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 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 ret = -ENOMEM; 504 goto err_free_userptr; 505 } 506 507 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset, 508 size, GFP_KERNEL); 509 if (ret < 0) { 510 DRM_ERROR("failed to get sgt from pages.\n"); 511 goto err_free_sgt; 512 } 513 514 g2d_userptr->sgt = sgt; 515 516 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt, 517 DMA_BIDIRECTIONAL); 518 if (ret < 0) { 519 DRM_ERROR("failed to map sgt with dma region.\n"); 520 goto err_sg_free_table; 521 } 522 523 g2d_userptr->dma_addr = sgt->sgl[0].dma_address; 524 g2d_userptr->userptr = userptr; 525 526 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list); 527 528 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) { 529 g2d->current_pool += npages << PAGE_SHIFT; 530 g2d_userptr->in_pool = true; 531 } 532 533 *obj = (unsigned long)g2d_userptr; 534 535 return &g2d_userptr->dma_addr; 536 537 err_sg_free_table: 538 sg_free_table(sgt); 539 540 err_free_sgt: 541 kfree(sgt); 542 543 err_free_userptr: 544 exynos_gem_put_pages_to_userptr(g2d_userptr->pages, 545 g2d_userptr->npages, 546 g2d_userptr->vma); 547 548 err_put_vma: 549 exynos_gem_put_vma(g2d_userptr->vma); 550 551 err_free_pages: 552 drm_free_large(pages); 553 554 err_free: 555 kfree(g2d_userptr); 556 557 return ERR_PTR(ret); 558 } 559 560 static void g2d_userptr_free_all(struct drm_device *drm_dev, 561 struct g2d_data *g2d, 562 struct drm_file *filp) 563 { 564 struct drm_exynos_file_private *file_priv = filp->driver_priv; 565 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 566 struct g2d_cmdlist_userptr *g2d_userptr, *n; 567 568 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list) 569 if (g2d_userptr->in_pool) 570 g2d_userptr_put_dma_addr(drm_dev, 571 (unsigned long)g2d_userptr, 572 true); 573 574 g2d->current_pool = 0; 575 } 576 577 static enum g2d_reg_type g2d_get_reg_type(int reg_offset) 578 { 579 enum g2d_reg_type reg_type; 580 581 switch (reg_offset) { 582 case G2D_SRC_BASE_ADDR: 583 case G2D_SRC_COLOR_MODE: 584 case G2D_SRC_LEFT_TOP: 585 case G2D_SRC_RIGHT_BOTTOM: 586 reg_type = REG_TYPE_SRC; 587 break; 588 case G2D_SRC_PLANE2_BASE_ADDR: 589 reg_type = REG_TYPE_SRC_PLANE2; 590 break; 591 case G2D_DST_BASE_ADDR: 592 case G2D_DST_COLOR_MODE: 593 case G2D_DST_LEFT_TOP: 594 case G2D_DST_RIGHT_BOTTOM: 595 reg_type = REG_TYPE_DST; 596 break; 597 case G2D_DST_PLANE2_BASE_ADDR: 598 reg_type = REG_TYPE_DST_PLANE2; 599 break; 600 case G2D_PAT_BASE_ADDR: 601 reg_type = REG_TYPE_PAT; 602 break; 603 case G2D_MSK_BASE_ADDR: 604 reg_type = REG_TYPE_MSK; 605 break; 606 default: 607 reg_type = REG_TYPE_NONE; 608 DRM_ERROR("Unknown register offset![%d]\n", reg_offset); 609 break; 610 } 611 612 return reg_type; 613 } 614 615 static unsigned long g2d_get_buf_bpp(unsigned int format) 616 { 617 unsigned long bpp; 618 619 switch (format) { 620 case G2D_FMT_XRGB8888: 621 case G2D_FMT_ARGB8888: 622 bpp = 4; 623 break; 624 case G2D_FMT_RGB565: 625 case G2D_FMT_XRGB1555: 626 case G2D_FMT_ARGB1555: 627 case G2D_FMT_XRGB4444: 628 case G2D_FMT_ARGB4444: 629 bpp = 2; 630 break; 631 case G2D_FMT_PACKED_RGB888: 632 bpp = 3; 633 break; 634 default: 635 bpp = 1; 636 break; 637 } 638 639 return bpp; 640 } 641 642 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc, 643 enum g2d_reg_type reg_type, 644 unsigned long size) 645 { 646 unsigned int width, height; 647 unsigned long area; 648 649 /* 650 * check source and destination buffers only. 651 * so the others are always valid. 652 */ 653 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST) 654 return true; 655 656 width = buf_desc->right_x - buf_desc->left_x; 657 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) { 658 DRM_ERROR("width[%u] is out of range!\n", width); 659 return false; 660 } 661 662 height = buf_desc->bottom_y - buf_desc->top_y; 663 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) { 664 DRM_ERROR("height[%u] is out of range!\n", height); 665 return false; 666 } 667 668 area = (unsigned long)width * (unsigned long)height * 669 g2d_get_buf_bpp(buf_desc->format); 670 if (area > size) { 671 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size); 672 return false; 673 } 674 675 return true; 676 } 677 678 static int g2d_map_cmdlist_gem(struct g2d_data *g2d, 679 struct g2d_cmdlist_node *node, 680 struct drm_device *drm_dev, 681 struct drm_file *file) 682 { 683 struct g2d_cmdlist *cmdlist = node->cmdlist; 684 struct g2d_buf_info *buf_info = &node->buf_info; 685 int offset; 686 int ret; 687 int i; 688 689 for (i = 0; i < buf_info->map_nr; i++) { 690 struct g2d_buf_desc *buf_desc; 691 enum g2d_reg_type reg_type; 692 int reg_pos; 693 unsigned long handle; 694 dma_addr_t *addr; 695 696 reg_pos = cmdlist->last - 2 * (i + 1); 697 698 offset = cmdlist->data[reg_pos]; 699 handle = cmdlist->data[reg_pos + 1]; 700 701 reg_type = g2d_get_reg_type(offset); 702 if (reg_type == REG_TYPE_NONE) { 703 ret = -EFAULT; 704 goto err; 705 } 706 707 buf_desc = &buf_info->descs[reg_type]; 708 709 if (buf_info->types[reg_type] == BUF_TYPE_GEM) { 710 unsigned long size; 711 712 size = exynos_drm_gem_get_size(drm_dev, handle, file); 713 if (!size) { 714 ret = -EFAULT; 715 goto err; 716 } 717 718 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 719 size)) { 720 ret = -EFAULT; 721 goto err; 722 } 723 724 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle, 725 file); 726 if (IS_ERR(addr)) { 727 ret = -EFAULT; 728 goto err; 729 } 730 } else { 731 struct drm_exynos_g2d_userptr g2d_userptr; 732 733 if (copy_from_user(&g2d_userptr, (void __user *)handle, 734 sizeof(struct drm_exynos_g2d_userptr))) { 735 ret = -EFAULT; 736 goto err; 737 } 738 739 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type, 740 g2d_userptr.size)) { 741 ret = -EFAULT; 742 goto err; 743 } 744 745 addr = g2d_userptr_get_dma_addr(drm_dev, 746 g2d_userptr.userptr, 747 g2d_userptr.size, 748 file, 749 &handle); 750 if (IS_ERR(addr)) { 751 ret = -EFAULT; 752 goto err; 753 } 754 } 755 756 cmdlist->data[reg_pos + 1] = *addr; 757 buf_info->reg_types[i] = reg_type; 758 buf_info->handles[reg_type] = handle; 759 } 760 761 return 0; 762 763 err: 764 buf_info->map_nr = i; 765 return ret; 766 } 767 768 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d, 769 struct g2d_cmdlist_node *node, 770 struct drm_file *filp) 771 { 772 struct exynos_drm_subdrv *subdrv = &g2d->subdrv; 773 struct g2d_buf_info *buf_info = &node->buf_info; 774 int i; 775 776 for (i = 0; i < buf_info->map_nr; i++) { 777 struct g2d_buf_desc *buf_desc; 778 enum g2d_reg_type reg_type; 779 unsigned long handle; 780 781 reg_type = buf_info->reg_types[i]; 782 783 buf_desc = &buf_info->descs[reg_type]; 784 handle = buf_info->handles[reg_type]; 785 786 if (buf_info->types[reg_type] == BUF_TYPE_GEM) 787 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle, 788 filp); 789 else 790 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle, 791 false); 792 793 buf_info->reg_types[i] = REG_TYPE_NONE; 794 buf_info->handles[reg_type] = 0; 795 buf_info->types[reg_type] = 0; 796 memset(buf_desc, 0x00, sizeof(*buf_desc)); 797 } 798 799 buf_info->map_nr = 0; 800 } 801 802 static void g2d_dma_start(struct g2d_data *g2d, 803 struct g2d_runqueue_node *runqueue_node) 804 { 805 struct g2d_cmdlist_node *node = 806 list_first_entry(&runqueue_node->run_cmdlist, 807 struct g2d_cmdlist_node, list); 808 int ret; 809 810 ret = pm_runtime_get_sync(g2d->dev); 811 if (ret < 0) 812 return; 813 814 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR); 815 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND); 816 } 817 818 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d) 819 { 820 struct g2d_runqueue_node *runqueue_node; 821 822 if (list_empty(&g2d->runqueue)) 823 return NULL; 824 825 runqueue_node = list_first_entry(&g2d->runqueue, 826 struct g2d_runqueue_node, list); 827 list_del_init(&runqueue_node->list); 828 return runqueue_node; 829 } 830 831 static void g2d_free_runqueue_node(struct g2d_data *g2d, 832 struct g2d_runqueue_node *runqueue_node) 833 { 834 struct g2d_cmdlist_node *node; 835 836 if (!runqueue_node) 837 return; 838 839 mutex_lock(&g2d->cmdlist_mutex); 840 /* 841 * commands in run_cmdlist have been completed so unmap all gem 842 * objects in each command node so that they are unreferenced. 843 */ 844 list_for_each_entry(node, &runqueue_node->run_cmdlist, list) 845 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp); 846 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist); 847 mutex_unlock(&g2d->cmdlist_mutex); 848 849 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 850 } 851 852 static void g2d_exec_runqueue(struct g2d_data *g2d) 853 { 854 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 855 if (g2d->runqueue_node) 856 g2d_dma_start(g2d, g2d->runqueue_node); 857 } 858 859 static void g2d_runqueue_worker(struct work_struct *work) 860 { 861 struct g2d_data *g2d = container_of(work, struct g2d_data, 862 runqueue_work); 863 864 mutex_lock(&g2d->runqueue_mutex); 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 spin_lock_irqsave(&drm_dev->event_lock, flags); 1090 file->event_space += sizeof(e->event); 1091 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1092 1093 ret = -ENOMEM; 1094 goto err; 1095 } 1096 1097 e->event.base.type = DRM_EXYNOS_G2D_EVENT; 1098 e->event.base.length = sizeof(e->event); 1099 e->event.user_data = req->user_data; 1100 e->base.event = &e->event.base; 1101 e->base.file_priv = file; 1102 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree; 1103 1104 node->event = e; 1105 } 1106 1107 cmdlist = node->cmdlist; 1108 1109 cmdlist->last = 0; 1110 1111 /* 1112 * If don't clear SFR registers, the cmdlist is affected by register 1113 * values of previous cmdlist. G2D hw executes SFR clear command and 1114 * a next command at the same time then the next command is ignored and 1115 * is executed rightly from next next command, so needs a dummy command 1116 * to next command of SFR clear command. 1117 */ 1118 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET; 1119 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR; 1120 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR; 1121 cmdlist->data[cmdlist->last++] = 0; 1122 1123 /* 1124 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG 1125 * and GCF bit should be set to INTEN register if user wants 1126 * G2D interrupt event once current command list execution is 1127 * finished. 1128 * Otherwise only ACF bit should be set to INTEN register so 1129 * that one interrupt is occurred after all command lists 1130 * have been completed. 1131 */ 1132 if (node->event) { 1133 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1134 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF; 1135 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD; 1136 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD; 1137 } else { 1138 cmdlist->data[cmdlist->last++] = G2D_INTEN; 1139 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF; 1140 } 1141 1142 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */ 1143 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2; 1144 if (size > G2D_CMDLIST_DATA_NUM) { 1145 dev_err(dev, "cmdlist size is too big\n"); 1146 ret = -EINVAL; 1147 goto err_free_event; 1148 } 1149 1150 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd; 1151 1152 if (copy_from_user(cmdlist->data + cmdlist->last, 1153 (void __user *)cmd, 1154 sizeof(*cmd) * req->cmd_nr)) { 1155 ret = -EFAULT; 1156 goto err_free_event; 1157 } 1158 cmdlist->last += req->cmd_nr * 2; 1159 1160 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false); 1161 if (ret < 0) 1162 goto err_free_event; 1163 1164 node->buf_info.map_nr = req->cmd_buf_nr; 1165 if (req->cmd_buf_nr) { 1166 struct drm_exynos_g2d_cmd *cmd_buf; 1167 1168 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf; 1169 1170 if (copy_from_user(cmdlist->data + cmdlist->last, 1171 (void __user *)cmd_buf, 1172 sizeof(*cmd_buf) * req->cmd_buf_nr)) { 1173 ret = -EFAULT; 1174 goto err_free_event; 1175 } 1176 cmdlist->last += req->cmd_buf_nr * 2; 1177 1178 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true); 1179 if (ret < 0) 1180 goto err_free_event; 1181 1182 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file); 1183 if (ret < 0) 1184 goto err_unmap; 1185 } 1186 1187 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START; 1188 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT; 1189 1190 /* head */ 1191 cmdlist->head = cmdlist->last / 2; 1192 1193 /* tail */ 1194 cmdlist->data[cmdlist->last] = 0; 1195 1196 g2d_add_cmdlist_to_inuse(g2d_priv, node); 1197 1198 return 0; 1199 1200 err_unmap: 1201 g2d_unmap_cmdlist_gem(g2d, node, file); 1202 err_free_event: 1203 if (node->event) { 1204 spin_lock_irqsave(&drm_dev->event_lock, flags); 1205 file->event_space += sizeof(e->event); 1206 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 1207 kfree(node->event); 1208 } 1209 err: 1210 g2d_put_cmdlist(g2d, node); 1211 return ret; 1212 } 1213 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl); 1214 1215 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, 1216 struct drm_file *file) 1217 { 1218 struct drm_exynos_file_private *file_priv = file->driver_priv; 1219 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1220 struct device *dev = g2d_priv->dev; 1221 struct g2d_data *g2d; 1222 struct drm_exynos_g2d_exec *req = data; 1223 struct g2d_runqueue_node *runqueue_node; 1224 struct list_head *run_cmdlist; 1225 struct list_head *event_list; 1226 1227 if (!dev) 1228 return -ENODEV; 1229 1230 g2d = dev_get_drvdata(dev); 1231 if (!g2d) 1232 return -EFAULT; 1233 1234 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL); 1235 if (!runqueue_node) { 1236 dev_err(dev, "failed to allocate memory\n"); 1237 return -ENOMEM; 1238 } 1239 run_cmdlist = &runqueue_node->run_cmdlist; 1240 event_list = &runqueue_node->event_list; 1241 INIT_LIST_HEAD(run_cmdlist); 1242 INIT_LIST_HEAD(event_list); 1243 init_completion(&runqueue_node->complete); 1244 runqueue_node->async = req->async; 1245 1246 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist); 1247 list_splice_init(&g2d_priv->event_list, event_list); 1248 1249 if (list_empty(run_cmdlist)) { 1250 dev_err(dev, "there is no inuse cmdlist\n"); 1251 kmem_cache_free(g2d->runqueue_slab, runqueue_node); 1252 return -EPERM; 1253 } 1254 1255 mutex_lock(&g2d->runqueue_mutex); 1256 runqueue_node->pid = current->pid; 1257 runqueue_node->filp = file; 1258 list_add_tail(&runqueue_node->list, &g2d->runqueue); 1259 if (!g2d->runqueue_node) 1260 g2d_exec_runqueue(g2d); 1261 mutex_unlock(&g2d->runqueue_mutex); 1262 1263 if (runqueue_node->async) 1264 goto out; 1265 1266 wait_for_completion(&runqueue_node->complete); 1267 g2d_free_runqueue_node(g2d, runqueue_node); 1268 1269 out: 1270 return 0; 1271 } 1272 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl); 1273 1274 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 1275 { 1276 struct g2d_data *g2d; 1277 int ret; 1278 1279 g2d = dev_get_drvdata(dev); 1280 if (!g2d) 1281 return -EFAULT; 1282 1283 /* allocate dma-aware cmdlist buffer. */ 1284 ret = g2d_init_cmdlist(g2d); 1285 if (ret < 0) { 1286 dev_err(dev, "cmdlist init failed\n"); 1287 return ret; 1288 } 1289 1290 if (!is_drm_iommu_supported(drm_dev)) 1291 return 0; 1292 1293 ret = drm_iommu_attach_device(drm_dev, dev); 1294 if (ret < 0) { 1295 dev_err(dev, "failed to enable iommu.\n"); 1296 g2d_fini_cmdlist(g2d); 1297 } 1298 1299 return ret; 1300 1301 } 1302 1303 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev) 1304 { 1305 if (!is_drm_iommu_supported(drm_dev)) 1306 return; 1307 1308 drm_iommu_detach_device(drm_dev, dev); 1309 } 1310 1311 static int g2d_open(struct drm_device *drm_dev, struct device *dev, 1312 struct drm_file *file) 1313 { 1314 struct drm_exynos_file_private *file_priv = file->driver_priv; 1315 struct exynos_drm_g2d_private *g2d_priv; 1316 1317 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL); 1318 if (!g2d_priv) 1319 return -ENOMEM; 1320 1321 g2d_priv->dev = dev; 1322 file_priv->g2d_priv = g2d_priv; 1323 1324 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist); 1325 INIT_LIST_HEAD(&g2d_priv->event_list); 1326 INIT_LIST_HEAD(&g2d_priv->userptr_list); 1327 1328 return 0; 1329 } 1330 1331 static void g2d_close(struct drm_device *drm_dev, struct device *dev, 1332 struct drm_file *file) 1333 { 1334 struct drm_exynos_file_private *file_priv = file->driver_priv; 1335 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; 1336 struct g2d_data *g2d; 1337 struct g2d_cmdlist_node *node, *n; 1338 1339 if (!dev) 1340 return; 1341 1342 g2d = dev_get_drvdata(dev); 1343 if (!g2d) 1344 return; 1345 1346 mutex_lock(&g2d->cmdlist_mutex); 1347 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) { 1348 /* 1349 * unmap all gem objects not completed. 1350 * 1351 * P.S. if current process was terminated forcely then 1352 * there may be some commands in inuse_cmdlist so unmap 1353 * them. 1354 */ 1355 g2d_unmap_cmdlist_gem(g2d, node, file); 1356 list_move_tail(&node->list, &g2d->free_cmdlist); 1357 } 1358 mutex_unlock(&g2d->cmdlist_mutex); 1359 1360 /* release all g2d_userptr in pool. */ 1361 g2d_userptr_free_all(drm_dev, g2d, file); 1362 1363 kfree(file_priv->g2d_priv); 1364 } 1365 1366 static int g2d_probe(struct platform_device *pdev) 1367 { 1368 struct device *dev = &pdev->dev; 1369 struct resource *res; 1370 struct g2d_data *g2d; 1371 struct exynos_drm_subdrv *subdrv; 1372 int ret; 1373 1374 g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL); 1375 if (!g2d) 1376 return -ENOMEM; 1377 1378 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab", 1379 sizeof(struct g2d_runqueue_node), 0, 0, NULL); 1380 if (!g2d->runqueue_slab) 1381 return -ENOMEM; 1382 1383 g2d->dev = dev; 1384 1385 g2d->g2d_workq = create_singlethread_workqueue("g2d"); 1386 if (!g2d->g2d_workq) { 1387 dev_err(dev, "failed to create workqueue\n"); 1388 ret = -EINVAL; 1389 goto err_destroy_slab; 1390 } 1391 1392 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker); 1393 INIT_LIST_HEAD(&g2d->free_cmdlist); 1394 INIT_LIST_HEAD(&g2d->runqueue); 1395 1396 mutex_init(&g2d->cmdlist_mutex); 1397 mutex_init(&g2d->runqueue_mutex); 1398 1399 g2d->gate_clk = devm_clk_get(dev, "fimg2d"); 1400 if (IS_ERR(g2d->gate_clk)) { 1401 dev_err(dev, "failed to get gate clock\n"); 1402 ret = PTR_ERR(g2d->gate_clk); 1403 goto err_destroy_workqueue; 1404 } 1405 1406 pm_runtime_enable(dev); 1407 1408 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1409 1410 g2d->regs = devm_ioremap_resource(dev, res); 1411 if (IS_ERR(g2d->regs)) { 1412 ret = PTR_ERR(g2d->regs); 1413 goto err_put_clk; 1414 } 1415 1416 g2d->irq = platform_get_irq(pdev, 0); 1417 if (g2d->irq < 0) { 1418 dev_err(dev, "failed to get irq\n"); 1419 ret = g2d->irq; 1420 goto err_put_clk; 1421 } 1422 1423 ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0, 1424 "drm_g2d", g2d); 1425 if (ret < 0) { 1426 dev_err(dev, "irq request failed\n"); 1427 goto err_put_clk; 1428 } 1429 1430 g2d->max_pool = MAX_POOL; 1431 1432 platform_set_drvdata(pdev, g2d); 1433 1434 subdrv = &g2d->subdrv; 1435 subdrv->dev = dev; 1436 subdrv->probe = g2d_subdrv_probe; 1437 subdrv->remove = g2d_subdrv_remove; 1438 subdrv->open = g2d_open; 1439 subdrv->close = g2d_close; 1440 1441 ret = exynos_drm_subdrv_register(subdrv); 1442 if (ret < 0) { 1443 dev_err(dev, "failed to register drm g2d device\n"); 1444 goto err_put_clk; 1445 } 1446 1447 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n", 1448 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER); 1449 1450 return 0; 1451 1452 err_put_clk: 1453 pm_runtime_disable(dev); 1454 err_destroy_workqueue: 1455 destroy_workqueue(g2d->g2d_workq); 1456 err_destroy_slab: 1457 kmem_cache_destroy(g2d->runqueue_slab); 1458 return ret; 1459 } 1460 1461 static int g2d_remove(struct platform_device *pdev) 1462 { 1463 struct g2d_data *g2d = platform_get_drvdata(pdev); 1464 1465 cancel_work_sync(&g2d->runqueue_work); 1466 exynos_drm_subdrv_unregister(&g2d->subdrv); 1467 1468 while (g2d->runqueue_node) { 1469 g2d_free_runqueue_node(g2d, g2d->runqueue_node); 1470 g2d->runqueue_node = g2d_get_runqueue_node(g2d); 1471 } 1472 1473 pm_runtime_disable(&pdev->dev); 1474 1475 g2d_fini_cmdlist(g2d); 1476 destroy_workqueue(g2d->g2d_workq); 1477 kmem_cache_destroy(g2d->runqueue_slab); 1478 1479 return 0; 1480 } 1481 1482 #ifdef CONFIG_PM_SLEEP 1483 static int g2d_suspend(struct device *dev) 1484 { 1485 struct g2d_data *g2d = dev_get_drvdata(dev); 1486 1487 mutex_lock(&g2d->runqueue_mutex); 1488 g2d->suspended = true; 1489 mutex_unlock(&g2d->runqueue_mutex); 1490 1491 while (g2d->runqueue_node) 1492 /* FIXME: good range? */ 1493 usleep_range(500, 1000); 1494 1495 flush_work(&g2d->runqueue_work); 1496 1497 return 0; 1498 } 1499 1500 static int g2d_resume(struct device *dev) 1501 { 1502 struct g2d_data *g2d = dev_get_drvdata(dev); 1503 1504 g2d->suspended = false; 1505 g2d_exec_runqueue(g2d); 1506 1507 return 0; 1508 } 1509 #endif 1510 1511 #ifdef CONFIG_PM_RUNTIME 1512 static int g2d_runtime_suspend(struct device *dev) 1513 { 1514 struct g2d_data *g2d = dev_get_drvdata(dev); 1515 1516 clk_disable_unprepare(g2d->gate_clk); 1517 1518 return 0; 1519 } 1520 1521 static int g2d_runtime_resume(struct device *dev) 1522 { 1523 struct g2d_data *g2d = dev_get_drvdata(dev); 1524 int ret; 1525 1526 ret = clk_prepare_enable(g2d->gate_clk); 1527 if (ret < 0) 1528 dev_warn(dev, "failed to enable clock.\n"); 1529 1530 return ret; 1531 } 1532 #endif 1533 1534 static const struct dev_pm_ops g2d_pm_ops = { 1535 SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume) 1536 SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL) 1537 }; 1538 1539 static const struct of_device_id exynos_g2d_match[] = { 1540 { .compatible = "samsung,exynos5250-g2d" }, 1541 {}, 1542 }; 1543 1544 struct platform_driver g2d_driver = { 1545 .probe = g2d_probe, 1546 .remove = g2d_remove, 1547 .driver = { 1548 .name = "s5p-g2d", 1549 .owner = THIS_MODULE, 1550 .pm = &g2d_pm_ops, 1551 .of_match_table = exynos_g2d_match, 1552 }, 1553 }; 1554