Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 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 | |
| 29 | #include "drmP.h" |
| 30 | #include "vmwgfx_drv.h" |
| 31 | |
| 32 | #include "ttm/ttm_placement.h" |
| 33 | |
| 34 | #include "svga_overlay.h" |
| 35 | #include "svga_escape.h" |
| 36 | |
| 37 | #define VMW_MAX_NUM_STREAMS 1 |
| 38 | |
| 39 | struct vmw_stream { |
| 40 | struct vmw_dma_buffer *buf; |
| 41 | bool claimed; |
| 42 | bool paused; |
| 43 | struct drm_vmw_control_stream_arg saved; |
| 44 | }; |
| 45 | |
| 46 | /** |
| 47 | * Overlay control |
| 48 | */ |
| 49 | struct vmw_overlay { |
| 50 | /* |
| 51 | * Each stream is a single overlay. In Xv these are called ports. |
| 52 | */ |
| 53 | struct mutex mutex; |
| 54 | struct vmw_stream stream[VMW_MAX_NUM_STREAMS]; |
| 55 | }; |
| 56 | |
| 57 | static inline struct vmw_overlay *vmw_overlay(struct drm_device *dev) |
| 58 | { |
| 59 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 60 | return dev_priv ? dev_priv->overlay_priv : NULL; |
| 61 | } |
| 62 | |
| 63 | struct vmw_escape_header { |
| 64 | uint32_t cmd; |
| 65 | SVGAFifoCmdEscape body; |
| 66 | }; |
| 67 | |
| 68 | struct vmw_escape_video_flush { |
| 69 | struct vmw_escape_header escape; |
| 70 | SVGAEscapeVideoFlush flush; |
| 71 | }; |
| 72 | |
| 73 | static inline void fill_escape(struct vmw_escape_header *header, |
| 74 | uint32_t size) |
| 75 | { |
| 76 | header->cmd = SVGA_CMD_ESCAPE; |
| 77 | header->body.nsid = SVGA_ESCAPE_NSID_VMWARE; |
| 78 | header->body.size = size; |
| 79 | } |
| 80 | |
| 81 | static inline void fill_flush(struct vmw_escape_video_flush *cmd, |
| 82 | uint32_t stream_id) |
| 83 | { |
| 84 | fill_escape(&cmd->escape, sizeof(cmd->flush)); |
| 85 | cmd->flush.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_FLUSH; |
| 86 | cmd->flush.streamId = stream_id; |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Pin or unpin a buffer in vram. |
| 91 | * |
| 92 | * @dev_priv: Driver private. |
| 93 | * @buf: DMA buffer to pin or unpin. |
| 94 | * @pin: Pin buffer in vram if true. |
| 95 | * @interruptible: Use interruptible wait. |
| 96 | * |
| 97 | * Takes the current masters ttm lock in read. |
| 98 | * |
| 99 | * Returns |
| 100 | * -ERESTARTSYS if interrupted by a signal. |
| 101 | */ |
| 102 | static int vmw_dmabuf_pin_in_vram(struct vmw_private *dev_priv, |
| 103 | struct vmw_dma_buffer *buf, |
| 104 | bool pin, bool interruptible) |
| 105 | { |
| 106 | struct ttm_buffer_object *bo = &buf->base; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 107 | struct ttm_placement *overlay_placement = &vmw_vram_placement; |
| 108 | int ret; |
| 109 | |
| 110 | ret = ttm_read_lock(&dev_priv->active_master->lock, interruptible); |
| 111 | if (unlikely(ret != 0)) |
| 112 | return ret; |
| 113 | |
| 114 | ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
| 115 | if (unlikely(ret != 0)) |
| 116 | goto err; |
| 117 | |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 118 | if (pin) |
| 119 | overlay_placement = &vmw_vram_ne_placement; |
| 120 | |
Jerome Glisse | 9d87fa2 | 2010-04-07 10:21:19 +0000 | [diff] [blame] | 121 | ret = ttm_bo_validate(bo, overlay_placement, interruptible, false, false); |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 122 | |
| 123 | ttm_bo_unreserve(bo); |
| 124 | |
| 125 | err: |
| 126 | ttm_read_unlock(&dev_priv->active_master->lock); |
| 127 | |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Send put command to hw. |
| 133 | * |
| 134 | * Returns |
| 135 | * -ERESTARTSYS if interrupted by a signal. |
| 136 | */ |
| 137 | static int vmw_overlay_send_put(struct vmw_private *dev_priv, |
| 138 | struct vmw_dma_buffer *buf, |
| 139 | struct drm_vmw_control_stream_arg *arg, |
| 140 | bool interruptible) |
| 141 | { |
| 142 | struct { |
| 143 | struct vmw_escape_header escape; |
| 144 | struct { |
| 145 | struct { |
| 146 | uint32_t cmdType; |
| 147 | uint32_t streamId; |
| 148 | } header; |
| 149 | struct { |
| 150 | uint32_t registerId; |
| 151 | uint32_t value; |
| 152 | } items[SVGA_VIDEO_PITCH_3 + 1]; |
| 153 | } body; |
| 154 | struct vmw_escape_video_flush flush; |
| 155 | } *cmds; |
| 156 | uint32_t offset; |
| 157 | int i, ret; |
| 158 | |
| 159 | for (;;) { |
| 160 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); |
| 161 | if (cmds) |
| 162 | break; |
| 163 | |
| 164 | ret = vmw_fallback_wait(dev_priv, false, true, 0, |
| 165 | interruptible, 3*HZ); |
| 166 | if (interruptible && ret == -ERESTARTSYS) |
| 167 | return ret; |
| 168 | else |
| 169 | BUG_ON(ret != 0); |
| 170 | } |
| 171 | |
| 172 | fill_escape(&cmds->escape, sizeof(cmds->body)); |
| 173 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; |
| 174 | cmds->body.header.streamId = arg->stream_id; |
| 175 | |
| 176 | for (i = 0; i <= SVGA_VIDEO_PITCH_3; i++) |
| 177 | cmds->body.items[i].registerId = i; |
| 178 | |
| 179 | offset = buf->base.offset + arg->offset; |
| 180 | |
| 181 | cmds->body.items[SVGA_VIDEO_ENABLED].value = true; |
| 182 | cmds->body.items[SVGA_VIDEO_FLAGS].value = arg->flags; |
| 183 | cmds->body.items[SVGA_VIDEO_DATA_OFFSET].value = offset; |
| 184 | cmds->body.items[SVGA_VIDEO_FORMAT].value = arg->format; |
| 185 | cmds->body.items[SVGA_VIDEO_COLORKEY].value = arg->color_key; |
| 186 | cmds->body.items[SVGA_VIDEO_SIZE].value = arg->size; |
| 187 | cmds->body.items[SVGA_VIDEO_WIDTH].value = arg->width; |
| 188 | cmds->body.items[SVGA_VIDEO_HEIGHT].value = arg->height; |
| 189 | cmds->body.items[SVGA_VIDEO_SRC_X].value = arg->src.x; |
| 190 | cmds->body.items[SVGA_VIDEO_SRC_Y].value = arg->src.y; |
| 191 | cmds->body.items[SVGA_VIDEO_SRC_WIDTH].value = arg->src.w; |
| 192 | cmds->body.items[SVGA_VIDEO_SRC_HEIGHT].value = arg->src.h; |
| 193 | cmds->body.items[SVGA_VIDEO_DST_X].value = arg->dst.x; |
| 194 | cmds->body.items[SVGA_VIDEO_DST_Y].value = arg->dst.y; |
| 195 | cmds->body.items[SVGA_VIDEO_DST_WIDTH].value = arg->dst.w; |
| 196 | cmds->body.items[SVGA_VIDEO_DST_HEIGHT].value = arg->dst.h; |
| 197 | cmds->body.items[SVGA_VIDEO_PITCH_1].value = arg->pitch[0]; |
| 198 | cmds->body.items[SVGA_VIDEO_PITCH_2].value = arg->pitch[1]; |
| 199 | cmds->body.items[SVGA_VIDEO_PITCH_3].value = arg->pitch[2]; |
| 200 | |
| 201 | fill_flush(&cmds->flush, arg->stream_id); |
| 202 | |
| 203 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); |
| 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Send stop command to hw. |
| 210 | * |
| 211 | * Returns |
| 212 | * -ERESTARTSYS if interrupted by a signal. |
| 213 | */ |
| 214 | static int vmw_overlay_send_stop(struct vmw_private *dev_priv, |
| 215 | uint32_t stream_id, |
| 216 | bool interruptible) |
| 217 | { |
| 218 | struct { |
| 219 | struct vmw_escape_header escape; |
| 220 | SVGAEscapeVideoSetRegs body; |
| 221 | struct vmw_escape_video_flush flush; |
| 222 | } *cmds; |
| 223 | int ret; |
| 224 | |
| 225 | for (;;) { |
| 226 | cmds = vmw_fifo_reserve(dev_priv, sizeof(*cmds)); |
| 227 | if (cmds) |
| 228 | break; |
| 229 | |
| 230 | ret = vmw_fallback_wait(dev_priv, false, true, 0, |
| 231 | interruptible, 3*HZ); |
| 232 | if (interruptible && ret == -ERESTARTSYS) |
| 233 | return ret; |
| 234 | else |
| 235 | BUG_ON(ret != 0); |
| 236 | } |
| 237 | |
| 238 | fill_escape(&cmds->escape, sizeof(cmds->body)); |
| 239 | cmds->body.header.cmdType = SVGA_ESCAPE_VMWARE_VIDEO_SET_REGS; |
| 240 | cmds->body.header.streamId = stream_id; |
| 241 | cmds->body.items[0].registerId = SVGA_VIDEO_ENABLED; |
| 242 | cmds->body.items[0].value = false; |
| 243 | fill_flush(&cmds->flush, stream_id); |
| 244 | |
| 245 | vmw_fifo_commit(dev_priv, sizeof(*cmds)); |
| 246 | |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Stop or pause a stream. |
| 252 | * |
| 253 | * If the stream is paused the no evict flag is removed from the buffer |
| 254 | * but left in vram. This allows for instance mode_set to evict it |
| 255 | * should it need to. |
| 256 | * |
| 257 | * The caller must hold the overlay lock. |
| 258 | * |
| 259 | * @stream_id which stream to stop/pause. |
| 260 | * @pause true to pause, false to stop completely. |
| 261 | */ |
| 262 | static int vmw_overlay_stop(struct vmw_private *dev_priv, |
| 263 | uint32_t stream_id, bool pause, |
| 264 | bool interruptible) |
| 265 | { |
| 266 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 267 | struct vmw_stream *stream = &overlay->stream[stream_id]; |
| 268 | int ret; |
| 269 | |
| 270 | /* no buffer attached the stream is completely stopped */ |
| 271 | if (!stream->buf) |
| 272 | return 0; |
| 273 | |
| 274 | /* If the stream is paused this is already done */ |
| 275 | if (!stream->paused) { |
| 276 | ret = vmw_overlay_send_stop(dev_priv, stream_id, |
| 277 | interruptible); |
| 278 | if (ret) |
| 279 | return ret; |
| 280 | |
| 281 | /* We just remove the NO_EVICT flag so no -ENOMEM */ |
| 282 | ret = vmw_dmabuf_pin_in_vram(dev_priv, stream->buf, false, |
| 283 | interruptible); |
| 284 | if (interruptible && ret == -ERESTARTSYS) |
| 285 | return ret; |
| 286 | else |
| 287 | BUG_ON(ret != 0); |
| 288 | } |
| 289 | |
| 290 | if (!pause) { |
| 291 | vmw_dmabuf_unreference(&stream->buf); |
| 292 | stream->paused = false; |
| 293 | } else { |
| 294 | stream->paused = true; |
| 295 | } |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * Update a stream and send any put or stop fifo commands needed. |
| 302 | * |
| 303 | * The caller must hold the overlay lock. |
| 304 | * |
| 305 | * Returns |
| 306 | * -ENOMEM if buffer doesn't fit in vram. |
| 307 | * -ERESTARTSYS if interrupted. |
| 308 | */ |
| 309 | static int vmw_overlay_update_stream(struct vmw_private *dev_priv, |
| 310 | struct vmw_dma_buffer *buf, |
| 311 | struct drm_vmw_control_stream_arg *arg, |
| 312 | bool interruptible) |
| 313 | { |
| 314 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 315 | struct vmw_stream *stream = &overlay->stream[arg->stream_id]; |
| 316 | int ret = 0; |
| 317 | |
| 318 | if (!buf) |
| 319 | return -EINVAL; |
| 320 | |
| 321 | DRM_DEBUG(" %s: old %p, new %p, %spaused\n", __func__, |
| 322 | stream->buf, buf, stream->paused ? "" : "not "); |
| 323 | |
| 324 | if (stream->buf != buf) { |
| 325 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, |
| 326 | false, interruptible); |
| 327 | if (ret) |
| 328 | return ret; |
| 329 | } else if (!stream->paused) { |
| 330 | /* If the buffers match and not paused then just send |
| 331 | * the put command, no need to do anything else. |
| 332 | */ |
| 333 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); |
| 334 | if (ret == 0) |
| 335 | stream->saved = *arg; |
| 336 | else |
| 337 | BUG_ON(!interruptible); |
| 338 | |
| 339 | return ret; |
| 340 | } |
| 341 | |
| 342 | /* We don't start the old stream if we are interrupted. |
| 343 | * Might return -ENOMEM if it can't fit the buffer in vram. |
| 344 | */ |
| 345 | ret = vmw_dmabuf_pin_in_vram(dev_priv, buf, true, interruptible); |
| 346 | if (ret) |
| 347 | return ret; |
| 348 | |
| 349 | ret = vmw_overlay_send_put(dev_priv, buf, arg, interruptible); |
| 350 | if (ret) { |
| 351 | /* This one needs to happen no matter what. We only remove |
| 352 | * the NO_EVICT flag so this is safe from -ENOMEM. |
| 353 | */ |
| 354 | BUG_ON(vmw_dmabuf_pin_in_vram(dev_priv, buf, false, false) != 0); |
| 355 | return ret; |
| 356 | } |
| 357 | |
| 358 | if (stream->buf != buf) |
| 359 | stream->buf = vmw_dmabuf_reference(buf); |
| 360 | stream->saved = *arg; |
Jakob Bornecrantz | 792778e | 2010-05-28 11:22:04 +0200 | [diff] [blame] | 361 | /* stream is no longer stopped/paused */ |
| 362 | stream->paused = false; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 363 | |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * Stop all streams. |
| 369 | * |
| 370 | * Used by the fb code when starting. |
| 371 | * |
| 372 | * Takes the overlay lock. |
| 373 | */ |
| 374 | int vmw_overlay_stop_all(struct vmw_private *dev_priv) |
| 375 | { |
| 376 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 377 | int i, ret; |
| 378 | |
| 379 | if (!overlay) |
| 380 | return 0; |
| 381 | |
| 382 | mutex_lock(&overlay->mutex); |
| 383 | |
| 384 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 385 | struct vmw_stream *stream = &overlay->stream[i]; |
| 386 | if (!stream->buf) |
| 387 | continue; |
| 388 | |
| 389 | ret = vmw_overlay_stop(dev_priv, i, false, false); |
| 390 | WARN_ON(ret != 0); |
| 391 | } |
| 392 | |
| 393 | mutex_unlock(&overlay->mutex); |
| 394 | |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Try to resume all paused streams. |
| 400 | * |
| 401 | * Used by the kms code after moving a new scanout buffer to vram. |
| 402 | * |
| 403 | * Takes the overlay lock. |
| 404 | */ |
| 405 | int vmw_overlay_resume_all(struct vmw_private *dev_priv) |
| 406 | { |
| 407 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 408 | int i, ret; |
| 409 | |
| 410 | if (!overlay) |
| 411 | return 0; |
| 412 | |
| 413 | mutex_lock(&overlay->mutex); |
| 414 | |
| 415 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 416 | struct vmw_stream *stream = &overlay->stream[i]; |
| 417 | if (!stream->paused) |
| 418 | continue; |
| 419 | |
| 420 | ret = vmw_overlay_update_stream(dev_priv, stream->buf, |
| 421 | &stream->saved, false); |
| 422 | if (ret != 0) |
| 423 | DRM_INFO("%s: *warning* failed to resume stream %i\n", |
| 424 | __func__, i); |
| 425 | } |
| 426 | |
| 427 | mutex_unlock(&overlay->mutex); |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Pauses all active streams. |
| 434 | * |
| 435 | * Used by the kms code when moving a new scanout buffer to vram. |
| 436 | * |
| 437 | * Takes the overlay lock. |
| 438 | */ |
| 439 | int vmw_overlay_pause_all(struct vmw_private *dev_priv) |
| 440 | { |
| 441 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 442 | int i, ret; |
| 443 | |
| 444 | if (!overlay) |
| 445 | return 0; |
| 446 | |
| 447 | mutex_lock(&overlay->mutex); |
| 448 | |
| 449 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 450 | if (overlay->stream[i].paused) |
| 451 | DRM_INFO("%s: *warning* stream %i already paused\n", |
| 452 | __func__, i); |
| 453 | ret = vmw_overlay_stop(dev_priv, i, true, false); |
| 454 | WARN_ON(ret != 0); |
| 455 | } |
| 456 | |
| 457 | mutex_unlock(&overlay->mutex); |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | int vmw_overlay_ioctl(struct drm_device *dev, void *data, |
| 463 | struct drm_file *file_priv) |
| 464 | { |
| 465 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 466 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 467 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 468 | struct drm_vmw_control_stream_arg *arg = |
| 469 | (struct drm_vmw_control_stream_arg *)data; |
| 470 | struct vmw_dma_buffer *buf; |
| 471 | struct vmw_resource *res; |
| 472 | int ret; |
| 473 | |
| 474 | if (!overlay) |
| 475 | return -ENOSYS; |
| 476 | |
| 477 | ret = vmw_user_stream_lookup(dev_priv, tfile, &arg->stream_id, &res); |
| 478 | if (ret) |
| 479 | return ret; |
| 480 | |
| 481 | mutex_lock(&overlay->mutex); |
| 482 | |
| 483 | if (!arg->enabled) { |
| 484 | ret = vmw_overlay_stop(dev_priv, arg->stream_id, false, true); |
| 485 | goto out_unlock; |
| 486 | } |
| 487 | |
| 488 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &buf); |
| 489 | if (ret) |
| 490 | goto out_unlock; |
| 491 | |
| 492 | ret = vmw_overlay_update_stream(dev_priv, buf, arg, true); |
| 493 | |
| 494 | vmw_dmabuf_unreference(&buf); |
| 495 | |
| 496 | out_unlock: |
| 497 | mutex_unlock(&overlay->mutex); |
| 498 | vmw_resource_unreference(&res); |
| 499 | |
| 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | int vmw_overlay_num_overlays(struct vmw_private *dev_priv) |
| 504 | { |
| 505 | if (!dev_priv->overlay_priv) |
| 506 | return 0; |
| 507 | |
| 508 | return VMW_MAX_NUM_STREAMS; |
| 509 | } |
| 510 | |
| 511 | int vmw_overlay_num_free_overlays(struct vmw_private *dev_priv) |
| 512 | { |
| 513 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 514 | int i, k; |
| 515 | |
| 516 | if (!overlay) |
| 517 | return 0; |
| 518 | |
| 519 | mutex_lock(&overlay->mutex); |
| 520 | |
| 521 | for (i = 0, k = 0; i < VMW_MAX_NUM_STREAMS; i++) |
| 522 | if (!overlay->stream[i].claimed) |
| 523 | k++; |
| 524 | |
| 525 | mutex_unlock(&overlay->mutex); |
| 526 | |
| 527 | return k; |
| 528 | } |
| 529 | |
| 530 | int vmw_overlay_claim(struct vmw_private *dev_priv, uint32_t *out) |
| 531 | { |
| 532 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 533 | int i; |
| 534 | |
| 535 | if (!overlay) |
| 536 | return -ENOSYS; |
| 537 | |
| 538 | mutex_lock(&overlay->mutex); |
| 539 | |
| 540 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 541 | |
| 542 | if (overlay->stream[i].claimed) |
| 543 | continue; |
| 544 | |
| 545 | overlay->stream[i].claimed = true; |
| 546 | *out = i; |
| 547 | mutex_unlock(&overlay->mutex); |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | mutex_unlock(&overlay->mutex); |
| 552 | return -ESRCH; |
| 553 | } |
| 554 | |
| 555 | int vmw_overlay_unref(struct vmw_private *dev_priv, uint32_t stream_id) |
| 556 | { |
| 557 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 558 | |
| 559 | BUG_ON(stream_id >= VMW_MAX_NUM_STREAMS); |
| 560 | |
| 561 | if (!overlay) |
| 562 | return -ENOSYS; |
| 563 | |
| 564 | mutex_lock(&overlay->mutex); |
| 565 | |
| 566 | WARN_ON(!overlay->stream[stream_id].claimed); |
| 567 | vmw_overlay_stop(dev_priv, stream_id, false, false); |
| 568 | overlay->stream[stream_id].claimed = false; |
| 569 | |
| 570 | mutex_unlock(&overlay->mutex); |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | int vmw_overlay_init(struct vmw_private *dev_priv) |
| 575 | { |
| 576 | struct vmw_overlay *overlay; |
| 577 | int i; |
| 578 | |
| 579 | if (dev_priv->overlay_priv) |
| 580 | return -EINVAL; |
| 581 | |
| 582 | if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_VIDEO) && |
| 583 | (dev_priv->fifo.capabilities & SVGA_FIFO_CAP_ESCAPE)) { |
| 584 | DRM_INFO("hardware doesn't support overlays\n"); |
| 585 | return -ENOSYS; |
| 586 | } |
| 587 | |
| 588 | overlay = kmalloc(GFP_KERNEL, sizeof(*overlay)); |
| 589 | if (!overlay) |
| 590 | return -ENOMEM; |
| 591 | |
| 592 | memset(overlay, 0, sizeof(*overlay)); |
| 593 | mutex_init(&overlay->mutex); |
| 594 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 595 | overlay->stream[i].buf = NULL; |
| 596 | overlay->stream[i].paused = false; |
| 597 | overlay->stream[i].claimed = false; |
| 598 | } |
| 599 | |
| 600 | dev_priv->overlay_priv = overlay; |
| 601 | |
| 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | int vmw_overlay_close(struct vmw_private *dev_priv) |
| 606 | { |
| 607 | struct vmw_overlay *overlay = dev_priv->overlay_priv; |
| 608 | bool forgotten_buffer = false; |
| 609 | int i; |
| 610 | |
| 611 | if (!overlay) |
| 612 | return -ENOSYS; |
| 613 | |
| 614 | for (i = 0; i < VMW_MAX_NUM_STREAMS; i++) { |
| 615 | if (overlay->stream[i].buf) { |
| 616 | forgotten_buffer = true; |
| 617 | vmw_overlay_stop(dev_priv, i, false, false); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | WARN_ON(forgotten_buffer); |
| 622 | |
| 623 | dev_priv->overlay_priv = NULL; |
| 624 | kfree(overlay); |
| 625 | |
| 626 | return 0; |
| 627 | } |