1 /* 2 * Copyright (C) 2012 Samsung Electronics Co.Ltd 3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundationr 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/clk.h> 13 #include <linux/err.h> 14 #include <linux/interrupt.h> 15 #include <linux/io.h> 16 #include <linux/platform_device.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/slab.h> 19 #include <linux/workqueue.h> 20 #include <linux/dma-mapping.h> 21 #include <linux/dma-attrs.h> 22 23 #include <drm/drmP.h> 24 #include <drm/exynos_drm.h> 25 #include "exynos_drm_drv.h" 26 #include "exynos_drm_gem.h" 27 #include "exynos_drm_iommu.h" 28 29 #define G2D_HW_MAJOR_VER 4 30 #define G2D_HW_MINOR_VER 1 31 32 /* vaild register range set from user: 0x0104 ~ 0x0880 */ 33 #define G2D_VALID_START 0x0104 34 #define G2D_VALID_END 0x0880 35 36 /* general registers */ 37 #define G2D_SOFT_RESET 0x0000 38 #define G2D_INTEN 0x0004 39 #define G2D_INTC_PEND 0x000C 40 #define G2D_DMA_SFR_BASE_ADDR 0x0080 41 #define G2D_DMA_COMMAND 0x0084 42 #define G2D_DMA_STATUS 0x008C 43 #define G2D_DMA_HOLD_CMD 0x0090 44 45 /* command registers */ 46 #define G2D_BITBLT_START 0x0100 47 48 /* registers for base address */ 49 #define G2D_SRC_BASE_ADDR 0x0304 50 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318 51 #define G2D_DST_BASE_ADDR 0x0404 52 #define G2D_DST_PLANE2_BASE_ADDR 0x0418 53 #define G2D_PAT_BASE_ADDR 0x0500 54 #define G2D_MSK_BASE_ADDR 0x0520 55 56 /* G2D_SOFT_RESET */ 57 #define G2D_SFRCLEAR (1 << 1) 58 #define G2D_R (1 << 0) 59 60 /* G2D_INTEN */ 61 #define G2D_INTEN_ACF (1 << 3) 62 #define G2D_INTEN_UCF (1 << 2) 63 #define G2D_INTEN_GCF (1 << 1) 64 #define G2D_INTEN_SCF (1 << 0) 65 66 /* G2D_INTC_PEND */ 67 #define G2D_INTP_ACMD_FIN (1 << 3) 68 #define G2D_INTP_UCMD_FIN (1 << 2) 69 #define G2D_INTP_GCMD_FIN (1 << 1) 70 #define G2D_INTP_SCMD_FIN (1 << 0) 71 72 /* G2D_DMA_COMMAND */ 73 #define G2D_DMA_HALT (1 << 2) 74 #define G2D_DMA_CONTINUE (1 << 1) 75 #define G2D_DMA_START (1 << 0) 76 77 /* G2D_DMA_STATUS */ 78 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17) 79 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1) 80 #define G2D_DMA_DONE (1 << 0) 81 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17 82 83 /* G2D_DMA_HOLD_CMD */ 84 #define G2D_USET_HOLD (1 << 2) 85 #define G2D_LIST_HOLD (1 << 1) 86 #define G2D_BITBLT_HOLD (1 << 0) 87 88 /* G2D_BITBLT_START */ 89 #define G2D_START_CASESEL (1 << 2) 90 #define G2D_START_NHOLT (1 << 1) 91 #define G2D_START_BITBLT (1 << 0) 92 93 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4) 94 #define G2D_CMDLIST_NUM 64 95 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM) 96 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2) 97 98 #define MAX_BUF_ADDR_NR 6 99 100 /* maximum buffer pool size of userptr is 64MB as default */ 101 #define MAX_POOL (64 * 1024 * 1024) 102 103 enum { 104 BUF_TYPE_GEM = 1, 105 BUF_TYPE_USERPTR, 106 }; 107 108 /* cmdlist data structure */ 109 struct g2d_cmdlist { 110 u32 head; 111 unsigned long data[G2D_CMDLIST_DATA_NUM]; 112 u32 last; /* last data offset */ 113 }; 114 115 struct drm_exynos_pending_g2d_event { 116 struct drm_pending_event base; 117 struct drm_exynos_g2d_event event; 118 }; 119 120 struct g2d_cmdlist_userptr { 121 struct list_head list; 122 dma_addr_t dma_addr; 123 unsigned long userptr; 124 unsigned long size; 125 struct page **pages; 126 unsigned int npages; 127 struct sg_table *sgt; 128 struct vm_area_struct *vma; 129 atomic_t refcount; 130 bool in_pool; 131 bool out_of_list; 132 }; 133 134 struct g2d_cmdlist_node { 135 struct list_head list; 136 struct g2d_cmdlist *cmdlist; 137 unsigned int map_nr; 138 unsigned long handles[MAX_BUF_ADDR_NR]; 139 unsigned int obj_type[MAX_BUF_ADDR_NR]; 140 dma_addr_t dma_addr; 141 142 struct drm_exynos_pending_g2d_event *event; 143 }; 144 145 struct g2d_runqueue_node { 146 struct list_head list; 147 struct list_head run_cmdlist; 148 struct list_head event_list; 149 struct drm_file *filp; 150 pid_t pid; 151 struct completion complete; 152 int async; 153 }; 154 155 struct g2d_data { 156 struct device *dev; 157 struct clk *gate_clk; 158 void __iomem *regs; 159 int irq; 160 struct workqueue_struct *g2d_workq; 161 struct work_struct runqueue_work; 162 struct exynos_drm_subdrv subdrv; 163 bool suspended; 164 165 /* cmdlist */ 166 struct g2d_cmdlist_node *cmdlist_node; 167 struct list_head free_cmdlist; 168 struct mutex cmdlist_mutex; 169 dma_addr_t cmdlist_pool; 170 void *cmdlist_pool_virt; 171 struct dma_attrs cmdlist_dma_attrs; 172 173 /* runqueue*/ 174 struct g2d_runqueue_node *runqueue_node; 175 struct list_head runqueue; 176 struct mutex runqueue_mutex; 177 struct kmem_cache *runqueue_slab; 178 179 unsigned long current_pool; 180 unsigned long max_pool; 181 }; 182 183 static int g2d_init_cmdlist(struct g2d_data *g2d) 184 { 185 struct device *dev = g2d->dev; 186 struct g2d_cmdlist_node *node = g2d->cmdlist_node; 187 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 188 int nr; 189 int ret; 190 191 init_dma_attrs(&g2d->cmdlist_dma_attrs); 192 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs); 193 194 g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev, 195 G2D_CMDLIST_POOL_SIZE, 196 &g2d->cmdlist_pool, GFP_KERNEL, 197 &g2d->cmdlist_dma_attrs); 198 if (!g2d->cmdlist_pool_virt) { 199 dev_err(dev, "failed to allocate dma memory\n"); 200 return -ENOMEM; 201 } 202 203 node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL); 204 if (!node) { 205 dev_err(dev, "failed to allocate memory\n"); 206 ret = -ENOMEM; 207 goto err; 208 } 209 210 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) { 211 node[nr].cmdlist = 212 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE; 213 node[nr].dma_addr = 214 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE; 215 216 list_add_tail(&node[nr].list, &g2d->free_cmdlist); 217 } 218 219 return 0; 220 221 err: 222 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE, 223 g2d->cmdlist_pool_virt, 224 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs); 225 return ret; 226 } 227 228 static void g2d_fini_cmdlist(struct g2d_data *g2d) 229 { 230 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 231 232 kfree(g2d->cmdlist_node); 233 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE, 234 g2d->cmdlist_pool_virt, 235 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs); 236 } 237 238 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d) 239 { 240 struct device *dev = g2d->dev; 241 struct g2d_cmdlist_node *node; 242 243 mutex_lock(&g2d->cmdlist_mutex); 244 if (list_empty(&g2d->free_cmdlist)) { 245 dev_err(dev, "there is no free cmdlist\n"); 246 mutex_unlock(&g2d->cmdlist_mutex); 247 return NULL; 248 } 249 250 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node, 251 list); 252 list_del_init(&node->list); 253 mutex_unlock(&g2d->cmdlist_mutex); 254 255 return node; 256 } 257 258 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node) 259 { 260 mutex_lock(&g2d->cmdlist_mutex); 261 list_move_tail(&node->list, &g2d->free_cmdlist); 262 mutex_unlock(&g2d->cmdlist_mutex); 263 } 264 265 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv, 266 struct g2d_cmdlist_node *node) 267 { 268 struct g2d_cmdlist_node *lnode; 269 270 if (list_empty(&g2d_priv->inuse_cmdlist)) 271 goto add_to_list; 272 273 /* this links to base address of new cmdlist */ 274 lnode = list_entry(g2d_priv->inuse_cmdlist.prev, 275 struct g2d_cmdlist_node, list); 276 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr; 277 278 add_to_list: 279 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist); 280 281 if (node->event) 282 list_add_tail(&node->event->base.link, &g2d_priv->event_list); 283 } 284 285 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev, 286 unsigned long obj, 287 bool force) 288 { 289 struct g2d_cmdlist_userptr *g2d_userptr = 290 (struct g2d_cmdlist_userptr *)obj; 291 292 if (!obj) 293 return; 294 295 if (force) 296 goto out; 297 298 atomic_dec(&g2d_userptr->refcount); 299 300 if (atomic_read(&g2d_userptr->refcount) > 0) 301 return; 302 303 if (g2d_userptr->in_pool) 304 return; 305 306 out: 307 exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt, 308 DMA_BIDIRECTIONAL); 309 310 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 311 g2d_userptr->npages, 312 g2d_userptr->vma); 313 314 if (!g2d_userptr->out_of_list) 315 list_del_init(&g2d_userptr->list); 316 317 sg_free_table(g2d_userptr->sgt); 318 kfree(g2d_userptr->sgt); 319 g2d_userptr->sgt = NULL; 320 321 kfree(g2d_userptr->pages); 322 g2d_userptr->pages = NULL; 323 kfree(g2d_userptr); 324 g2d_userptr = NULL; 325 } 326 327 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev, 328 unsigned long userptr, 329 unsigned long size, 330 struct drm_file *filp, 331 unsigned long *obj) 332 { 333 struct drm_exynos_file_private *file_priv = filp->driver_priv; 334 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 335 struct g2d_cmdlist_userptr *g2d_userptr; 336 struct g2d_data *g2d; 337 struct page **pages; 338 struct sg_table *sgt; 339 struct vm_area_struct *vma; 340 unsigned long start, end; 341 unsigned int npages, offset; 342 int ret; 343 344 if (!size) { 345 DRM_ERROR("invalid userptr size.\n"); 346 return ERR_PTR(-EINVAL); 347 } 348 349 g2d = dev_get_drvdata(g2d_priv->dev); 350 351 /* check if userptr already exists in userptr_list. */ 352 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) { 353 if (g2d_userptr->userptr == userptr) { 354 /* 355 * also check size because there could be same address 356 * and different size. 357 */ 358 if (g2d_userptr->size == size) { 359 atomic_inc(&g2d_userptr->refcount); 360 *obj = (unsigned long)g2d_userptr; 361 362 return &g2d_userptr->dma_addr; 363 } 364 365 /* 366 * at this moment, maybe g2d dma is accessing this 367 * g2d_userptr memory region so just remove this 368 * g2d_userptr object from userptr_list not to be 369 * referred again and also except it the userptr 370 * pool to be released after the dma access completion. 371 */ 372 g2d_userptr->out_of_list = true; 373 g2d_userptr->in_pool = false; 374 list_del_init(&g2d_userptr->list); 375 376 break; 377 } 378 } 379 380 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL); 381 if (!g2d_userptr) { 382 DRM_ERROR("failed to allocate g2d_userptr.\n"); 383 return ERR_PTR(-ENOMEM); 384 } 385 386 atomic_set(&g2d_userptr->refcount, 1); 387 388 start = userptr & PAGE_MASK; 389 offset = userptr & ~PAGE_MASK; 390 end = PAGE_ALIGN(userptr + size); 391 npages = (end - start) >> PAGE_SHIFT; 392 g2d_userptr->npages = npages; 393 394 pages = kzalloc(npages * sizeof(struct page *), GFP_KERNEL); 395 if (!pages) { 396 DRM_ERROR("failed to allocate pages.\n"); 397 kfree(g2d_userptr); 398 return ERR_PTR(-ENOMEM); 399 } 400 401 vma = find_vma(current->mm, userptr); 402 if (!vma) { 403 DRM_ERROR("failed to get vm region.\n"); 404 ret = -EFAULT; 405 goto err_free_pages; 406 } 407 408 if (vma->vm_end < userptr + size) { 409 DRM_ERROR("vma is too small.\n"); 410 ret = -EFAULT; 411 goto err_free_pages; 412 } 413 414 g2d_userptr->vma = exynos_gem_get_vma(vma); 415 if (!g2d_userptr->vma) { 416 DRM_ERROR("failed to copy vma.\n"); 417 ret = -ENOMEM; 418 goto err_free_pages; 419 } 420 421 g2d_userptr->size = size; 422 423 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK, 424 npages, pages, vma); 425 if (ret < 0) { 426 DRM_ERROR("failed to get user pages from userptr.\n"); 427 goto err_put_vma; 428 } 429 430 g2d_userptr->pages = pages; 431 432 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); 433 if (!sgt) { 434 DRM_ERROR("failed to allocate sg table.\n"); 435 ret = -ENOMEM; 436 goto err_free_userptr; 437 } 438 439 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset, 440 size, GFP_KERNEL); 441 if (ret < 0) { 442 DRM_ERROR("failed to get sgt from pages.\n"); 443 goto err_free_sgt; 444 } 445 446 g2d_userptr->sgt = sgt; 447 448 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt, 449 DMA_BIDIRECTIONAL); 450 if (ret < 0) { 451 DRM_ERROR("failed to map sgt with dma region.\n"); 452 goto err_free_sgt; 453 } 454 455 g2d_userptr->dma_addr = sgt->sgl[0].dma_address; 456 g2d_userptr->userptr = userptr; 457 458 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list); 459 460 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) { 461 g2d->current_pool += npages << PAGE_SHIFT; 462 g2d_userptr->in_pool = true; 463 } 464 465 *obj = (unsigned long)g2d_userptr; 466 467 return &g2d_userptr->dma_addr; 468 469 err_free_sgt: 470 sg_free_table(sgt); 471 kfree(sgt); 472 sgt = NULL; 473 474 err_free_userptr: 475 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 476 g2d_userptr->npages, 477 g2d_userptr->vma); 478 479 err_put_vma: 480 exynos_gem_put_vma(g2d_userptr->vma); 481 482 err_free_pages: 483 kfree(pages); 484 kfree(g2d_userptr); 485 pages = NULL; 486 g2d_userptr = NULL; 487 488 return ERR_PTR(ret); 489 } 490 491 static void g2d_userptr_free_all(struct drm_device *drm_dev, 492 struct g2d_data *g2d, 493 struct drm_file *filp) 494 { 495 struct drm_exynos_file_private *file_priv = filp->driver_priv; 496 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 497 struct g2d_cmdlist_userptr *g2d_userptr, *n; 498 499 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list) 500 if (g2d_userptr->in_pool) 501 g2d_userptr_put_dma_addr(drm_dev, 502 (unsigned long)g2d_userptr, 503 true); 504 505 g2d->current_pool = 0; 506 } 507 508 static int g2d_map_cmdlist_gem(struct g2d_data *g2d, 509 struct g2d_cmdlist_node *node, 510 struct drm_device *drm_dev, 511 struct drm_file *file) 512 { 513 struct g2d_cmdlist *cmdlist = node->cmdlist; 514 int offset; 515 int i; 516 517 for (i = 0; i < node->map_nr; i++) { 518 unsigned long handle; 519 dma_addr_t *addr; 520 521 offset = cmdlist->last - (i * 2 + 1); 522 handle = cmdlist->data[offset]; 523 524 if (node->obj_type[i] == BUF_TYPE_GEM) { 525 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, 526 file); 527 if (IS_ERR(addr)) { 528 node->map_nr = i; 529 return -EFAULT; 530 } 531 } else { 532 struct drm_exynos_g2d_userptr g2d_userptr; 533 534 if (copy_from_user(&g2d_userptr, (void __user *)handle, 535 sizeof(struct drm_exynos_g2d_userptr))) { 536 node->map_nr = i; 537 return -EFAULT; 538 } 539 540 addr = g2d_userptr_get_dma_addr(drm_dev, 541 g2d_userptr.userptr, 542 g2d_userptr.size, 543 file, 544 &handle); 545 if (IS_ERR(addr)) { 546 node->map_nr = i; 547 return -EFAULT; 548 } 549 } 550 551 cmdlist->data[offset] = *addr; 552 node->handles[i] = handle; 553 } 554 555 return 0; 556 } 557 558 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d, 559 struct g2d_cmdlist_node *node, 560 struct drm_file *filp) 561 { 562 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 563 int i; 564 565 for (i = 0; i < node->map_nr; i++) { 566 unsigned long handle = node->handles[i]; 567 568 if (node->obj_type[i] == BUF_TYPE_GEM) 569 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle, 570 filp); 571 else 572 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle, 573 false); 574 575 node->handles[i] = 0; 576 } 577 578 node->map_nr = 0; 579 } 580 581 static void g2d_dma_start(struct g2d_data *g2d, 582 struct g2d_runqueue_node *runqueue_node) 583 { 584 struct g2d_cmdlist_node *node = 585 list_first_entry(&runqueue_node->run_cmdlist, 586 struct g2d_cmdlist_node, list); 587 588 pm_runtime_get_sync(g2d->dev); 589 clk_enable(g2d->gate_clk); 590 591 /* interrupt enable */ 592 writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF, 593 g2d->regs + G2D_INTEN); 594 595 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); 596 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); 597 } 598 599 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d) 600 { 601 struct g2d_runqueue_node *runqueue_node; 602 603 if (list_empty(&g2d->runqueue)) 604 return NULL; 605 606 runqueue_node = list_first_entry(&g2d->runqueue, 607 struct g2d_runqueue_node, list); 608 list_del_init(&runqueue_node->list); 609 return runqueue_node; 610 } 611 612 static void g2d_free_runqueue_node(struct g2d_data *g2d, 613 struct g2d_runqueue_node *runqueue_node) 614 { 615 struct g2d_cmdlist_node *node; 616 617 if (!runqueue_node) 618 return; 619 620 mutex_lock(&g2d->cmdlist_mutex); 621 /* 622 * commands in run_cmdlist have been completed so unmap all gem 623 * objects in each command node so that they are unreferenced. 624 */ 625 list_for_each_entry(node, &runqueue_node->run_cmdlist, list) 626 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp); 627 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist); 628 mutex_unlock(&g2d->cmdlist_mutex); 629 630 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 631 } 632 633 static void g2d_exec_runqueue(struct g2d_data *g2d) 634 { 635 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 636 if (g2d->runqueue_node) 637 g2d_dma_start(g2d, g2d->runqueue_node); 638 } 639 640 static void g2d_runqueue_worker(struct work_struct *work) 641 { 642 struct g2d_data *g2d = container_of(work, struct g2d_data, 643 runqueue_work); 644 645 646 mutex_lock(&g2d->runqueue_mutex); 647 clk_disable(g2d->gate_clk); 648 pm_runtime_put_sync(g2d->dev); 649 650 complete(&g2d->runqueue_node->complete); 651 if (g2d->runqueue_node->async) 652 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 653 654 if (g2d->suspended) 655 g2d->runqueue_node = NULL; 656 else 657 g2d_exec_runqueue(g2d); 658 mutex_unlock(&g2d->runqueue_mutex); 659 } 660 661 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no) 662 { 663 struct drm_device *drm_dev = g2d->subdrv.drm_dev; 664 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node; 665 struct drm_exynos_pending_g2d_event *e; 666 struct timeval now; 667 unsigned long flags; 668 669 if (list_empty(&runqueue_node->event_list)) 670 return; 671 672 e = list_first_entry(&runqueue_node->event_list, 673 struct drm_exynos_pending_g2d_event, base.link); 674 675 do_gettimeofday(&now); 676 e->event.tv_sec = now.tv_sec; 677 e->event.tv_usec = now.tv_usec; 678 e->event.cmdlist_no = cmdlist_no; 679 680 spin_lock_irqsave(&drm_dev->event_lock, flags); 681 list_move_tail(&e->base.link, &e->base.file_priv->event_list); 682 wake_up_interruptible(&e->base.file_priv->event_wait); 683 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 684 } 685 686 static irqreturn_t g2d_irq_handler(int irq, void *dev_id) 687 { 688 struct g2d_data *g2d = dev_id; 689 u32 pending; 690 691 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND); 692 if (pending) 693 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND); 694 695 if (pending & G2D_INTP_GCMD_FIN) { 696 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS); 697 698 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >> 699 G2D_DMA_LIST_DONE_COUNT_OFFSET; 700 701 g2d_finish_event(g2d, cmdlist_no); 702 703 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD); 704 if (!(pending & G2D_INTP_ACMD_FIN)) { 705 writel_relaxed(G2D_DMA_CONTINUE, 706 g2d->regs + G2D_DMA_COMMAND); 707 } 708 } 709 710 if (pending & G2D_INTP_ACMD_FIN) 711 queue_work(g2d->g2d_workq, &g2d->runqueue_work); 712 713 return IRQ_HANDLED; 714 } 715 716 static int g2d_check_reg_offset(struct device *dev, 717 struct g2d_cmdlist_node *node, 718 int nr, bool for_addr) 719 { 720 struct g2d_cmdlist *cmdlist = node->cmdlist; 721 int reg_offset; 722 int index; 723 int i; 724 725 for (i = 0; i < nr; i++) { 726 index = cmdlist->last - 2 * (i + 1); 727 728 if (for_addr) { 729 /* check userptr buffer type. */ 730 reg_offset = (cmdlist->data[index] & 731 ~0x7fffffff) >> 31; 732 if (reg_offset) { 733 node->obj_type[i] = BUF_TYPE_USERPTR; 734 cmdlist->data[index] &= ~G2D_BUF_USERPTR; 735 } 736 } 737 738 reg_offset = cmdlist->data[index] & ~0xfffff000; 739 740 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END) 741 goto err; 742 if (reg_offset % 4) 743 goto err; 744 745 switch (reg_offset) { 746 case G2D_SRC_BASE_ADDR: 747 case G2D_SRC_PLANE2_BASE_ADDR: 748 case G2D_DST_BASE_ADDR: 749 case G2D_DST_PLANE2_BASE_ADDR: 750 case G2D_PAT_BASE_ADDR: 751 case G2D_MSK_BASE_ADDR: 752 if (!for_addr) 753 goto err; 754 755 if (node->obj_type[i] != BUF_TYPE_USERPTR) 756 node->obj_type[i] = BUF_TYPE_GEM; 757 break; 758 default: 759 if (for_addr) 760 goto err; 761 break; 762 } 763 } 764 765 return 0; 766 767 err: 768 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]); 769 return -EINVAL; 770 } 771 772 /* ioctl functions */ 773 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data, 774 struct drm_file *file) 775 { 776 struct drm_exynos_g2d_get_ver *ver = data; 777 778 ver->major = G2D_HW_MAJOR_VER; 779 ver->minor = G2D_HW_MINOR_VER; 780 781 return 0; 782 } 783 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl); 784 785 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, 786 struct drm_file *file) 787 { 788 struct drm_exynos_file_private *file_priv = file->driver_priv; 789 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 790 struct device *dev = g2d_priv->dev; 791 struct g2d_data *g2d; 792 struct drm_exynos_g2d_set_cmdlist *req = data; 793 struct drm_exynos_g2d_cmd *cmd; 794 struct drm_exynos_pending_g2d_event *e; 795 struct g2d_cmdlist_node *node; 796 struct g2d_cmdlist *cmdlist; 797 unsigned long flags; 798 int size; 799 int ret; 800 801 if (!dev) 802 return -ENODEV; 803 804 g2d = dev_get_drvdata(dev); 805 if (!g2d) 806 return -EFAULT; 807 808 node = g2d_get_cmdlist(g2d); 809 if (!node) 810 return -ENOMEM; 811 812 node->event = NULL; 813 814 if (req->event_type != G2D_EVENT_NOT) { 815 spin_lock_irqsave(&drm_dev->event_lock, flags); 816 if (file->event_space < sizeof(e->event)) { 817 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 818 ret = -ENOMEM; 819 goto err; 820 } 821 file->event_space -= sizeof(e->event); 822 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 823 824 e = kzalloc(sizeof(*node->event), GFP_KERNEL); 825 if (!e) { 826 dev_err(dev, "failed to allocate event\n"); 827 828 spin_lock_irqsave(&drm_dev->event_lock, flags); 829 file->event_space += sizeof(e->event); 830 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 831 832 ret = -ENOMEM; 833 goto err; 834 } 835 836 e->event.base.type = DRM_EXYNOS_G2D_EVENT; 837 e->event.base.length = sizeof(e->event); 838 e->event.user_data = req->user_data; 839 e->base.event = &e->event.base; 840 e->base.file_priv = file; 841 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; 842 843 node->event = e; 844 } 845 846 cmdlist = node->cmdlist; 847 848 cmdlist->last = 0; 849 850 /* 851 * If don't clear SFR registers, the cmdlist is affected by register 852 * values of previous cmdlist. G2D hw executes SFR clear command and 853 * a next command at the same time then the next command is ignored and 854 * is executed rightly from next next command, so needs a dummy command 855 * to next command of SFR clear command. 856 */ 857 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET; 858 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR; 859 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR; 860 cmdlist->data[cmdlist->last++] = 0; 861 862 if (node->event) { 863 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; 864 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; 865 } 866 867 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */ 868 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; 869 if (size > G2D_CMDLIST_DATA_NUM) { 870 dev_err(dev, "cmdlist size is too big\n"); 871 ret = -EINVAL; 872 goto err_free_event; 873 } 874 875 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd; 876 877 if (copy_from_user(cmdlist->data + cmdlist->last, 878 (void __user *)cmd, 879 sizeof(*cmd) * req->cmd_nr)) { 880 ret = -EFAULT; 881 goto err_free_event; 882 } 883 cmdlist->last += req->cmd_nr * 2; 884 885 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false); 886 if (ret < 0) 887 goto err_free_event; 888 889 node->map_nr = req->cmd_buf_nr; 890 if (req->cmd_buf_nr) { 891 struct drm_exynos_g2d_cmd *cmd_buf; 892 893 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf; 894 895 if (copy_from_user(cmdlist->data + cmdlist->last, 896 (void __user *)cmd_buf, 897 sizeof(*cmd_buf) * req->cmd_buf_nr)) { 898 ret = -EFAULT; 899 goto err_free_event; 900 } 901 cmdlist->last += req->cmd_buf_nr * 2; 902 903 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true); 904 if (ret < 0) 905 goto err_free_event; 906 907 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file); 908 if (ret < 0) 909 goto err_unmap; 910 } 911 912 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START; 913 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT; 914 915 /* head */ 916 cmdlist->head = cmdlist->last / 2; 917 918 /* tail */ 919 cmdlist->data[cmdlist->last] = 0; 920 921 g2d_add_cmdlist_to_inuse(g2d_priv, node); 922 923 return 0; 924 925 err_unmap: 926 g2d_unmap_cmdlist_gem(g2d, node, file); 927 err_free_event: 928 if (node->event) { 929 spin_lock_irqsave(&drm_dev->event_lock, flags); 930 file->event_space += sizeof(e->event); 931 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 932 kfree(node->event); 933 } 934 err: 935 g2d_put_cmdlist(g2d, node); 936 return ret; 937 } 938 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl); 939 940 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, 941 struct drm_file *file) 942 { 943 struct drm_exynos_file_private *file_priv = file->driver_priv; 944 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 945 struct device *dev = g2d_priv->dev; 946 struct g2d_data *g2d; 947 struct drm_exynos_g2d_exec *req = data; 948 struct g2d_runqueue_node *runqueue_node; 949 struct list_head *run_cmdlist; 950 struct list_head *event_list; 951 952 if (!dev) 953 return -ENODEV; 954 955 g2d = dev_get_drvdata(dev); 956 if (!g2d) 957 return -EFAULT; 958 959 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); 960 if (!runqueue_node) { 961 dev_err(dev, "failed to allocate memory\n"); 962 return -ENOMEM; 963 } 964 run_cmdlist = &runqueue_node->run_cmdlist; 965 event_list = &runqueue_node->event_list; 966 INIT_LIST_HEAD(run_cmdlist); 967 INIT_LIST_HEAD(event_list); 968 init_completion(&runqueue_node->complete); 969 runqueue_node->async = req->async; 970 971 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist); 972 list_splice_init(&g2d_priv->event_list, event_list); 973 974 if (list_empty(run_cmdlist)) { 975 dev_err(dev, "there is no inuse cmdlist\n"); 976 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 977 return -EPERM; 978 } 979 980 mutex_lock(&g2d->runqueue_mutex); 981 runqueue_node->pid = current->pid; 982 runqueue_node->filp = file; 983 list_add_tail(&runqueue_node->list, &g2d->runqueue); 984 if (!g2d->runqueue_node) 985 g2d_exec_runqueue(g2d); 986 mutex_unlock(&g2d->runqueue_mutex); 987 988 if (runqueue_node->async) 989 goto out; 990 991 wait_for_completion(&runqueue_node->complete); 992 g2d_free_runqueue_node(g2d, runqueue_node); 993 994 out: 995 return 0; 996 } 997 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl); 998 999 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 1000 { 1001 struct g2d_data *g2d; 1002 int ret; 1003 1004 g2d = dev_get_drvdata(dev); 1005 if (!g2d) 1006 return -EFAULT; 1007 1008 /* allocate dma-aware cmdlist buffer. */ 1009 ret = g2d_init_cmdlist(g2d); 1010 if (ret < 0) { 1011 dev_err(dev, "cmdlist init failed\n"); 1012 return ret; 1013 } 1014 1015 if (!is_drm_iommu_supported(drm_dev)) 1016 return 0; 1017 1018 ret = drm_iommu_attach_device(drm_dev, dev); 1019 if (ret < 0) { 1020 dev_err(dev, "failed to enable iommu.\n"); 1021 g2d_fini_cmdlist(g2d); 1022 } 1023 1024 return ret; 1025 1026 } 1027 1028 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev) 1029 { 1030 if (!is_drm_iommu_supported(drm_dev)) 1031 return; 1032 1033 drm_iommu_detach_device(drm_dev, dev); 1034 } 1035 1036 static int g2d_open(struct drm_device *drm_dev, struct device *dev, 1037 struct drm_file *file) 1038 { 1039 struct drm_exynos_file_private *file_priv = file->driver_priv; 1040 struct exynos_drm_g2d_private *g2d_priv; 1041 1042 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL); 1043 if (!g2d_priv) { 1044 dev_err(dev, "failed to allocate g2d private data\n"); 1045 return -ENOMEM; 1046 } 1047 1048 g2d_priv->dev = dev; 1049 file_priv->g2d_priv = g2d_priv; 1050 1051 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist); 1052 INIT_LIST_HEAD(&g2d_priv->event_list); 1053 INIT_LIST_HEAD(&g2d_priv->userptr_list); 1054 1055 return 0; 1056 } 1057 1058 static void g2d_close(struct drm_device *drm_dev, struct device *dev, 1059 struct drm_file *file) 1060 { 1061 struct drm_exynos_file_private *file_priv = file->driver_priv; 1062 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1063 struct g2d_data *g2d; 1064 struct g2d_cmdlist_node *node, *n; 1065 1066 if (!dev) 1067 return; 1068 1069 g2d = dev_get_drvdata(dev); 1070 if (!g2d) 1071 return; 1072 1073 mutex_lock(&g2d->cmdlist_mutex); 1074 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) { 1075 /* 1076 * unmap all gem objects not completed. 1077 * 1078 * P.S. if current process was terminated forcely then 1079 * there may be some commands in inuse_cmdlist so unmap 1080 * them. 1081 */ 1082 g2d_unmap_cmdlist_gem(g2d, node, file); 1083 list_move_tail(&node->list, &g2d->free_cmdlist); 1084 } 1085 mutex_unlock(&g2d->cmdlist_mutex); 1086 1087 /* release all g2d_userptr in pool. */ 1088 g2d_userptr_free_all(drm_dev, g2d, file); 1089 1090 kfree(file_priv->g2d_priv); 1091 } 1092 1093 static int g2d_probe(struct platform_device *pdev) 1094 { 1095 struct device *dev = &pdev->dev; 1096 struct resource *res; 1097 struct g2d_data *g2d; 1098 struct exynos_drm_subdrv *subdrv; 1099 int ret; 1100 1101 g2d = devm_kzalloc(&pdev->dev, sizeof(*g2d), GFP_KERNEL); 1102 if (!g2d) { 1103 dev_err(dev, "failed to allocate driver data\n"); 1104 return -ENOMEM; 1105 } 1106 1107 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab", 1108 sizeof(struct g2d_runqueue_node), 0, 0, NULL); 1109 if (!g2d->runqueue_slab) 1110 return -ENOMEM; 1111 1112 g2d->dev = dev; 1113 1114 g2d->g2d_workq = create_singlethread_workqueue("g2d"); 1115 if (!g2d->g2d_workq) { 1116 dev_err(dev, "failed to create workqueue\n"); 1117 ret = -EINVAL; 1118 goto err_destroy_slab; 1119 } 1120 1121 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker); 1122 INIT_LIST_HEAD(&g2d->free_cmdlist); 1123 INIT_LIST_HEAD(&g2d->runqueue); 1124 1125 mutex_init(&g2d->cmdlist_mutex); 1126 mutex_init(&g2d->runqueue_mutex); 1127 1128 g2d->gate_clk = devm_clk_get(dev, "fimg2d"); 1129 if (IS_ERR(g2d->gate_clk)) { 1130 dev_err(dev, "failed to get gate clock\n"); 1131 ret = PTR_ERR(g2d->gate_clk); 1132 goto err_destroy_workqueue; 1133 } 1134 1135 pm_runtime_enable(dev); 1136 1137 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1138 1139 g2d->regs = devm_request_and_ioremap(&pdev->dev, res); 1140 if (!g2d->regs) { 1141 dev_err(dev, "failed to remap I/O memory\n"); 1142 ret = -ENXIO; 1143 goto err_put_clk; 1144 } 1145 1146 g2d->irq = platform_get_irq(pdev, 0); 1147 if (g2d->irq < 0) { 1148 dev_err(dev, "failed to get irq\n"); 1149 ret = g2d->irq; 1150 goto err_put_clk; 1151 } 1152 1153 ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0, 1154 "drm_g2d", g2d); 1155 if (ret < 0) { 1156 dev_err(dev, "irq request failed\n"); 1157 goto err_put_clk; 1158 } 1159 1160 g2d->max_pool = MAX_POOL; 1161 1162 platform_set_drvdata(pdev, g2d); 1163 1164 subdrv = &g2d->subdrv; 1165 subdrv->dev = dev; 1166 subdrv->probe = g2d_subdrv_probe; 1167 subdrv->remove = g2d_subdrv_remove; 1168 subdrv->open = g2d_open; 1169 subdrv->close = g2d_close; 1170 1171 ret = exynos_drm_subdrv_register(subdrv); 1172 if (ret < 0) { 1173 dev_err(dev, "failed to register drm g2d device\n"); 1174 goto err_put_clk; 1175 } 1176 1177 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n", 1178 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); 1179 1180 return 0; 1181 1182 err_put_clk: 1183 pm_runtime_disable(dev); 1184 err_destroy_workqueue: 1185 destroy_workqueue(g2d->g2d_workq); 1186 err_destroy_slab: 1187 kmem_cache_destroy(g2d->runqueue_slab); 1188 return ret; 1189 } 1190 1191 static int g2d_remove(struct platform_device *pdev) 1192 { 1193 struct g2d_data *g2d = platform_get_drvdata(pdev); 1194 1195 cancel_work_sync(&g2d->runqueue_work); 1196 exynos_drm_subdrv_unregister(&g2d->subdrv); 1197 1198 while (g2d->runqueue_node) { 1199 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 1200 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 1201 } 1202 1203 pm_runtime_disable(&pdev->dev); 1204 1205 g2d_fini_cmdlist(g2d); 1206 destroy_workqueue(g2d->g2d_workq); 1207 kmem_cache_destroy(g2d->runqueue_slab); 1208 1209 return 0; 1210 } 1211 1212 #ifdef CONFIG_PM_SLEEP 1213 static int g2d_suspend(struct device *dev) 1214 { 1215 struct g2d_data *g2d = dev_get_drvdata(dev); 1216 1217 mutex_lock(&g2d->runqueue_mutex); 1218 g2d->suspended = true; 1219 mutex_unlock(&g2d->runqueue_mutex); 1220 1221 while (g2d->runqueue_node) 1222 /* FIXME: good range? */ 1223 usleep_range(500, 1000); 1224 1225 flush_work(&g2d->runqueue_work); 1226 1227 return 0; 1228 } 1229 1230 static int g2d_resume(struct device *dev) 1231 { 1232 struct g2d_data *g2d = dev_get_drvdata(dev); 1233 1234 g2d->suspended = false; 1235 g2d_exec_runqueue(g2d); 1236 1237 return 0; 1238 } 1239 #endif 1240 1241 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume); 1242 1243 struct platform_driver g2d_driver = { 1244 .probe = g2d_probe, 1245 .remove = g2d_remove, 1246 .driver = { 1247 .name = "s5p-g2d", 1248 .owner = THIS_MODULE, 1249 .pm = &g2d_pm_ops, 1250 }, 1251 }; 1252