldu_crtc_destroy,
 306         .set_config = vmw_ldu_crtc_set_config,
 307 };
 308
 309
 310 /*
 311  * Legacy Display Unit encoder functions
 312  */
 313
 314 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
 315 {
 316         vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
 317 }
 318
 319 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
 320         .destroy = vmw_ldu_encoder_destroy,
 321 };
 322
 323 /*
 324  * Legacy Display Unit connector functions
 325  */
 326
 327 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
 328 {
 329         vmw_ldu_destroy(vmw_connector_to_ldu(connector));
 330 }
 331
 332 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
 333         .dpms = vmw_du_connector_dpms,
 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, NULL);
 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_priv->hotplug_mode_update_property, 1);
 383         drm_object_attach_property(&connector->base,
 384                                    dev->mode_config.suggested_x_property, 0);
 385         drm_object_attach_property(&connector->base,
 386                                    dev->mode_config.suggested_y_property, 0);
 387         if (dev_priv->implicit_placement_property)
 388                 drm_object_attach_property
 389                         (&connector->base,
 390                          dev_priv->implicit_placement_property,
 391                          1);
 392
 393         return 0;
 394 }
 395
 396 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
 397 {
 398         struct drm_device *dev = dev_priv->dev;
 399         int i, ret;
 400
 401         if (dev_priv->ldu_priv) {
 402                 DRM_INFO("ldu system already on\n");
 403                 return -EINVAL;
 404         }
 405
 406         dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
 407         if (!dev_priv->ldu_priv)
 408                 return -ENOMEM;
 409
 410         INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
 411         dev_priv->ldu_priv->num_active = 0;
 412         dev_priv->ldu_priv->last_num_active = 0;
 413         dev_priv->ldu_priv->fb = NULL;
 414
 415         /* for old hardware without multimon only enable one display */
 416         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 417                 ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
 418         else
 419                 ret = drm_vblank_init(dev, 1);
 420         if (ret != 0)
 421                 goto err_free;
 422
 423         vmw_kms_create_implicit_placement_property(dev_priv, true);
 424
 425         if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
 426                 for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
 427                         vmw_ldu_init(dev_priv, i);
 428         else
 429                 vmw_ldu_init(dev_priv, 0);
 430
 431         dev_priv->active_display_unit = vmw_du_legacy;
 432
 433         DRM_INFO("Legacy Display Unit initialized\n");
 434
 435         return 0;
 436
 437 err_free:
 438         kfree(dev_priv->ldu_priv);
 439         dev_priv->ldu_priv = NULL;
 440         return ret;
 441 }
 442
 443 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 444 {
 445         struct drm_device *dev = dev_priv->dev;
 446
 447         if (!dev_priv->ldu_priv)
 448                 return -ENOSYS;
 449
 450         drm_vblank_cleanup(dev);
 451
 452         BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 453
 454         kfree(dev_priv->ldu_priv);
 455
 456         return 0;
 457 }
 458
 459
 460 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv,
 461                                 struct vmw_framebuffer *framebuffer,
 462                                 unsigned flags, unsigned color,
 463                                 struct drm_clip_rect *clips,
 464                                 unsigned num_clips, int increment)
 465 {
 466         size_t fifo_size;
 467         int i;
 468
 469         struct {
 470                 uint32_t header;
 471                 SVGAFifoCmdUpdate body;
 472         } *cmd;
 473
 474         fifo_size = sizeof(*cmd) * num_clips;
 475         cmd = vmw_fifo_reserve(dev_priv, fifo_size);
 476         if (unlikely(cmd == NULL)) {
 477                 DRM_ERROR("Fifo reserve failed.\n");
 478                 return -ENOMEM;
 479         }
 480
 481         memset(cmd, 0, fifo_size);
 482         for (i = 0; i < num_clips; i++, clips += increment) {
 483                 cmd[i].header = SVGA_CMD_UPDATE;
 484                 cmd[i].body.x = clips->x1;
 485                 cmd[i].body.y = clips->y1;
 486                 cmd[i].body.width = clips->x2 - clips->x1;
 487                 cmd[i].body.height = clips->y2 - clips->y1;
 488         }
 489
 490         vmw_fifo_commit(dev_priv, fifo_size);
 491         return 0;
 492 }