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 #include <linux/of.h> 23 24 #include <drm/drmP.h> 25 #include <drm/exynos_drm.h> 26 #include "exynos_drm_drv.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 if (!g2d_userptr->out_of_list) 387 list_del_init(&g2d_userptr->list); 388 389 sg_free_table(g2d_userptr->sgt); 390 kfree(g2d_userptr->sgt); 391 392 drm_free_large(g2d_userptr->pages); 393 kfree(g2d_userptr); 394 } 395 396 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev, 397 unsigned long userptr, 398 unsigned long size, 399 struct drm_file *filp, 400 unsigned long *obj) 401 { 402 struct drm_exynos_file_private *file_priv = filp->driver_priv; 403 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 404 struct g2d_cmdlist_userptr *g2d_userptr; 405 struct g2d_data *g2d; 406 struct page **pages; 407 struct sg_table *sgt; 408 struct vm_area_struct *vma; 409 unsigned long start, end; 410 unsigned int npages, offset; 411 int ret; 412 413 if (!size) { 414 DRM_ERROR("invalid userptr size.\n"); 415 return ERR_PTR(-EINVAL); 416 } 417 418 g2d = dev_get_drvdata(g2d_priv->dev); 419 420 /* check if userptr already exists in userptr_list. */ 421 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) { 422 if (g2d_userptr->userptr == userptr) { 423 /* 424 * also check size because there could be same address 425 * and different size. 426 */ 427 if (g2d_userptr->size == size) { 428 atomic_inc(&g2d_userptr->refcount); 429 *obj = (unsigned long)g2d_userptr; 430 431 return &g2d_userptr->dma_addr; 432 } 433 434 /* 435 * at this moment, maybe g2d dma is accessing this 436 * g2d_userptr memory region so just remove this 437 * g2d_userptr object from userptr_list not to be 438 * referred again and also except it the userptr 439 * pool to be released after the dma access completion. 440 */ 441 g2d_userptr->out_of_list = true; 442 g2d_userptr->in_pool = false; 443 list_del_init(&g2d_userptr->list); 444 445 break; 446 } 447 } 448 449 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL); 450 if (!g2d_userptr) { 451 DRM_ERROR("failed to allocate g2d_userptr.\n"); 452 return ERR_PTR(-ENOMEM); 453 } 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 vma = find_vma(current->mm, userptr); 471 if (!vma) { 472 DRM_ERROR("failed to get vm region.\n"); 473 ret = -EFAULT; 474 goto err_free_pages; 475 } 476 477 if (vma->vm_end < userptr + size) { 478 DRM_ERROR("vma is too small.\n"); 479 ret = -EFAULT; 480 goto err_free_pages; 481 } 482 483 g2d_userptr->vma = exynos_gem_get_vma(vma); 484 if (!g2d_userptr->vma) { 485 DRM_ERROR("failed to copy vma.\n"); 486 ret = -ENOMEM; 487 goto err_free_pages; 488 } 489 490 g2d_userptr->size = size; 491 492 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK, 493 npages, pages, vma); 494 if (ret < 0) { 495 DRM_ERROR("failed to get user pages from userptr.\n"); 496 goto err_put_vma; 497 } 498 499 g2d_userptr->pages = pages; 500 501 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); 502 if (!sgt) { 503 DRM_ERROR("failed to allocate sg table.\n"); 504 ret = -ENOMEM; 505 goto err_free_userptr; 506 } 507 508 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset, 509 size, GFP_KERNEL); 510 if (ret < 0) { 511 DRM_ERROR("failed to get sgt from pages.\n"); 512 goto err_free_sgt; 513 } 514 515 g2d_userptr->sgt = sgt; 516 517 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt, 518 DMA_BIDIRECTIONAL); 519 if (ret < 0) { 520 DRM_ERROR("failed to map sgt with dma region.\n"); 521 goto err_sg_free_table; 522 } 523 524 g2d_userptr->dma_addr = sgt->sgl[0].dma_address; 525 g2d_userptr->userptr = userptr; 526 527 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list); 528 529 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) { 530 g2d->current_pool += npages << PAGE_SHIFT; 531 g2d_userptr->in_pool = true; 532 } 533 534 *obj = (unsigned long)g2d_userptr; 535 536 return &g2d_userptr->dma_addr; 537 538 err_sg_free_table: 539 sg_free_table(sgt); 540 541 err_free_sgt: 542 kfree(sgt); 543 544 err_free_userptr: 545 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 546 g2d_userptr->npages, 547 g2d_userptr->vma); 548 549 err_put_vma: 550 exynos_gem_put_vma(g2d_userptr->vma); 551 552 err_free_pages: 553 drm_free_large(pages); 554 555 err_free: 556 kfree(g2d_userptr); 557 558 return ERR_PTR(ret); 559 } 560 561 static void g2d_userptr_free_all(struct drm_device *drm_dev, 562 struct g2d_data *g2d, 563 struct drm_file *filp) 564 { 565 struct drm_exynos_file_private *file_priv = filp->driver_priv; 566 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 567 struct g2d_cmdlist_userptr *g2d_userptr, *n; 568 569 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list) 570 if (g2d_userptr->in_pool) 571 g2d_userptr_put_dma_addr(drm_dev, 572 (unsigned long)g2d_userptr, 573 true); 574 575 g2d->current_pool = 0; 576 } 577 578 static enum g2d_reg_type g2d_get_reg_type(int reg_offset) 579 { 580 enum g2d_reg_type reg_type; 581 582 switch (reg_offset) { 583 case G2D_SRC_BASE_ADDR: 584 case G2D_SRC_COLOR_MODE: 585 case G2D_SRC_LEFT_TOP: 586 case G2D_SRC_RIGHT_BOTTOM: 587 reg_type = REG_TYPE_SRC; 588 break; 589 case G2D_SRC_PLANE2_BASE_ADDR: 590 reg_type = REG_TYPE_SRC_PLANE2; 591 break; 592 case G2D_DST_BASE_ADDR: 593 case G2D_DST_COLOR_MODE: 594 case G2D_DST_LEFT_TOP: 595 case G2D_DST_RIGHT_BOTTOM: 596 reg_type = REG_TYPE_DST; 597 break; 598 case G2D_DST_PLANE2_BASE_ADDR: 599 reg_type = REG_TYPE_DST_PLANE2; 600 break; 601 case G2D_PAT_BASE_ADDR: 602 reg_type = REG_TYPE_PAT; 603 break; 604 case G2D_MSK_BASE_ADDR: 605 reg_type = REG_TYPE_MSK; 606 break; 607 default: 608 reg_type = REG_TYPE_NONE; 609 DRM_ERROR("Unknown register offset![%d]\n", reg_offset); 610 break; 611 }; 612 613 return reg_type; 614 } 615 616 static unsigned long g2d_get_buf_bpp(unsigned int format) 617 { 618 unsigned long bpp; 619 620 switch (format) { 621 case G2D_FMT_XRGB8888: 622 case G2D_FMT_ARGB8888: 623 bpp = 4; 624 break; 625 case G2D_FMT_RGB565: 626 case G2D_FMT_XRGB1555: 627 case G2D_FMT_ARGB1555: 628 case G2D_FMT_XRGB4444: 629 case G2D_FMT_ARGB4444: 630 bpp = 2; 631 break; 632 case G2D_FMT_PACKED_RGB888: 633 bpp = 3; 634 break; 635 default: 636 bpp = 1; 637 break; 638 } 639 640 return bpp; 641 } 642 643 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc, 644 enum g2d_reg_type reg_type, 645 unsigned long size) 646 { 647 unsigned int width, height; 648 unsigned long area; 649 650 /* 651 * check source and destination buffers only. 652 * so the others are always valid. 653 */ 654 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST) 655 return true; 656 657 width = buf_desc->right_x - buf_desc->left_x; 658 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) { 659 DRM_ERROR("width[%u] is out of range!\n", width); 660 return false; 661 } 662 663 height = buf_desc->bottom_y - buf_desc->top_y; 664 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) { 665 DRM_ERROR("height[%u] is out of range!\n", height); 666 return false; 667 } 668 669 area = (unsigned long)width * (unsigned long)height * 670 g2d_get_buf_bpp(buf_desc->format); 671 if (area > size) { 672 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size); 673 return false; 674 } 675 676 return true; 677 } 678 679 static int g2d_map_cmdlist_gem(struct g2d_data *g2d, 680 struct g2d_cmdlist_node *node, 681 struct drm_device *drm_dev, 682 struct drm_file *file) 683 { 684 struct g2d_cmdlist *cmdlist = node->cmdlist; 685 struct g2d_buf_info *buf_info = &node->buf_info; 686 int offset; 687 int ret; 688 int i; 689 690 for (i = 0; i < buf_info->map_nr; i++) { 691 struct g2d_buf_desc *buf_desc; 692 enum g2d_reg_type reg_type; 693 int reg_pos; 694 unsigned long handle; 695 dma_addr_t *addr; 696 697 reg_pos = cmdlist->last - 2 * (i + 1); 698 699 offset = cmdlist->data[reg_pos]; 700 handle = cmdlist->data[reg_pos + 1]; 701 702 reg_type = g2d_get_reg_type(offset); 703 if (reg_type == REG_TYPE_NONE) { 704 ret = -EFAULT; 705 goto err; 706 } 707 708 buf_desc = &buf_info->descs[reg_type]; 709 710 if (buf_info->types[reg_type] == BUF_TYPE_GEM) { 711 unsigned long size; 712 713 size = exynos_drm_gem_get_size(drm_dev, handle, file); 714 if (!size) { 715 ret = -EFAULT; 716 goto err; 717 } 718 719 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 720 size)) { 721 ret = -EFAULT; 722 goto err; 723 } 724 725 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, 726 file); 727 if (IS_ERR(addr)) { 728 ret = -EFAULT; 729 goto err; 730 } 731 } else { 732 struct drm_exynos_g2d_userptr g2d_userptr; 733 734 if (copy_from_user(&g2d_userptr, (void __user *)handle, 735 sizeof(struct drm_exynos_g2d_userptr))) { 736 ret = -EFAULT; 737 goto err; 738 } 739 740 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 741 g2d_userptr.size)) { 742 ret = -EFAULT; 743 goto err; 744 } 745 746 addr = g2d_userptr_get_dma_addr(drm_dev, 747 g2d_userptr.userptr, 748 g2d_userptr.size, 749 file, 750 &handle); 751 if (IS_ERR(addr)) { 752 ret = -EFAULT; 753 goto err; 754 } 755 } 756 757 cmdlist->data[reg_pos + 1] = *addr; 758 buf_info->reg_types[i] = reg_type; 759 buf_info->handles[reg_type] = handle; 760 } 761 762 return 0; 763 764 err: 765 buf_info->map_nr = i; 766 return ret; 767 } 768 769 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d, 770 struct g2d_cmdlist_node *node, 771 struct drm_file *filp) 772 { 773 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 774 struct g2d_buf_info *buf_info = &node->buf_info; 775 int i; 776 777 for (i = 0; i < buf_info->map_nr; i++) { 778 struct g2d_buf_desc *buf_desc; 779 enum g2d_reg_type reg_type; 780 unsigned long handle; 781 782 reg_type = buf_info->reg_types[i]; 783 784 buf_desc = &buf_info->descs[reg_type]; 785 handle = buf_info->handles[reg_type]; 786 787 if (buf_info->types[reg_type] == BUF_TYPE_GEM) 788 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle, 789 filp); 790 else 791 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle, 792 false); 793 794 buf_info->reg_types[i] = REG_TYPE_NONE; 795 buf_info->handles[reg_type] = 0; 796 buf_info->types[reg_type] = 0; 797 memset(buf_desc, 0x00, sizeof(*buf_desc)); 798 } 799 800 buf_info->map_nr = 0; 801 } 802 803 static void g2d_dma_start(struct g2d_data *g2d, 804 struct g2d_runqueue_node *runqueue_node) 805 { 806 struct g2d_cmdlist_node *node = 807 list_first_entry(&runqueue_node->run_cmdlist, 808 struct g2d_cmdlist_node, list); 809 810 pm_runtime_get_sync(g2d->dev); 811 clk_enable(g2d->gate_clk); 812 813 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); 814 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); 815 } 816 817 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d) 818 { 819 struct g2d_runqueue_node *runqueue_node; 820 821 if (list_empty(&g2d->runqueue)) 822 return NULL; 823 824 runqueue_node = list_first_entry(&g2d->runqueue, 825 struct g2d_runqueue_node, list); 826 list_del_init(&runqueue_node->list); 827 return runqueue_node; 828 } 829 830 static void g2d_free_runqueue_node(struct g2d_data *g2d, 831 struct g2d_runqueue_node *runqueue_node) 832 { 833 struct g2d_cmdlist_node *node; 834 835 if (!runqueue_node) 836 return; 837 838 mutex_lock(&g2d->cmdlist_mutex); 839 /* 840 * commands in run_cmdlist have been completed so unmap all gem 841 * objects in each command node so that they are unreferenced. 842 */ 843 list_for_each_entry(node, &runqueue_node->run_cmdlist, list) 844 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp); 845 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist); 846 mutex_unlock(&g2d->cmdlist_mutex); 847 848 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 849 } 850 851 static void g2d_exec_runqueue(struct g2d_data *g2d) 852 { 853 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 854 if (g2d->runqueue_node) 855 g2d_dma_start(g2d, g2d->runqueue_node); 856 } 857 858 static void g2d_runqueue_worker(struct work_struct *work) 859 { 860 struct g2d_data *g2d = container_of(work, struct g2d_data, 861 runqueue_work); 862 863 mutex_lock(&g2d->runqueue_mutex); 864 clk_disable(g2d->gate_clk); 865 pm_runtime_put_sync(g2d->dev); 866 867 complete(&g2d->runqueue_node->complete); 868 if (g2d->runqueue_node->async) 869 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 870 871 if (g2d->suspended) 872 g2d->runqueue_node = NULL; 873 else 874 g2d_exec_runqueue(g2d); 875 mutex_unlock(&g2d->runqueue_mutex); 876 } 877 878 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no) 879 { 880 struct drm_device *drm_dev = g2d->subdrv.drm_dev; 881 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node; 882 struct drm_exynos_pending_g2d_event *e; 883 struct timeval now; 884 unsigned long flags; 885 886 if (list_empty(&runqueue_node->event_list)) 887 return; 888 889 e = list_first_entry(&runqueue_node->event_list, 890 struct drm_exynos_pending_g2d_event, base.link); 891 892 do_gettimeofday(&now); 893 e->event.tv_sec = now.tv_sec; 894 e->event.tv_usec = now.tv_usec; 895 e->event.cmdlist_no = cmdlist_no; 896 897 spin_lock_irqsave(&drm_dev->event_lock, flags); 898 list_move_tail(&e->base.link, &e->base.file_priv->event_list); 899 wake_up_interruptible(&e->base.file_priv->event_wait); 900 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 901 } 902 903 static irqreturn_t g2d_irq_handler(int irq, void *dev_id) 904 { 905 struct g2d_data *g2d = dev_id; 906 u32 pending; 907 908 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND); 909 if (pending) 910 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND); 911 912 if (pending & G2D_INTP_GCMD_FIN) { 913 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS); 914 915 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >> 916 G2D_DMA_LIST_DONE_COUNT_OFFSET; 917 918 g2d_finish_event(g2d, cmdlist_no); 919 920 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD); 921 if (!(pending & G2D_INTP_ACMD_FIN)) { 922 writel_relaxed(G2D_DMA_CONTINUE, 923 g2d->regs + G2D_DMA_COMMAND); 924 } 925 } 926 927 if (pending & G2D_INTP_ACMD_FIN) 928 queue_work(g2d->g2d_workq, &g2d->runqueue_work); 929 930 return IRQ_HANDLED; 931 } 932 933 static int g2d_check_reg_offset(struct device *dev, 934 struct g2d_cmdlist_node *node, 935 int nr, bool for_addr) 936 { 937 struct g2d_cmdlist *cmdlist = node->cmdlist; 938 int reg_offset; 939 int index; 940 int i; 941 942 for (i = 0; i < nr; i++) { 943 struct g2d_buf_info *buf_info = &node->buf_info; 944 struct g2d_buf_desc *buf_desc; 945 enum g2d_reg_type reg_type; 946 unsigned long value; 947 948 index = cmdlist->last - 2 * (i + 1); 949 950 reg_offset = cmdlist->data[index] & ~0xfffff000; 951 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END) 952 goto err; 953 if (reg_offset % 4) 954 goto err; 955 956 switch (reg_offset) { 957 case G2D_SRC_BASE_ADDR: 958 case G2D_SRC_PLANE2_BASE_ADDR: 959 case G2D_DST_BASE_ADDR: 960 case G2D_DST_PLANE2_BASE_ADDR: 961 case G2D_PAT_BASE_ADDR: 962 case G2D_MSK_BASE_ADDR: 963 if (!for_addr) 964 goto err; 965 966 reg_type = g2d_get_reg_type(reg_offset); 967 if (reg_type == REG_TYPE_NONE) 968 goto err; 969 970 /* check userptr buffer type. */ 971 if ((cmdlist->data[index] & ~0x7fffffff) >> 31) { 972 buf_info->types[reg_type] = BUF_TYPE_USERPTR; 973 cmdlist->data[index] &= ~G2D_BUF_USERPTR; 974 } else 975 buf_info->types[reg_type] = BUF_TYPE_GEM; 976 break; 977 case G2D_SRC_COLOR_MODE: 978 case G2D_DST_COLOR_MODE: 979 if (for_addr) 980 goto err; 981 982 reg_type = g2d_get_reg_type(reg_offset); 983 if (reg_type == REG_TYPE_NONE) 984 goto err; 985 986 buf_desc = &buf_info->descs[reg_type]; 987 value = cmdlist->data[index + 1]; 988 989 buf_desc->format = value & 0xf; 990 break; 991 case G2D_SRC_LEFT_TOP: 992 case G2D_DST_LEFT_TOP: 993 if (for_addr) 994 goto err; 995 996 reg_type = g2d_get_reg_type(reg_offset); 997 if (reg_type == REG_TYPE_NONE) 998 goto err; 999 1000 buf_desc = &buf_info->descs[reg_type]; 1001 value = cmdlist->data[index + 1]; 1002 1003 buf_desc->left_x = value & 0x1fff; 1004 buf_desc->top_y = (value & 0x1fff0000) >> 16; 1005 break; 1006 case G2D_SRC_RIGHT_BOTTOM: 1007 case G2D_DST_RIGHT_BOTTOM: 1008 if (for_addr) 1009 goto err; 1010 1011 reg_type = g2d_get_reg_type(reg_offset); 1012 if (reg_type == REG_TYPE_NONE) 1013 goto err; 1014 1015 buf_desc = &buf_info->descs[reg_type]; 1016 value = cmdlist->data[index + 1]; 1017 1018 buf_desc->right_x = value & 0x1fff; 1019 buf_desc->bottom_y = (value & 0x1fff0000) >> 16; 1020 break; 1021 default: 1022 if (for_addr) 1023 goto err; 1024 break; 1025 } 1026 } 1027 1028 return 0; 1029 1030 err: 1031 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]); 1032 return -EINVAL; 1033 } 1034 1035 /* ioctl functions */ 1036 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data, 1037 struct drm_file *file) 1038 { 1039 struct drm_exynos_g2d_get_ver *ver = data; 1040 1041 ver->major = G2D_HW_MAJOR_VER; 1042 ver->minor = G2D_HW_MINOR_VER; 1043 1044 return 0; 1045 } 1046 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl); 1047 1048 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, 1049 struct drm_file *file) 1050 { 1051 struct drm_exynos_file_private *file_priv = file->driver_priv; 1052 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1053 struct device *dev = g2d_priv->dev; 1054 struct g2d_data *g2d; 1055 struct drm_exynos_g2d_set_cmdlist *req = data; 1056 struct drm_exynos_g2d_cmd *cmd; 1057 struct drm_exynos_pending_g2d_event *e; 1058 struct g2d_cmdlist_node *node; 1059 struct g2d_cmdlist *cmdlist; 1060 unsigned long flags; 1061 int size; 1062 int ret; 1063 1064 if (!dev) 1065 return -ENODEV; 1066 1067 g2d = dev_get_drvdata(dev); 1068 if (!g2d) 1069 return -EFAULT; 1070 1071 node = g2d_get_cmdlist(g2d); 1072 if (!node) 1073 return -ENOMEM; 1074 1075 node->event = NULL; 1076 1077 if (req->event_type != G2D_EVENT_NOT) { 1078 spin_lock_irqsave(&drm_dev->event_lock, flags); 1079 if (file->event_space < sizeof(e->event)) { 1080 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1081 ret = -ENOMEM; 1082 goto err; 1083 } 1084 file->event_space -= sizeof(e->event); 1085 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1086 1087 e = kzalloc(sizeof(*node->event), GFP_KERNEL); 1088 if (!e) { 1089 dev_err(dev, "failed to allocate event\n"); 1090 1091 spin_lock_irqsave(&drm_dev->event_lock, flags); 1092 file->event_space += sizeof(e->event); 1093 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1094 1095 ret = -ENOMEM; 1096 goto err; 1097 } 1098 1099 e->event.base.type = DRM_EXYNOS_G2D_EVENT; 1100 e->event.base.length = sizeof(e->event); 1101 e->event.user_data = req->user_data; 1102 e->base.event = &e->event.base; 1103 e->base.file_priv = file; 1104 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; 1105 1106 node->event = e; 1107 } 1108 1109 cmdlist = node->cmdlist; 1110 1111 cmdlist->last = 0; 1112 1113 /* 1114 * If don't clear SFR registers, the cmdlist is affected by register 1115 * values of previous cmdlist. G2D hw executes SFR clear command and 1116 * a next command at the same time then the next command is ignored and 1117 * is executed rightly from next next command, so needs a dummy command 1118 * to next command of SFR clear command. 1119 */ 1120 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET; 1121 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR; 1122 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR; 1123 cmdlist->data[cmdlist->last++] = 0; 1124 1125 /* 1126 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG 1127 * and GCF bit should be set to INTEN register if user wants 1128 * G2D interrupt event once current command list execution is 1129 * finished. 1130 * Otherwise only ACF bit should be set to INTEN register so 1131 * that one interrupt is occured after all command lists 1132 * have been completed. 1133 */ 1134 if (node->event) { 1135 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1136 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF; 1137 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; 1138 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; 1139 } else { 1140 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1141 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF; 1142 } 1143 1144 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */ 1145 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; 1146 if (size > G2D_CMDLIST_DATA_NUM) { 1147 dev_err(dev, "cmdlist size is too big\n"); 1148 ret = -EINVAL; 1149 goto err_free_event; 1150 } 1151 1152 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd; 1153 1154 if (copy_from_user(cmdlist->data + cmdlist->last, 1155 (void __user *)cmd, 1156 sizeof(*cmd) * req->cmd_nr)) { 1157 ret = -EFAULT; 1158 goto err_free_event; 1159 } 1160 cmdlist->last += req->cmd_nr * 2; 1161 1162 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false); 1163 if (ret < 0) 1164 goto err_free_event; 1165 1166 node->buf_info.map_nr = req->cmd_buf_nr; 1167 if (req->cmd_buf_nr) { 1168 struct drm_exynos_g2d_cmd *cmd_buf; 1169 1170 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf; 1171 1172 if (copy_from_user(cmdlist->data + cmdlist->last, 1173 (void __user *)cmd_buf, 1174 sizeof(*cmd_buf) * req->cmd_buf_nr)) { 1175 ret = -EFAULT; 1176 goto err_free_event; 1177 } 1178 cmdlist->last += req->cmd_buf_nr * 2; 1179 1180 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true); 1181 if (ret < 0) 1182 goto err_free_event; 1183 1184 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file); 1185 if (ret < 0) 1186 goto err_unmap; 1187 } 1188 1189 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START; 1190 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT; 1191 1192 /* head */ 1193 cmdlist->head = cmdlist->last / 2; 1194 1195 /* tail */ 1196 cmdlist->data[cmdlist->last] = 0; 1197 1198 g2d_add_cmdlist_to_inuse(g2d_priv, node); 1199 1200 return 0; 1201 1202 err_unmap: 1203 g2d_unmap_cmdlist_gem(g2d, node, file); 1204 err_free_event: 1205 if (node->event) { 1206 spin_lock_irqsave(&drm_dev->event_lock, flags); 1207 file->event_space += sizeof(e->event); 1208 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1209 kfree(node->event); 1210 } 1211 err: 1212 g2d_put_cmdlist(g2d, node); 1213 return ret; 1214 } 1215 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl); 1216 1217 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, 1218 struct drm_file *file) 1219 { 1220 struct drm_exynos_file_private *file_priv = file->driver_priv; 1221 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1222 struct device *dev = g2d_priv->dev; 1223 struct g2d_data *g2d; 1224 struct drm_exynos_g2d_exec *req = data; 1225 struct g2d_runqueue_node *runqueue_node; 1226 struct list_head *run_cmdlist; 1227 struct list_head *event_list; 1228 1229 if (!dev) 1230 return -ENODEV; 1231 1232 g2d = dev_get_drvdata(dev); 1233 if (!g2d) 1234 return -EFAULT; 1235 1236 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); 1237 if (!runqueue_node) { 1238 dev_err(dev, "failed to allocate memory\n"); 1239 return -ENOMEM; 1240 } 1241 run_cmdlist = &runqueue_node->run_cmdlist; 1242 event_list = &runqueue_node->event_list; 1243 INIT_LIST_HEAD(run_cmdlist); 1244 INIT_LIST_HEAD(event_list); 1245 init_completion(&runqueue_node->complete); 1246 runqueue_node->async = req->async; 1247 1248 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist); 1249 list_splice_init(&g2d_priv->event_list, event_list); 1250 1251 if (list_empty(run_cmdlist)) { 1252 dev_err(dev, "there is no inuse cmdlist\n"); 1253 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 1254 return -EPERM; 1255 } 1256 1257 mutex_lock(&g2d->runqueue_mutex); 1258 runqueue_node->pid = current->pid; 1259 runqueue_node->filp = file; 1260 list_add_tail(&runqueue_node->list, &g2d->runqueue); 1261 if (!g2d->runqueue_node) 1262 g2d_exec_runqueue(g2d); 1263 mutex_unlock(&g2d->runqueue_mutex); 1264 1265 if (runqueue_node->async) 1266 goto out; 1267 1268 wait_for_completion(&runqueue_node->complete); 1269 g2d_free_runqueue_node(g2d, runqueue_node); 1270 1271 out: 1272 return 0; 1273 } 1274 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl); 1275 1276 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 1277 { 1278 struct g2d_data *g2d; 1279 int ret; 1280 1281 g2d = dev_get_drvdata(dev); 1282 if (!g2d) 1283 return -EFAULT; 1284 1285 /* allocate dma-aware cmdlist buffer. */ 1286 ret = g2d_init_cmdlist(g2d); 1287 if (ret < 0) { 1288 dev_err(dev, "cmdlist init failed\n"); 1289 return ret; 1290 } 1291 1292 if (!is_drm_iommu_supported(drm_dev)) 1293 return 0; 1294 1295 ret = drm_iommu_attach_device(drm_dev, dev); 1296 if (ret < 0) { 1297 dev_err(dev, "failed to enable iommu.\n"); 1298 g2d_fini_cmdlist(g2d); 1299 } 1300 1301 return ret; 1302 1303 } 1304 1305 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev) 1306 { 1307 if (!is_drm_iommu_supported(drm_dev)) 1308 return; 1309 1310 drm_iommu_detach_device(drm_dev, dev); 1311 } 1312 1313 static int g2d_open(struct drm_device *drm_dev, struct device *dev, 1314 struct drm_file *file) 1315 { 1316 struct drm_exynos_file_private *file_priv = file->driver_priv; 1317 struct exynos_drm_g2d_private *g2d_priv; 1318 1319 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL); 1320 if (!g2d_priv) { 1321 dev_err(dev, "failed to allocate g2d private data\n"); 1322 return -ENOMEM; 1323 } 1324 1325 g2d_priv->dev = dev; 1326 file_priv->g2d_priv = g2d_priv; 1327 1328 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist); 1329 INIT_LIST_HEAD(&g2d_priv->event_list); 1330 INIT_LIST_HEAD(&g2d_priv->userptr_list); 1331 1332 return 0; 1333 } 1334 1335 static void g2d_close(struct drm_device *drm_dev, struct device *dev, 1336 struct drm_file *file) 1337 { 1338 struct drm_exynos_file_private *file_priv = file->driver_priv; 1339 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1340 struct g2d_data *g2d; 1341 struct g2d_cmdlist_node *node, *n; 1342 1343 if (!dev) 1344 return; 1345 1346 g2d = dev_get_drvdata(dev); 1347 if (!g2d) 1348 return; 1349 1350 mutex_lock(&g2d->cmdlist_mutex); 1351 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) { 1352 /* 1353 * unmap all gem objects not completed. 1354 * 1355 * P.S. if current process was terminated forcely then 1356 * there may be some commands in inuse_cmdlist so unmap 1357 * them. 1358 */ 1359 g2d_unmap_cmdlist_gem(g2d, node, file); 1360 list_move_tail(&node->list, &g2d->free_cmdlist); 1361 } 1362 mutex_unlock(&g2d->cmdlist_mutex); 1363 1364 /* release all g2d_userptr in pool. */ 1365 g2d_userptr_free_all(drm_dev, g2d, file); 1366 1367 kfree(file_priv->g2d_priv); 1368 } 1369 1370 static int g2d_probe(struct platform_device *pdev) 1371 { 1372 struct device *dev = &pdev->dev; 1373 struct resource *res; 1374 struct g2d_data *g2d; 1375 struct exynos_drm_subdrv *subdrv; 1376 int ret; 1377 1378 g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL); 1379 if (!g2d) { 1380 dev_err(dev, "failed to allocate driver data\n"); 1381 return -ENOMEM; 1382 } 1383 1384 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab", 1385 sizeof(struct g2d_runqueue_node), 0, 0, NULL); 1386 if (!g2d->runqueue_slab) 1387 return -ENOMEM; 1388 1389 g2d->dev = dev; 1390 1391 g2d->g2d_workq = create_singlethread_workqueue("g2d"); 1392 if (!g2d->g2d_workq) { 1393 dev_err(dev, "failed to create workqueue\n"); 1394 ret = -EINVAL; 1395 goto err_destroy_slab; 1396 } 1397 1398 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker); 1399 INIT_LIST_HEAD(&g2d->free_cmdlist); 1400 INIT_LIST_HEAD(&g2d->runqueue); 1401 1402 mutex_init(&g2d->cmdlist_mutex); 1403 mutex_init(&g2d->runqueue_mutex); 1404 1405 g2d->gate_clk = devm_clk_get(dev, "fimg2d"); 1406 if (IS_ERR(g2d->gate_clk)) { 1407 dev_err(dev, "failed to get gate clock\n"); 1408 ret = PTR_ERR(g2d->gate_clk); 1409 goto err_destroy_workqueue; 1410 } 1411 1412 pm_runtime_enable(dev); 1413 1414 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1415 1416 g2d->regs = devm_ioremap_resource(dev, res); 1417 if (IS_ERR(g2d->regs)) { 1418 ret = PTR_ERR(g2d->regs); 1419 goto err_put_clk; 1420 } 1421 1422 g2d->irq = platform_get_irq(pdev, 0); 1423 if (g2d->irq < 0) { 1424 dev_err(dev, "failed to get irq\n"); 1425 ret = g2d->irq; 1426 goto err_put_clk; 1427 } 1428 1429 ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0, 1430 "drm_g2d", g2d); 1431 if (ret < 0) { 1432 dev_err(dev, "irq request failed\n"); 1433 goto err_put_clk; 1434 } 1435 1436 g2d->max_pool = MAX_POOL; 1437 1438 platform_set_drvdata(pdev, g2d); 1439 1440 subdrv = &g2d->subdrv; 1441 subdrv->dev = dev; 1442 subdrv->probe = g2d_subdrv_probe; 1443 subdrv->remove = g2d_subdrv_remove; 1444 subdrv->open = g2d_open; 1445 subdrv->close = g2d_close; 1446 1447 ret = exynos_drm_subdrv_register(subdrv); 1448 if (ret < 0) { 1449 dev_err(dev, "failed to register drm g2d device\n"); 1450 goto err_put_clk; 1451 } 1452 1453 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n", 1454 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); 1455 1456 return 0; 1457 1458 err_put_clk: 1459 pm_runtime_disable(dev); 1460 err_destroy_workqueue: 1461 destroy_workqueue(g2d->g2d_workq); 1462 err_destroy_slab: 1463 kmem_cache_destroy(g2d->runqueue_slab); 1464 return ret; 1465 } 1466 1467 static int g2d_remove(struct platform_device *pdev) 1468 { 1469 struct g2d_data *g2d = platform_get_drvdata(pdev); 1470 1471 cancel_work_sync(&g2d->runqueue_work); 1472 exynos_drm_subdrv_unregister(&g2d->subdrv); 1473 1474 while (g2d->runqueue_node) { 1475 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 1476 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 1477 } 1478 1479 pm_runtime_disable(&pdev->dev); 1480 1481 g2d_fini_cmdlist(g2d); 1482 destroy_workqueue(g2d->g2d_workq); 1483 kmem_cache_destroy(g2d->runqueue_slab); 1484 1485 return 0; 1486 } 1487 1488 #ifdef CONFIG_PM_SLEEP 1489 static int g2d_suspend(struct device *dev) 1490 { 1491 struct g2d_data *g2d = dev_get_drvdata(dev); 1492 1493 mutex_lock(&g2d->runqueue_mutex); 1494 g2d->suspended = true; 1495 mutex_unlock(&g2d->runqueue_mutex); 1496 1497 while (g2d->runqueue_node) 1498 /* FIXME: good range? */ 1499 usleep_range(500, 1000); 1500 1501 flush_work(&g2d->runqueue_work); 1502 1503 return 0; 1504 } 1505 1506 static int g2d_resume(struct device *dev) 1507 { 1508 struct g2d_data *g2d = dev_get_drvdata(dev); 1509 1510 g2d->suspended = false; 1511 g2d_exec_runqueue(g2d); 1512 1513 return 0; 1514 } 1515 #endif 1516 1517 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume); 1518 1519 #ifdef CONFIG_OF 1520 static const struct of_device_id exynos_g2d_match[] = { 1521 { .compatible = "samsung,exynos5250-g2d" }, 1522 {}, 1523 }; 1524 MODULE_DEVICE_TABLE(of, exynos_g2d_match); 1525 #endif 1526 1527 struct platform_driver g2d_driver = { 1528 .probe = g2d_probe, 1529 .remove = g2d_remove, 1530 .driver = { 1531 .name = "s5p-g2d", 1532 .owner = THIS_MODULE, 1533 .pm = &g2d_pm_ops, 1534 .of_match_table = of_match_ptr(exynos_g2d_match), 1535 }, 1536 }; 1537