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/clk.h> 12 #include <linux/err.h> 13 #include <linux/interrupt.h> 14 #include <linux/io.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/slab.h> 18 #include <linux/workqueue.h> 19 #include <linux/dma-mapping.h> 20 #include <linux/dma-attrs.h> 21 #include <linux/of.h> 22 23 #include <drm/drmP.h> 24 #include <drm/exynos_drm.h> 25 #include "exynos_drm_drv.h" 26 #include "exynos_drm_g2d.h" 27 #include "exynos_drm_gem.h" 28 #include "exynos_drm_iommu.h" 29 30 #define G2D_HW_MAJOR_VER 4 31 #define G2D_HW_MINOR_VER 1 32 33 /* vaild register range set from user: 0x0104 ~ 0x0880 */ 34 #define G2D_VALID_START 0x0104 35 #define G2D_VALID_END 0x0880 36 37 /* general registers */ 38 #define G2D_SOFT_RESET 0x0000 39 #define G2D_INTEN 0x0004 40 #define G2D_INTC_PEND 0x000C 41 #define G2D_DMA_SFR_BASE_ADDR 0x0080 42 #define G2D_DMA_COMMAND 0x0084 43 #define G2D_DMA_STATUS 0x008C 44 #define G2D_DMA_HOLD_CMD 0x0090 45 46 /* command registers */ 47 #define G2D_BITBLT_START 0x0100 48 49 /* registers for base address */ 50 #define G2D_SRC_BASE_ADDR 0x0304 51 #define G2D_SRC_COLOR_MODE 0x030C 52 #define G2D_SRC_LEFT_TOP 0x0310 53 #define G2D_SRC_RIGHT_BOTTOM 0x0314 54 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318 55 #define G2D_DST_BASE_ADDR 0x0404 56 #define G2D_DST_COLOR_MODE 0x040C 57 #define G2D_DST_LEFT_TOP 0x0410 58 #define G2D_DST_RIGHT_BOTTOM 0x0414 59 #define G2D_DST_PLANE2_BASE_ADDR 0x0418 60 #define G2D_PAT_BASE_ADDR 0x0500 61 #define G2D_MSK_BASE_ADDR 0x0520 62 63 /* G2D_SOFT_RESET */ 64 #define G2D_SFRCLEAR (1 << 1) 65 #define G2D_R (1 << 0) 66 67 /* G2D_INTEN */ 68 #define G2D_INTEN_ACF (1 << 3) 69 #define G2D_INTEN_UCF (1 << 2) 70 #define G2D_INTEN_GCF (1 << 1) 71 #define G2D_INTEN_SCF (1 << 0) 72 73 /* G2D_INTC_PEND */ 74 #define G2D_INTP_ACMD_FIN (1 << 3) 75 #define G2D_INTP_UCMD_FIN (1 << 2) 76 #define G2D_INTP_GCMD_FIN (1 << 1) 77 #define G2D_INTP_SCMD_FIN (1 << 0) 78 79 /* G2D_DMA_COMMAND */ 80 #define G2D_DMA_HALT (1 << 2) 81 #define G2D_DMA_CONTINUE (1 << 1) 82 #define G2D_DMA_START (1 << 0) 83 84 /* G2D_DMA_STATUS */ 85 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17) 86 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1) 87 #define G2D_DMA_DONE (1 << 0) 88 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17 89 90 /* G2D_DMA_HOLD_CMD */ 91 #define G2D_USER_HOLD (1 << 2) 92 #define G2D_LIST_HOLD (1 << 1) 93 #define G2D_BITBLT_HOLD (1 << 0) 94 95 /* G2D_BITBLT_START */ 96 #define G2D_START_CASESEL (1 << 2) 97 #define G2D_START_NHOLT (1 << 1) 98 #define G2D_START_BITBLT (1 << 0) 99 100 /* buffer color format */ 101 #define G2D_FMT_XRGB8888 0 102 #define G2D_FMT_ARGB8888 1 103 #define G2D_FMT_RGB565 2 104 #define G2D_FMT_XRGB1555 3 105 #define G2D_FMT_ARGB1555 4 106 #define G2D_FMT_XRGB4444 5 107 #define G2D_FMT_ARGB4444 6 108 #define G2D_FMT_PACKED_RGB888 7 109 #define G2D_FMT_A8 11 110 #define G2D_FMT_L8 12 111 112 /* buffer valid length */ 113 #define G2D_LEN_MIN 1 114 #define G2D_LEN_MAX 8000 115 116 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4) 117 #define G2D_CMDLIST_NUM 64 118 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM) 119 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2) 120 121 /* maximum buffer pool size of userptr is 64MB as default */ 122 #define MAX_POOL (64 * 1024 * 1024) 123 124 enum { 125 BUF_TYPE_GEM = 1, 126 BUF_TYPE_USERPTR, 127 }; 128 129 enum g2d_reg_type { 130 REG_TYPE_NONE = -1, 131 REG_TYPE_SRC, 132 REG_TYPE_SRC_PLANE2, 133 REG_TYPE_DST, 134 REG_TYPE_DST_PLANE2, 135 REG_TYPE_PAT, 136 REG_TYPE_MSK, 137 MAX_REG_TYPE_NR 138 }; 139 140 /* cmdlist data structure */ 141 struct g2d_cmdlist { 142 u32 head; 143 unsigned long data[G2D_CMDLIST_DATA_NUM]; 144 u32 last; /* last data offset */ 145 }; 146 147 /* 148 * A structure of buffer description 149 * 150 * @format: color format 151 * @left_x: the x coordinates of left top corner 152 * @top_y: the y coordinates of left top corner 153 * @right_x: the x coordinates of right bottom corner 154 * @bottom_y: the y coordinates of right bottom corner 155 * 156 */ 157 struct g2d_buf_desc { 158 unsigned int format; 159 unsigned int left_x; 160 unsigned int top_y; 161 unsigned int right_x; 162 unsigned int bottom_y; 163 }; 164 165 /* 166 * A structure of buffer information 167 * 168 * @map_nr: manages the number of mapped buffers 169 * @reg_types: stores regitster type in the order of requested command 170 * @handles: stores buffer handle in its reg_type position 171 * @types: stores buffer type in its reg_type position 172 * @descs: stores buffer description in its reg_type position 173 * 174 */ 175 struct g2d_buf_info { 176 unsigned int map_nr; 177 enum g2d_reg_type reg_types[MAX_REG_TYPE_NR]; 178 unsigned long handles[MAX_REG_TYPE_NR]; 179 unsigned int types[MAX_REG_TYPE_NR]; 180 struct g2d_buf_desc descs[MAX_REG_TYPE_NR]; 181 }; 182 183 struct drm_exynos_pending_g2d_event { 184 struct drm_pending_event base; 185 struct drm_exynos_g2d_event event; 186 }; 187 188 struct g2d_cmdlist_userptr { 189 struct list_head list; 190 dma_addr_t dma_addr; 191 unsigned long userptr; 192 unsigned long size; 193 struct page **pages; 194 unsigned int npages; 195 struct sg_table *sgt; 196 struct vm_area_struct *vma; 197 atomic_t refcount; 198 bool in_pool; 199 bool out_of_list; 200 }; 201 struct g2d_cmdlist_node { 202 struct list_head list; 203 struct g2d_cmdlist *cmdlist; 204 dma_addr_t dma_addr; 205 struct g2d_buf_info buf_info; 206 207 struct drm_exynos_pending_g2d_event *event; 208 }; 209 210 struct g2d_runqueue_node { 211 struct list_head list; 212 struct list_head run_cmdlist; 213 struct list_head event_list; 214 struct drm_file *filp; 215 pid_t pid; 216 struct completion complete; 217 int async; 218 }; 219 220 struct g2d_data { 221 struct device *dev; 222 struct clk *gate_clk; 223 void __iomem *regs; 224 int irq; 225 struct workqueue_struct *g2d_workq; 226 struct work_struct runqueue_work; 227 struct exynos_drm_subdrv subdrv; 228 bool suspended; 229 230 /* cmdlist */ 231 struct g2d_cmdlist_node *cmdlist_node; 232 struct list_head free_cmdlist; 233 struct mutex cmdlist_mutex; 234 dma_addr_t cmdlist_pool; 235 void *cmdlist_pool_virt; 236 struct dma_attrs cmdlist_dma_attrs; 237 238 /* runqueue*/ 239 struct g2d_runqueue_node *runqueue_node; 240 struct list_head runqueue; 241 struct mutex runqueue_mutex; 242 struct kmem_cache *runqueue_slab; 243 244 unsigned long current_pool; 245 unsigned long max_pool; 246 }; 247 248 static int g2d_init_cmdlist(struct g2d_data *g2d) 249 { 250 struct device *dev = g2d->dev; 251 struct g2d_cmdlist_node *node = g2d->cmdlist_node; 252 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 253 int nr; 254 int ret; 255 struct g2d_buf_info *buf_info; 256 257 init_dma_attrs(&g2d->cmdlist_dma_attrs); 258 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs); 259 260 g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev, 261 G2D_CMDLIST_POOL_SIZE, 262 &g2d->cmdlist_pool, GFP_KERNEL, 263 &g2d->cmdlist_dma_attrs); 264 if (!g2d->cmdlist_pool_virt) { 265 dev_err(dev, "failed to allocate dma memory\n"); 266 return -ENOMEM; 267 } 268 269 node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL); 270 if (!node) { 271 dev_err(dev, "failed to allocate memory\n"); 272 ret = -ENOMEM; 273 goto err; 274 } 275 276 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) { 277 unsigned int i; 278 279 node[nr].cmdlist = 280 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE; 281 node[nr].dma_addr = 282 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE; 283 284 buf_info = &node[nr].buf_info; 285 for (i = 0; i < MAX_REG_TYPE_NR; i++) 286 buf_info->reg_types[i] = REG_TYPE_NONE; 287 288 list_add_tail(&node[nr].list, &g2d->free_cmdlist); 289 } 290 291 return 0; 292 293 err: 294 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE, 295 g2d->cmdlist_pool_virt, 296 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs); 297 return ret; 298 } 299 300 static void g2d_fini_cmdlist(struct g2d_data *g2d) 301 { 302 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 303 304 kfree(g2d->cmdlist_node); 305 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE, 306 g2d->cmdlist_pool_virt, 307 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs); 308 } 309 310 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d) 311 { 312 struct device *dev = g2d->dev; 313 struct g2d_cmdlist_node *node; 314 315 mutex_lock(&g2d->cmdlist_mutex); 316 if (list_empty(&g2d->free_cmdlist)) { 317 dev_err(dev, "there is no free cmdlist\n"); 318 mutex_unlock(&g2d->cmdlist_mutex); 319 return NULL; 320 } 321 322 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node, 323 list); 324 list_del_init(&node->list); 325 mutex_unlock(&g2d->cmdlist_mutex); 326 327 return node; 328 } 329 330 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node) 331 { 332 mutex_lock(&g2d->cmdlist_mutex); 333 list_move_tail(&node->list, &g2d->free_cmdlist); 334 mutex_unlock(&g2d->cmdlist_mutex); 335 } 336 337 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv, 338 struct g2d_cmdlist_node *node) 339 { 340 struct g2d_cmdlist_node *lnode; 341 342 if (list_empty(&g2d_priv->inuse_cmdlist)) 343 goto add_to_list; 344 345 /* this links to base address of new cmdlist */ 346 lnode = list_entry(g2d_priv->inuse_cmdlist.prev, 347 struct g2d_cmdlist_node, list); 348 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr; 349 350 add_to_list: 351 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist); 352 353 if (node->event) 354 list_add_tail(&node->event->base.link, &g2d_priv->event_list); 355 } 356 357 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev, 358 unsigned long obj, 359 bool force) 360 { 361 struct g2d_cmdlist_userptr *g2d_userptr = 362 (struct g2d_cmdlist_userptr *)obj; 363 364 if (!obj) 365 return; 366 367 if (force) 368 goto out; 369 370 atomic_dec(&g2d_userptr->refcount); 371 372 if (atomic_read(&g2d_userptr->refcount) > 0) 373 return; 374 375 if (g2d_userptr->in_pool) 376 return; 377 378 out: 379 exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt, 380 DMA_BIDIRECTIONAL); 381 382 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 383 g2d_userptr->npages, 384 g2d_userptr->vma); 385 386 exynos_gem_put_vma(g2d_userptr->vma); 387 388 if (!g2d_userptr->out_of_list) 389 list_del_init(&g2d_userptr->list); 390 391 sg_free_table(g2d_userptr->sgt); 392 kfree(g2d_userptr->sgt); 393 394 drm_free_large(g2d_userptr->pages); 395 kfree(g2d_userptr); 396 } 397 398 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev, 399 unsigned long userptr, 400 unsigned long size, 401 struct drm_file *filp, 402 unsigned long *obj) 403 { 404 struct drm_exynos_file_private *file_priv = filp->driver_priv; 405 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 406 struct g2d_cmdlist_userptr *g2d_userptr; 407 struct g2d_data *g2d; 408 struct page **pages; 409 struct sg_table *sgt; 410 struct vm_area_struct *vma; 411 unsigned long start, end; 412 unsigned int npages, offset; 413 int ret; 414 415 if (!size) { 416 DRM_ERROR("invalid userptr size.\n"); 417 return ERR_PTR(-EINVAL); 418 } 419 420 g2d = dev_get_drvdata(g2d_priv->dev); 421 422 /* check if userptr already exists in userptr_list. */ 423 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) { 424 if (g2d_userptr->userptr == userptr) { 425 /* 426 * also check size because there could be same address 427 * and different size. 428 */ 429 if (g2d_userptr->size == size) { 430 atomic_inc(&g2d_userptr->refcount); 431 *obj = (unsigned long)g2d_userptr; 432 433 return &g2d_userptr->dma_addr; 434 } 435 436 /* 437 * at this moment, maybe g2d dma is accessing this 438 * g2d_userptr memory region so just remove this 439 * g2d_userptr object from userptr_list not to be 440 * referred again and also except it the userptr 441 * pool to be released after the dma access completion. 442 */ 443 g2d_userptr->out_of_list = true; 444 g2d_userptr->in_pool = false; 445 list_del_init(&g2d_userptr->list); 446 447 break; 448 } 449 } 450 451 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL); 452 if (!g2d_userptr) 453 return ERR_PTR(-ENOMEM); 454 455 atomic_set(&g2d_userptr->refcount, 1); 456 457 start = userptr & PAGE_MASK; 458 offset = userptr & ~PAGE_MASK; 459 end = PAGE_ALIGN(userptr + size); 460 npages = (end - start) >> PAGE_SHIFT; 461 g2d_userptr->npages = npages; 462 463 pages = drm_calloc_large(npages, sizeof(struct page *)); 464 if (!pages) { 465 DRM_ERROR("failed to allocate pages.\n"); 466 ret = -ENOMEM; 467 goto err_free; 468 } 469 470 down_read(¤t->mm->mmap_sem); 471 vma = find_vma(current->mm, userptr); 472 if (!vma) { 473 up_read(¤t->mm->mmap_sem); 474 DRM_ERROR("failed to get vm region.\n"); 475 ret = -EFAULT; 476 goto err_free_pages; 477 } 478 479 if (vma->vm_end < userptr + size) { 480 up_read(¤t->mm->mmap_sem); 481 DRM_ERROR("vma is too small.\n"); 482 ret = -EFAULT; 483 goto err_free_pages; 484 } 485 486 g2d_userptr->vma = exynos_gem_get_vma(vma); 487 if (!g2d_userptr->vma) { 488 up_read(¤t->mm->mmap_sem); 489 DRM_ERROR("failed to copy vma.\n"); 490 ret = -ENOMEM; 491 goto err_free_pages; 492 } 493 494 g2d_userptr->size = size; 495 496 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK, 497 npages, pages, vma); 498 if (ret < 0) { 499 up_read(¤t->mm->mmap_sem); 500 DRM_ERROR("failed to get user pages from userptr.\n"); 501 goto err_put_vma; 502 } 503 504 up_read(¤t->mm->mmap_sem); 505 g2d_userptr->pages = pages; 506 507 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); 508 if (!sgt) { 509 ret = -ENOMEM; 510 goto err_free_userptr; 511 } 512 513 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset, 514 size, GFP_KERNEL); 515 if (ret < 0) { 516 DRM_ERROR("failed to get sgt from pages.\n"); 517 goto err_free_sgt; 518 } 519 520 g2d_userptr->sgt = sgt; 521 522 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt, 523 DMA_BIDIRECTIONAL); 524 if (ret < 0) { 525 DRM_ERROR("failed to map sgt with dma region.\n"); 526 goto err_sg_free_table; 527 } 528 529 g2d_userptr->dma_addr = sgt->sgl[0].dma_address; 530 g2d_userptr->userptr = userptr; 531 532 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list); 533 534 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) { 535 g2d->current_pool += npages << PAGE_SHIFT; 536 g2d_userptr->in_pool = true; 537 } 538 539 *obj = (unsigned long)g2d_userptr; 540 541 return &g2d_userptr->dma_addr; 542 543 err_sg_free_table: 544 sg_free_table(sgt); 545 546 err_free_sgt: 547 kfree(sgt); 548 549 err_free_userptr: 550 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 551 g2d_userptr->npages, 552 g2d_userptr->vma); 553 554 err_put_vma: 555 exynos_gem_put_vma(g2d_userptr->vma); 556 557 err_free_pages: 558 drm_free_large(pages); 559 560 err_free: 561 kfree(g2d_userptr); 562 563 return ERR_PTR(ret); 564 } 565 566 static void g2d_userptr_free_all(struct drm_device *drm_dev, 567 struct g2d_data *g2d, 568 struct drm_file *filp) 569 { 570 struct drm_exynos_file_private *file_priv = filp->driver_priv; 571 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 572 struct g2d_cmdlist_userptr *g2d_userptr, *n; 573 574 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list) 575 if (g2d_userptr->in_pool) 576 g2d_userptr_put_dma_addr(drm_dev, 577 (unsigned long)g2d_userptr, 578 true); 579 580 g2d->current_pool = 0; 581 } 582 583 static enum g2d_reg_type g2d_get_reg_type(int reg_offset) 584 { 585 enum g2d_reg_type reg_type; 586 587 switch (reg_offset) { 588 case G2D_SRC_BASE_ADDR: 589 case G2D_SRC_COLOR_MODE: 590 case G2D_SRC_LEFT_TOP: 591 case G2D_SRC_RIGHT_BOTTOM: 592 reg_type = REG_TYPE_SRC; 593 break; 594 case G2D_SRC_PLANE2_BASE_ADDR: 595 reg_type = REG_TYPE_SRC_PLANE2; 596 break; 597 case G2D_DST_BASE_ADDR: 598 case G2D_DST_COLOR_MODE: 599 case G2D_DST_LEFT_TOP: 600 case G2D_DST_RIGHT_BOTTOM: 601 reg_type = REG_TYPE_DST; 602 break; 603 case G2D_DST_PLANE2_BASE_ADDR: 604 reg_type = REG_TYPE_DST_PLANE2; 605 break; 606 case G2D_PAT_BASE_ADDR: 607 reg_type = REG_TYPE_PAT; 608 break; 609 case G2D_MSK_BASE_ADDR: 610 reg_type = REG_TYPE_MSK; 611 break; 612 default: 613 reg_type = REG_TYPE_NONE; 614 DRM_ERROR("Unknown register offset![%d]\n", reg_offset); 615 break; 616 } 617 618 return reg_type; 619 } 620 621 static unsigned long g2d_get_buf_bpp(unsigned int format) 622 { 623 unsigned long bpp; 624 625 switch (format) { 626 case G2D_FMT_XRGB8888: 627 case G2D_FMT_ARGB8888: 628 bpp = 4; 629 break; 630 case G2D_FMT_RGB565: 631 case G2D_FMT_XRGB1555: 632 case G2D_FMT_ARGB1555: 633 case G2D_FMT_XRGB4444: 634 case G2D_FMT_ARGB4444: 635 bpp = 2; 636 break; 637 case G2D_FMT_PACKED_RGB888: 638 bpp = 3; 639 break; 640 default: 641 bpp = 1; 642 break; 643 } 644 645 return bpp; 646 } 647 648 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc, 649 enum g2d_reg_type reg_type, 650 unsigned long size) 651 { 652 unsigned int width, height; 653 unsigned long area; 654 655 /* 656 * check source and destination buffers only. 657 * so the others are always valid. 658 */ 659 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST) 660 return true; 661 662 width = buf_desc->right_x - buf_desc->left_x; 663 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) { 664 DRM_ERROR("width[%u] is out of range!\n", width); 665 return false; 666 } 667 668 height = buf_desc->bottom_y - buf_desc->top_y; 669 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) { 670 DRM_ERROR("height[%u] is out of range!\n", height); 671 return false; 672 } 673 674 area = (unsigned long)width * (unsigned long)height * 675 g2d_get_buf_bpp(buf_desc->format); 676 if (area > size) { 677 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size); 678 return false; 679 } 680 681 return true; 682 } 683 684 static int g2d_map_cmdlist_gem(struct g2d_data *g2d, 685 struct g2d_cmdlist_node *node, 686 struct drm_device *drm_dev, 687 struct drm_file *file) 688 { 689 struct g2d_cmdlist *cmdlist = node->cmdlist; 690 struct g2d_buf_info *buf_info = &node->buf_info; 691 int offset; 692 int ret; 693 int i; 694 695 for (i = 0; i < buf_info->map_nr; i++) { 696 struct g2d_buf_desc *buf_desc; 697 enum g2d_reg_type reg_type; 698 int reg_pos; 699 unsigned long handle; 700 dma_addr_t *addr; 701 702 reg_pos = cmdlist->last - 2 * (i + 1); 703 704 offset = cmdlist->data[reg_pos]; 705 handle = cmdlist->data[reg_pos + 1]; 706 707 reg_type = g2d_get_reg_type(offset); 708 if (reg_type == REG_TYPE_NONE) { 709 ret = -EFAULT; 710 goto err; 711 } 712 713 buf_desc = &buf_info->descs[reg_type]; 714 715 if (buf_info->types[reg_type] == BUF_TYPE_GEM) { 716 unsigned long size; 717 718 size = exynos_drm_gem_get_size(drm_dev, handle, file); 719 if (!size) { 720 ret = -EFAULT; 721 goto err; 722 } 723 724 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 725 size)) { 726 ret = -EFAULT; 727 goto err; 728 } 729 730 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, 731 file); 732 if (IS_ERR(addr)) { 733 ret = -EFAULT; 734 goto err; 735 } 736 } else { 737 struct drm_exynos_g2d_userptr g2d_userptr; 738 739 if (copy_from_user(&g2d_userptr, (void __user *)handle, 740 sizeof(struct drm_exynos_g2d_userptr))) { 741 ret = -EFAULT; 742 goto err; 743 } 744 745 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 746 g2d_userptr.size)) { 747 ret = -EFAULT; 748 goto err; 749 } 750 751 addr = g2d_userptr_get_dma_addr(drm_dev, 752 g2d_userptr.userptr, 753 g2d_userptr.size, 754 file, 755 &handle); 756 if (IS_ERR(addr)) { 757 ret = -EFAULT; 758 goto err; 759 } 760 } 761 762 cmdlist->data[reg_pos + 1] = *addr; 763 buf_info->reg_types[i] = reg_type; 764 buf_info->handles[reg_type] = handle; 765 } 766 767 return 0; 768 769 err: 770 buf_info->map_nr = i; 771 return ret; 772 } 773 774 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d, 775 struct g2d_cmdlist_node *node, 776 struct drm_file *filp) 777 { 778 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 779 struct g2d_buf_info *buf_info = &node->buf_info; 780 int i; 781 782 for (i = 0; i < buf_info->map_nr; i++) { 783 struct g2d_buf_desc *buf_desc; 784 enum g2d_reg_type reg_type; 785 unsigned long handle; 786 787 reg_type = buf_info->reg_types[i]; 788 789 buf_desc = &buf_info->descs[reg_type]; 790 handle = buf_info->handles[reg_type]; 791 792 if (buf_info->types[reg_type] == BUF_TYPE_GEM) 793 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle, 794 filp); 795 else 796 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle, 797 false); 798 799 buf_info->reg_types[i] = REG_TYPE_NONE; 800 buf_info->handles[reg_type] = 0; 801 buf_info->types[reg_type] = 0; 802 memset(buf_desc, 0x00, sizeof(*buf_desc)); 803 } 804 805 buf_info->map_nr = 0; 806 } 807 808 static void g2d_dma_start(struct g2d_data *g2d, 809 struct g2d_runqueue_node *runqueue_node) 810 { 811 struct g2d_cmdlist_node *node = 812 list_first_entry(&runqueue_node->run_cmdlist, 813 struct g2d_cmdlist_node, list); 814 int ret; 815 816 ret = pm_runtime_get_sync(g2d->dev); 817 if (ret < 0) 818 return; 819 820 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); 821 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); 822 } 823 824 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d) 825 { 826 struct g2d_runqueue_node *runqueue_node; 827 828 if (list_empty(&g2d->runqueue)) 829 return NULL; 830 831 runqueue_node = list_first_entry(&g2d->runqueue, 832 struct g2d_runqueue_node, list); 833 list_del_init(&runqueue_node->list); 834 return runqueue_node; 835 } 836 837 static void g2d_free_runqueue_node(struct g2d_data *g2d, 838 struct g2d_runqueue_node *runqueue_node) 839 { 840 struct g2d_cmdlist_node *node; 841 842 if (!runqueue_node) 843 return; 844 845 mutex_lock(&g2d->cmdlist_mutex); 846 /* 847 * commands in run_cmdlist have been completed so unmap all gem 848 * objects in each command node so that they are unreferenced. 849 */ 850 list_for_each_entry(node, &runqueue_node->run_cmdlist, list) 851 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp); 852 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist); 853 mutex_unlock(&g2d->cmdlist_mutex); 854 855 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 856 } 857 858 static void g2d_exec_runqueue(struct g2d_data *g2d) 859 { 860 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 861 if (g2d->runqueue_node) 862 g2d_dma_start(g2d, g2d->runqueue_node); 863 } 864 865 static void g2d_runqueue_worker(struct work_struct *work) 866 { 867 struct g2d_data *g2d = container_of(work, struct g2d_data, 868 runqueue_work); 869 870 mutex_lock(&g2d->runqueue_mutex); 871 pm_runtime_put_sync(g2d->dev); 872 873 complete(&g2d->runqueue_node->complete); 874 if (g2d->runqueue_node->async) 875 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 876 877 if (g2d->suspended) 878 g2d->runqueue_node = NULL; 879 else 880 g2d_exec_runqueue(g2d); 881 mutex_unlock(&g2d->runqueue_mutex); 882 } 883 884 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no) 885 { 886 struct drm_device *drm_dev = g2d->subdrv.drm_dev; 887 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node; 888 struct drm_exynos_pending_g2d_event *e; 889 struct timeval now; 890 unsigned long flags; 891 892 if (list_empty(&runqueue_node->event_list)) 893 return; 894 895 e = list_first_entry(&runqueue_node->event_list, 896 struct drm_exynos_pending_g2d_event, base.link); 897 898 do_gettimeofday(&now); 899 e->event.tv_sec = now.tv_sec; 900 e->event.tv_usec = now.tv_usec; 901 e->event.cmdlist_no = cmdlist_no; 902 903 spin_lock_irqsave(&drm_dev->event_lock, flags); 904 list_move_tail(&e->base.link, &e->base.file_priv->event_list); 905 wake_up_interruptible(&e->base.file_priv->event_wait); 906 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 907 } 908 909 static irqreturn_t g2d_irq_handler(int irq, void *dev_id) 910 { 911 struct g2d_data *g2d = dev_id; 912 u32 pending; 913 914 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND); 915 if (pending) 916 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND); 917 918 if (pending & G2D_INTP_GCMD_FIN) { 919 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS); 920 921 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >> 922 G2D_DMA_LIST_DONE_COUNT_OFFSET; 923 924 g2d_finish_event(g2d, cmdlist_no); 925 926 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD); 927 if (!(pending & G2D_INTP_ACMD_FIN)) { 928 writel_relaxed(G2D_DMA_CONTINUE, 929 g2d->regs + G2D_DMA_COMMAND); 930 } 931 } 932 933 if (pending & G2D_INTP_ACMD_FIN) 934 queue_work(g2d->g2d_workq, &g2d->runqueue_work); 935 936 return IRQ_HANDLED; 937 } 938 939 static int g2d_check_reg_offset(struct device *dev, 940 struct g2d_cmdlist_node *node, 941 int nr, bool for_addr) 942 { 943 struct g2d_cmdlist *cmdlist = node->cmdlist; 944 int reg_offset; 945 int index; 946 int i; 947 948 for (i = 0; i < nr; i++) { 949 struct g2d_buf_info *buf_info = &node->buf_info; 950 struct g2d_buf_desc *buf_desc; 951 enum g2d_reg_type reg_type; 952 unsigned long value; 953 954 index = cmdlist->last - 2 * (i + 1); 955 956 reg_offset = cmdlist->data[index] & ~0xfffff000; 957 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END) 958 goto err; 959 if (reg_offset % 4) 960 goto err; 961 962 switch (reg_offset) { 963 case G2D_SRC_BASE_ADDR: 964 case G2D_SRC_PLANE2_BASE_ADDR: 965 case G2D_DST_BASE_ADDR: 966 case G2D_DST_PLANE2_BASE_ADDR: 967 case G2D_PAT_BASE_ADDR: 968 case G2D_MSK_BASE_ADDR: 969 if (!for_addr) 970 goto err; 971 972 reg_type = g2d_get_reg_type(reg_offset); 973 if (reg_type == REG_TYPE_NONE) 974 goto err; 975 976 /* check userptr buffer type. */ 977 if ((cmdlist->data[index] & ~0x7fffffff) >> 31) { 978 buf_info->types[reg_type] = BUF_TYPE_USERPTR; 979 cmdlist->data[index] &= ~G2D_BUF_USERPTR; 980 } else 981 buf_info->types[reg_type] = BUF_TYPE_GEM; 982 break; 983 case G2D_SRC_COLOR_MODE: 984 case G2D_DST_COLOR_MODE: 985 if (for_addr) 986 goto err; 987 988 reg_type = g2d_get_reg_type(reg_offset); 989 if (reg_type == REG_TYPE_NONE) 990 goto err; 991 992 buf_desc = &buf_info->descs[reg_type]; 993 value = cmdlist->data[index + 1]; 994 995 buf_desc->format = value & 0xf; 996 break; 997 case G2D_SRC_LEFT_TOP: 998 case G2D_DST_LEFT_TOP: 999 if (for_addr) 1000 goto err; 1001 1002 reg_type = g2d_get_reg_type(reg_offset); 1003 if (reg_type == REG_TYPE_NONE) 1004 goto err; 1005 1006 buf_desc = &buf_info->descs[reg_type]; 1007 value = cmdlist->data[index + 1]; 1008 1009 buf_desc->left_x = value & 0x1fff; 1010 buf_desc->top_y = (value & 0x1fff0000) >> 16; 1011 break; 1012 case G2D_SRC_RIGHT_BOTTOM: 1013 case G2D_DST_RIGHT_BOTTOM: 1014 if (for_addr) 1015 goto err; 1016 1017 reg_type = g2d_get_reg_type(reg_offset); 1018 if (reg_type == REG_TYPE_NONE) 1019 goto err; 1020 1021 buf_desc = &buf_info->descs[reg_type]; 1022 value = cmdlist->data[index + 1]; 1023 1024 buf_desc->right_x = value & 0x1fff; 1025 buf_desc->bottom_y = (value & 0x1fff0000) >> 16; 1026 break; 1027 default: 1028 if (for_addr) 1029 goto err; 1030 break; 1031 } 1032 } 1033 1034 return 0; 1035 1036 err: 1037 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]); 1038 return -EINVAL; 1039 } 1040 1041 /* ioctl functions */ 1042 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data, 1043 struct drm_file *file) 1044 { 1045 struct drm_exynos_g2d_get_ver *ver = data; 1046 1047 ver->major = G2D_HW_MAJOR_VER; 1048 ver->minor = G2D_HW_MINOR_VER; 1049 1050 return 0; 1051 } 1052 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl); 1053 1054 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, 1055 struct drm_file *file) 1056 { 1057 struct drm_exynos_file_private *file_priv = file->driver_priv; 1058 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1059 struct device *dev; 1060 struct g2d_data *g2d; 1061 struct drm_exynos_g2d_set_cmdlist *req = data; 1062 struct drm_exynos_g2d_cmd *cmd; 1063 struct drm_exynos_pending_g2d_event *e; 1064 struct g2d_cmdlist_node *node; 1065 struct g2d_cmdlist *cmdlist; 1066 unsigned long flags; 1067 int size; 1068 int ret; 1069 1070 if (!g2d_priv) 1071 return -ENODEV; 1072 1073 dev = g2d_priv->dev; 1074 if (!dev) 1075 return -ENODEV; 1076 1077 g2d = dev_get_drvdata(dev); 1078 if (!g2d) 1079 return -EFAULT; 1080 1081 node = g2d_get_cmdlist(g2d); 1082 if (!node) 1083 return -ENOMEM; 1084 1085 node->event = NULL; 1086 1087 if (req->event_type != G2D_EVENT_NOT) { 1088 spin_lock_irqsave(&drm_dev->event_lock, flags); 1089 if (file->event_space < sizeof(e->event)) { 1090 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1091 ret = -ENOMEM; 1092 goto err; 1093 } 1094 file->event_space -= sizeof(e->event); 1095 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1096 1097 e = kzalloc(sizeof(*node->event), GFP_KERNEL); 1098 if (!e) { 1099 spin_lock_irqsave(&drm_dev->event_lock, flags); 1100 file->event_space += sizeof(e->event); 1101 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1102 1103 ret = -ENOMEM; 1104 goto err; 1105 } 1106 1107 e->event.base.type = DRM_EXYNOS_G2D_EVENT; 1108 e->event.base.length = sizeof(e->event); 1109 e->event.user_data = req->user_data; 1110 e->base.event = &e->event.base; 1111 e->base.file_priv = file; 1112 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; 1113 1114 node->event = e; 1115 } 1116 1117 cmdlist = node->cmdlist; 1118 1119 cmdlist->last = 0; 1120 1121 /* 1122 * If don't clear SFR registers, the cmdlist is affected by register 1123 * values of previous cmdlist. G2D hw executes SFR clear command and 1124 * a next command at the same time then the next command is ignored and 1125 * is executed rightly from next next command, so needs a dummy command 1126 * to next command of SFR clear command. 1127 */ 1128 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET; 1129 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR; 1130 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR; 1131 cmdlist->data[cmdlist->last++] = 0; 1132 1133 /* 1134 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG 1135 * and GCF bit should be set to INTEN register if user wants 1136 * G2D interrupt event once current command list execution is 1137 * finished. 1138 * Otherwise only ACF bit should be set to INTEN register so 1139 * that one interrupt is occurred after all command lists 1140 * have been completed. 1141 */ 1142 if (node->event) { 1143 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1144 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF; 1145 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; 1146 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; 1147 } else { 1148 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1149 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF; 1150 } 1151 1152 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */ 1153 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; 1154 if (size > G2D_CMDLIST_DATA_NUM) { 1155 dev_err(dev, "cmdlist size is too big\n"); 1156 ret = -EINVAL; 1157 goto err_free_event; 1158 } 1159 1160 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd; 1161 1162 if (copy_from_user(cmdlist->data + cmdlist->last, 1163 (void __user *)cmd, 1164 sizeof(*cmd) * req->cmd_nr)) { 1165 ret = -EFAULT; 1166 goto err_free_event; 1167 } 1168 cmdlist->last += req->cmd_nr * 2; 1169 1170 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false); 1171 if (ret < 0) 1172 goto err_free_event; 1173 1174 node->buf_info.map_nr = req->cmd_buf_nr; 1175 if (req->cmd_buf_nr) { 1176 struct drm_exynos_g2d_cmd *cmd_buf; 1177 1178 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf; 1179 1180 if (copy_from_user(cmdlist->data + cmdlist->last, 1181 (void __user *)cmd_buf, 1182 sizeof(*cmd_buf) * req->cmd_buf_nr)) { 1183 ret = -EFAULT; 1184 goto err_free_event; 1185 } 1186 cmdlist->last += req->cmd_buf_nr * 2; 1187 1188 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true); 1189 if (ret < 0) 1190 goto err_free_event; 1191 1192 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file); 1193 if (ret < 0) 1194 goto err_unmap; 1195 } 1196 1197 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START; 1198 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT; 1199 1200 /* head */ 1201 cmdlist->head = cmdlist->last / 2; 1202 1203 /* tail */ 1204 cmdlist->data[cmdlist->last] = 0; 1205 1206 g2d_add_cmdlist_to_inuse(g2d_priv, node); 1207 1208 return 0; 1209 1210 err_unmap: 1211 g2d_unmap_cmdlist_gem(g2d, node, file); 1212 err_free_event: 1213 if (node->event) { 1214 spin_lock_irqsave(&drm_dev->event_lock, flags); 1215 file->event_space += sizeof(e->event); 1216 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1217 kfree(node->event); 1218 } 1219 err: 1220 g2d_put_cmdlist(g2d, node); 1221 return ret; 1222 } 1223 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl); 1224 1225 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, 1226 struct drm_file *file) 1227 { 1228 struct drm_exynos_file_private *file_priv = file->driver_priv; 1229 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1230 struct device *dev; 1231 struct g2d_data *g2d; 1232 struct drm_exynos_g2d_exec *req = data; 1233 struct g2d_runqueue_node *runqueue_node; 1234 struct list_head *run_cmdlist; 1235 struct list_head *event_list; 1236 1237 if (!g2d_priv) 1238 return -ENODEV; 1239 1240 dev = g2d_priv->dev; 1241 if (!dev) 1242 return -ENODEV; 1243 1244 g2d = dev_get_drvdata(dev); 1245 if (!g2d) 1246 return -EFAULT; 1247 1248 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); 1249 if (!runqueue_node) { 1250 dev_err(dev, "failed to allocate memory\n"); 1251 return -ENOMEM; 1252 } 1253 run_cmdlist = &runqueue_node->run_cmdlist; 1254 event_list = &runqueue_node->event_list; 1255 INIT_LIST_HEAD(run_cmdlist); 1256 INIT_LIST_HEAD(event_list); 1257 init_completion(&runqueue_node->complete); 1258 runqueue_node->async = req->async; 1259 1260 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist); 1261 list_splice_init(&g2d_priv->event_list, event_list); 1262 1263 if (list_empty(run_cmdlist)) { 1264 dev_err(dev, "there is no inuse cmdlist\n"); 1265 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 1266 return -EPERM; 1267 } 1268 1269 mutex_lock(&g2d->runqueue_mutex); 1270 runqueue_node->pid = current->pid; 1271 runqueue_node->filp = file; 1272 list_add_tail(&runqueue_node->list, &g2d->runqueue); 1273 if (!g2d->runqueue_node) 1274 g2d_exec_runqueue(g2d); 1275 mutex_unlock(&g2d->runqueue_mutex); 1276 1277 if (runqueue_node->async) 1278 goto out; 1279 1280 wait_for_completion(&runqueue_node->complete); 1281 g2d_free_runqueue_node(g2d, runqueue_node); 1282 1283 out: 1284 return 0; 1285 } 1286 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl); 1287 1288 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 1289 { 1290 struct g2d_data *g2d; 1291 int ret; 1292 1293 g2d = dev_get_drvdata(dev); 1294 if (!g2d) 1295 return -EFAULT; 1296 1297 /* allocate dma-aware cmdlist buffer. */ 1298 ret = g2d_init_cmdlist(g2d); 1299 if (ret < 0) { 1300 dev_err(dev, "cmdlist init failed\n"); 1301 return ret; 1302 } 1303 1304 if (!is_drm_iommu_supported(drm_dev)) 1305 return 0; 1306 1307 ret = drm_iommu_attach_device(drm_dev, dev); 1308 if (ret < 0) { 1309 dev_err(dev, "failed to enable iommu.\n"); 1310 g2d_fini_cmdlist(g2d); 1311 } 1312 1313 return ret; 1314 1315 } 1316 1317 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev) 1318 { 1319 if (!is_drm_iommu_supported(drm_dev)) 1320 return; 1321 1322 drm_iommu_detach_device(drm_dev, dev); 1323 } 1324 1325 static int g2d_open(struct drm_device *drm_dev, struct device *dev, 1326 struct drm_file *file) 1327 { 1328 struct drm_exynos_file_private *file_priv = file->driver_priv; 1329 struct exynos_drm_g2d_private *g2d_priv; 1330 1331 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL); 1332 if (!g2d_priv) 1333 return -ENOMEM; 1334 1335 g2d_priv->dev = dev; 1336 file_priv->g2d_priv = g2d_priv; 1337 1338 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist); 1339 INIT_LIST_HEAD(&g2d_priv->event_list); 1340 INIT_LIST_HEAD(&g2d_priv->userptr_list); 1341 1342 return 0; 1343 } 1344 1345 static void g2d_close(struct drm_device *drm_dev, struct device *dev, 1346 struct drm_file *file) 1347 { 1348 struct drm_exynos_file_private *file_priv = file->driver_priv; 1349 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1350 struct g2d_data *g2d; 1351 struct g2d_cmdlist_node *node, *n; 1352 1353 if (!dev) 1354 return; 1355 1356 g2d = dev_get_drvdata(dev); 1357 if (!g2d) 1358 return; 1359 1360 mutex_lock(&g2d->cmdlist_mutex); 1361 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) { 1362 /* 1363 * unmap all gem objects not completed. 1364 * 1365 * P.S. if current process was terminated forcely then 1366 * there may be some commands in inuse_cmdlist so unmap 1367 * them. 1368 */ 1369 g2d_unmap_cmdlist_gem(g2d, node, file); 1370 list_move_tail(&node->list, &g2d->free_cmdlist); 1371 } 1372 mutex_unlock(&g2d->cmdlist_mutex); 1373 1374 /* release all g2d_userptr in pool. */ 1375 g2d_userptr_free_all(drm_dev, g2d, file); 1376 1377 kfree(file_priv->g2d_priv); 1378 } 1379 1380 static int g2d_probe(struct platform_device *pdev) 1381 { 1382 struct device *dev = &pdev->dev; 1383 struct resource *res; 1384 struct g2d_data *g2d; 1385 struct exynos_drm_subdrv *subdrv; 1386 int ret; 1387 1388 g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL); 1389 if (!g2d) 1390 return -ENOMEM; 1391 1392 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab", 1393 sizeof(struct g2d_runqueue_node), 0, 0, NULL); 1394 if (!g2d->runqueue_slab) 1395 return -ENOMEM; 1396 1397 g2d->dev = dev; 1398 1399 g2d->g2d_workq = create_singlethread_workqueue("g2d"); 1400 if (!g2d->g2d_workq) { 1401 dev_err(dev, "failed to create workqueue\n"); 1402 ret = -EINVAL; 1403 goto err_destroy_slab; 1404 } 1405 1406 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker); 1407 INIT_LIST_HEAD(&g2d->free_cmdlist); 1408 INIT_LIST_HEAD(&g2d->runqueue); 1409 1410 mutex_init(&g2d->cmdlist_mutex); 1411 mutex_init(&g2d->runqueue_mutex); 1412 1413 g2d->gate_clk = devm_clk_get(dev, "fimg2d"); 1414 if (IS_ERR(g2d->gate_clk)) { 1415 dev_err(dev, "failed to get gate clock\n"); 1416 ret = PTR_ERR(g2d->gate_clk); 1417 goto err_destroy_workqueue; 1418 } 1419 1420 pm_runtime_enable(dev); 1421 1422 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1423 1424 g2d->regs = devm_ioremap_resource(dev, res); 1425 if (IS_ERR(g2d->regs)) { 1426 ret = PTR_ERR(g2d->regs); 1427 goto err_put_clk; 1428 } 1429 1430 g2d->irq = platform_get_irq(pdev, 0); 1431 if (g2d->irq < 0) { 1432 dev_err(dev, "failed to get irq\n"); 1433 ret = g2d->irq; 1434 goto err_put_clk; 1435 } 1436 1437 ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0, 1438 "drm_g2d", g2d); 1439 if (ret < 0) { 1440 dev_err(dev, "irq request failed\n"); 1441 goto err_put_clk; 1442 } 1443 1444 g2d->max_pool = MAX_POOL; 1445 1446 platform_set_drvdata(pdev, g2d); 1447 1448 subdrv = &g2d->subdrv; 1449 subdrv->dev = dev; 1450 subdrv->probe = g2d_subdrv_probe; 1451 subdrv->remove = g2d_subdrv_remove; 1452 subdrv->open = g2d_open; 1453 subdrv->close = g2d_close; 1454 1455 ret = exynos_drm_subdrv_register(subdrv); 1456 if (ret < 0) { 1457 dev_err(dev, "failed to register drm g2d device\n"); 1458 goto err_put_clk; 1459 } 1460 1461 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n", 1462 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); 1463 1464 return 0; 1465 1466 err_put_clk: 1467 pm_runtime_disable(dev); 1468 err_destroy_workqueue: 1469 destroy_workqueue(g2d->g2d_workq); 1470 err_destroy_slab: 1471 kmem_cache_destroy(g2d->runqueue_slab); 1472 return ret; 1473 } 1474 1475 static int g2d_remove(struct platform_device *pdev) 1476 { 1477 struct g2d_data *g2d = platform_get_drvdata(pdev); 1478 1479 cancel_work_sync(&g2d->runqueue_work); 1480 exynos_drm_subdrv_unregister(&g2d->subdrv); 1481 1482 while (g2d->runqueue_node) { 1483 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 1484 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 1485 } 1486 1487 pm_runtime_disable(&pdev->dev); 1488 1489 g2d_fini_cmdlist(g2d); 1490 destroy_workqueue(g2d->g2d_workq); 1491 kmem_cache_destroy(g2d->runqueue_slab); 1492 1493 return 0; 1494 } 1495 1496 #ifdef CONFIG_PM_SLEEP 1497 static int g2d_suspend(struct device *dev) 1498 { 1499 struct g2d_data *g2d = dev_get_drvdata(dev); 1500 1501 mutex_lock(&g2d->runqueue_mutex); 1502 g2d->suspended = true; 1503 mutex_unlock(&g2d->runqueue_mutex); 1504 1505 while (g2d->runqueue_node) 1506 /* FIXME: good range? */ 1507 usleep_range(500, 1000); 1508 1509 flush_work(&g2d->runqueue_work); 1510 1511 return 0; 1512 } 1513 1514 static int g2d_resume(struct device *dev) 1515 { 1516 struct g2d_data *g2d = dev_get_drvdata(dev); 1517 1518 g2d->suspended = false; 1519 g2d_exec_runqueue(g2d); 1520 1521 return 0; 1522 } 1523 #endif 1524 1525 #ifdef CONFIG_PM_RUNTIME 1526 static int g2d_runtime_suspend(struct device *dev) 1527 { 1528 struct g2d_data *g2d = dev_get_drvdata(dev); 1529 1530 clk_disable_unprepare(g2d->gate_clk); 1531 1532 return 0; 1533 } 1534 1535 static int g2d_runtime_resume(struct device *dev) 1536 { 1537 struct g2d_data *g2d = dev_get_drvdata(dev); 1538 int ret; 1539 1540 ret = clk_prepare_enable(g2d->gate_clk); 1541 if (ret < 0) 1542 dev_warn(dev, "failed to enable clock.\n"); 1543 1544 return ret; 1545 } 1546 #endif 1547 1548 static const struct dev_pm_ops g2d_pm_ops = { 1549 SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume) 1550 SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL) 1551 }; 1552 1553 static const struct of_device_id exynos_g2d_match[] = { 1554 { .compatible = "samsung,exynos5250-g2d" }, 1555 { .compatible = "samsung,exynos4212-g2d" }, 1556 {}, 1557 }; 1558 MODULE_DEVICE_TABLE(of, exynos_g2d_match); 1559 1560 struct platform_driver g2d_driver = { 1561 .probe = g2d_probe, 1562 .remove = g2d_remove, 1563 .driver = { 1564 .name = "s5p-g2d", 1565 .owner = THIS_MODULE, 1566 .pm = &g2d_pm_ops, 1567 .of_match_table = exynos_g2d_match, 1568 }, 1569 }; 1570