drivers/gpu/drm/exynos/exynos_drm_g2d.c

   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_gem.h"
  27 #include "exynos_drm_iommu.h"
  28
  29 #define G2D_HW_MAJOR_VER                4
  30 #define G2D_HW_MINOR_VER                1
  31
  32 /* vaild register range set from user: 0x0104 ~ 0x0880 */
  33 #define G2D_VALID_START                 0x0104
  34 #define G2D_VALID_END                   0x0880
  35
  36 /* general registers */
  37 #define G2D_SOFT_RESET                  0x0000
  38 #define G2D_INTEN                       0x0004
  39 #define G2D_INTC_PEND                   0x000C
  40 #define G2D_DMA_SFR_BASE_ADDR           0x0080
  41 #define G2D_DMA_COMMAND                 0x0084
  42 #define G2D_DMA_STATUS                  0x008C
  43 #define G2D_DMA_HOLD_CMD                0x0090
  44
  45 /* command registers */
  46 #define G2D_BITBLT_START                0x0100
  47
  48 /* registers for base address */
  49 #define G2D_SRC_BASE_ADDR               0x0304
  50 #define G2D_SRC_COLOR_MODE              0x030C
  51 #define G2D_SRC_LEFT_TOP                0x0310
  52 #define G2D_SRC_RIGHT_BOTTOM            0x0314
  53 #define G2D_SRC_PLANE2_BASE_ADDR        0x0318
  54 #define G2D_DST_BASE_ADDR               0x0404
  55 #define G2D_DST_COLOR_MODE              0x040C
  56 #define G2D_DST_LEFT_TOP                0x0410
  57 #define G2D_DST_RIGHT_BOTTOM            0x0414
  58 #define G2D_DST_PLANE2_BASE_ADDR        0x0418
  59 #define G2D_PAT_BASE_ADDR               0x0500
  60 #define G2D_MSK_BASE_ADDR               0x0520
  61
  62 /* G2D_SOFT_RESET */
  63 #define G2D_SFRCLEAR                    (1 << 1)
  64 #define G2D_R                           (1 << 0)
  65
  66 /* G2D_INTEN */
  67 #define G2D_INTEN_ACF                   (1 << 3)
  68 #define G2D_INTEN_UCF                   (1 << 2)
  69 #define G2D_INTEN_GCF                   (1 << 1)
  70 #define G2D_INTEN_SCF                   (1 << 0)
  71
  72 /* G2D_INTC_PEND */
  73 #define G2D_INTP_ACMD_FIN               (1 << 3)
  74 #define G2D_INTP_UCMD_FIN               (1 << 2)
  75 #define G2D_INTP_GCMD_FIN               (1 << 1)
  76 #define G2D_INTP_SCMD_FIN               (1 << 0)
  77
  78 /* G2D_DMA_COMMAND */
  79 #define G2D_DMA_HALT                    (1 << 2)
  80 #define G2D_DMA_CONTINUE                (1 << 1)
  81 #define G2D_DMA_START                   (1 << 0)
  82
  83 /* G2D_DMA_STATUS */
  84 #define G2D_DMA_LIST_DONE_COUNT         (0xFF << 17)
  85 #define G2D_DMA_BITBLT_DONE_COUNT       (0xFFFF << 1)
  86 #define G2D_DMA_DONE                    (1 << 0)
  87 #define G2D_DMA_LIST_DONE_COUNT_OFFSET  17
  88
  89 /* G2D_DMA_HOLD_CMD */
  90 #define G2D_USER_HOLD                   (1 << 2)
  91 #define G2D_LIST_HOLD                   (1 << 1)
  92 #define G2D_BITBLT_HOLD                 (1 << 0)
  93
  94 /* G2D_BITBLT_START */
  95 #define G2D_START_CASESEL               (1 << 2)
  96 #define G2D_START_NHOLT                 (1 << 1)
  97 #define G2D_START_BITBLT                (1 << 0)
  98
  99 /* buffer color format */
 100 #define G2D_FMT_XRGB8888                0
 101 #define G2D_FMT_ARGB8888                1
 102 #define G2D_FMT_RGB565                  2
 103 #define G2D_FMT_XRGB1555                3
 104 #define G2D_FMT_ARGB1555                4
 105 #define G2D_FMT_XRGB4444                5
 106 #define G2D_FMT_ARGB4444                6
 107 #define G2D_FMT_PACKED_RGB888           7
 108 #define G2D_FMT_A8                      11
 109 #define G2D_FMT_L8                      12
 110
 111 /* buffer valid length */
 112 #define G2D_LEN_MIN                     1
 113 #define G2D_LEN_MAX                     8000
 114
 115 #define G2D_CMDLIST_SIZE                (PAGE_SIZE / 4)
 116 #define G2D_CMDLIST_NUM                 64
 117 #define G2D_CMDLIST_POOL_SIZE           (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
 118 #define G2D_CMDLIST_DATA_NUM            (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
 119
 120 /* maximum buffer pool size of userptr is 64MB as default */
 121 #define MAX_POOL                (64 * 1024 * 1024)
 122
 123 enum {
 124         BUF_TYPE_GEM = 1,
 125         BUF_TYPE_USERPTR,
 126 };
 127
 128 enum g2d_reg_type {
 129         REG_TYPE_NONE = -1,
 130         REG_TYPE_SRC,
 131         REG_TYPE_SRC_PLANE2,
 132         REG_TYPE_DST,
 133         REG_TYPE_DST_PLANE2,
 134         REG_TYPE_PAT,
 135         REG_TYPE_MSK,
 136         MAX_REG_TYPE_NR
 137 };
 138
 139 /* cmdlist data structure */
 140 struct g2d_cmdlist {
 141         u32             head;
 142         unsigned long   data[G2D_CMDLIST_DATA_NUM];
 143         u32             last;   /* last data offset */
 144 };
 145
 146 /*
 147  * A structure of buffer description
 148  *
 149  * @format: color format
 150  * @left_x: the x coordinates of left top corner
 151  * @top_y: the y coordinates of left top corner
 152  * @right_x: the x coordinates of right bottom corner
 153  * @bottom_y: the y coordinates of right bottom corner
 154  *
 155  */
 156 struct g2d_buf_desc {
 157         unsigned int    format;
 158         unsigned int    left_x;
 159         unsigned int    top_y;
 160         unsigned int    right_x;
 161         unsigned int    bottom_y;
 162 };
 163
 164 /*
 165  * A structure of buffer information
 166  *
 167  * @map_nr: manages the number of mapped buffers
 168  * @reg_types: stores regitster type in the order of requested command
 169  * @handles: stores buffer handle in its reg_type position
 170  * @types: stores buffer type in its reg_type position
 171  * @descs: stores buffer description in its reg_type position
 172  *
 173  */
 174 struct g2d_buf_info {
 175         unsigned int            map_nr;
 176         enum g2d_reg_type       reg_types[MAX_REG_TYPE_NR];
 177         unsigned long           handles[MAX_REG_TYPE_NR];
 178         unsigned int            types[MAX_REG_TYPE_NR];
 179         struct g2d_buf_desc     descs[MAX_REG_TYPE_NR];
 180 };
 181
 182 struct drm_exynos_pending_g2d_event {
 183         struct drm_pending_event        base;
 184         struct drm_exynos_g2d_event     event;
 185 };
 186
 187 struct g2d_cmdlist_userptr {
 188         struct list_head        list;
 189         dma_addr_t              dma_addr;
 190         unsigned long           userptr;
 191         unsigned long           size;
 192         struct page             **pages;
 193         unsigned int            npages;
 194         struct sg_table         *sgt;
 195         struct vm_area_struct   *vma;
 196         atomic_t                refcount;
 197         bool                    in_pool;
 198         bool                    out_of_list;
 199 };
 200 struct g2d_cmdlist_node {
 201         struct list_head        list;
 202         struct g2d_cmdlist      *cmdlist;
 203         dma_addr_t              dma_addr;
 204         struct g2d_buf_info     buf_info;
 205
 206         struct drm_exynos_pending_g2d_event     *event;
 207 };
 208
 209 struct g2d_runqueue_node {
 210         struct list_head        list;
 211         struct list_head        run_cmdlist;
 212         struct list_head        event_list;
 213         struct drm_file         *filp;
 214         pid_t                   pid;
 215         struct completion       complete;
 216         int                     async;
 217 };
 218
 219 struct g2d_data {
 220         struct device                   *dev;
 221         struct clk                      *gate_clk;
 222         void __iomem                    *regs;
 223         int                             irq;
 224         struct workqueue_struct         *g2d_workq;
 225         struct work_struct              runqueue_work;
 226         struct exynos_drm_subdrv        subdrv;
 227         bool                            suspended;
 228
 229         /* cmdlist */
 230         struct g2d_cmdlist_node         *cmdlist_node;
 231         struct list_head                free_cmdlist;
 232         struct mutex                    cmdlist_mutex;
 233         dma_addr_t                      cmdlist_pool;
 234         void                            *cmdlist_pool_virt;
 235         struct dma_attrs                cmdlist_dma_attrs;
 236
 237         /* runqueue*/
 238         struct g2d_runqueue_node        *runqueue_node;
 239         struct list_head                runqueue;
 240         struct mutex                    runqueue_mutex;
 241         struct kmem_cache               *runqueue_slab;
 242
 243         unsigned long                   current_pool;
 244         unsigned long                   max_pool;
 245 };
 246
 247 static int g2d_init_cmdlist(struct g2d_data *g2d)
 248 {
 249         struct device *dev = g2d->dev;
 250         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
 251         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 252         int nr;
 253         int ret;
 254         struct g2d_buf_info *buf_info;
 255
 256         init_dma_attrs(&g2d->cmdlist_dma_attrs);
 257         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
 258
 259         g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
 260                                                 G2D_CMDLIST_POOL_SIZE,
 261                                                 &g2d->cmdlist_pool, GFP_KERNEL,
 262                                                 &g2d->cmdlist_dma_attrs);
 263         if (!g2d->cmdlist_pool_virt) {
 264                 dev_err(dev, "failed to allocate dma memory\n");
 265                 return -ENOMEM;
 266         }
 267
 268         node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
 269         if (!node) {
 270                 dev_err(dev, "failed to allocate memory\n");
 271                 ret = -ENOMEM;
 272                 goto err;
 273         }
 274
 275         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
 276                 unsigned int i;
 277
 278                 node[nr].cmdlist =
 279                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
 280                 node[nr].dma_addr =
 281                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
 282
 283                 buf_info = &node[nr].buf_info;
 284                 for (i = 0; i < MAX_REG_TYPE_NR; i++)
 285                         buf_info->reg_types[i] = REG_TYPE_NONE;
 286
 287                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
 288         }
 289
 290         return 0;
 291
 292 err:
 293         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 294                         g2d->cmdlist_pool_virt,
 295                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 296         return ret;
 297 }
 298
 299 static void g2d_fini_cmdlist(struct g2d_data *g2d)
 300 {
 301         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 302
 303         kfree(g2d->cmdlist_node);
 304         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 305                         g2d->cmdlist_pool_virt,
 306                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 307 }
 308
 309 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 310 {
 311         struct device *dev = g2d->dev;
 312         struct g2d_cmdlist_node *node;
 313
 314         mutex_lock(&g2d->cmdlist_mutex);
 315         if (list_empty(&g2d->free_cmdlist)) {
 316                 dev_err(dev, "there is no free cmdlist\n");
 317                 mutex_unlock(&g2d->cmdlist_mutex);
 318                 return NULL;
 319         }
 320
 321         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 322                                 list);
 323         list_del_init(&node->list);
 324         mutex_unlock(&g2d->cmdlist_mutex);
 325
 326         return node;
 327 }
 328
 329 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 330 {
 331         mutex_lock(&g2d->cmdlist_mutex);
 332         list_move_tail(&node->list, &g2d->free_cmdlist);
 333         mutex_unlock(&g2d->cmdlist_mutex);
 334 }
 335
 336 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 337                                      struct g2d_cmdlist_node *node)
 338 {
 339         struct g2d_cmdlist_node *lnode;
 340
 341         if (list_empty(&g2d_priv->inuse_cmdlist))
 342                 goto add_to_list;
 343
 344         /* this links to base address of new cmdlist */
 345         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 346                                 struct g2d_cmdlist_node, list);
 347         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 348
 349 add_to_list:
 350         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 351
 352         if (node->event)
 353                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 354 }
 355
 356 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 357                                         unsigned long obj,
 358                                         bool force)
 359 {
 360         struct g2d_cmdlist_userptr *g2d_userptr =
 361                                         (struct g2d_cmdlist_userptr *)obj;
 362
 363         if (!obj)
 364                 return;
 365
 366         if (force)
 367                 goto out;
 368
 369         atomic_dec(&g2d_userptr->refcount);
 370
 371         if (atomic_read(&g2d_userptr->refcount) > 0)
 372                 return;
 373
 374         if (g2d_userptr->in_pool)
 375                 return;
 376
 377 out:
 378         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
 379                                         DMA_BIDIRECTIONAL);
 380
 381         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 382                                         g2d_userptr->npages,
 383                                         g2d_userptr->vma);
 384
 385         if (!g2d_userptr->out_of_list)
 386                 list_del_init(&g2d_userptr->list);
 387
 388         sg_free_table(g2d_userptr->sgt);
 389         kfree(g2d_userptr->sgt);
 390
 391         drm_free_large(g2d_userptr->pages);
 392         kfree(g2d_userptr);
 393 }
 394
 395 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 396                                         unsigned long userptr,
 397                                         unsigned long size,
 398                                         struct drm_file *filp,
 399                                         unsigned long *obj)
 400 {
 401         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 402         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 403         struct g2d_cmdlist_userptr *g2d_userptr;
 404         struct g2d_data *g2d;
 405         struct page **pages;
 406         struct sg_table *sgt;
 407         struct vm_area_struct *vma;
 408         unsigned long start, end;
 409         unsigned int npages, offset;
 410         int ret;
 411
 412         if (!size) {
 413                 DRM_ERROR("invalid userptr size.\n");
 414                 return ERR_PTR(-EINVAL);
 415         }
 416
 417         g2d = dev_get_drvdata(g2d_priv->dev);
 418
 419         /* check if userptr already exists in userptr_list. */
 420         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 421                 if (g2d_userptr->userptr == userptr) {
 422                         /*
 423                          * also check size because there could be same address
 424                          * and different size.
 425                          */
 426                         if (g2d_userptr->size == size) {
 427                                 atomic_inc(&g2d_userptr->refcount);
 428                                 *obj = (unsigned long)g2d_userptr;
 429
 430                                 return &g2d_userptr->dma_addr;
 431                         }
 432
 433                         /*
 434                          * at this moment, maybe g2d dma is accessing this
 435                          * g2d_userptr memory region so just remove this
 436                          * g2d_userptr object from userptr_list not to be
 437                          * referred again and also except it the userptr
 438                          * pool to be released after the dma access completion.
 439                          */
 440                         g2d_userptr->out_of_list = true;
 441                         g2d_userptr->in_pool = false;
 442                         list_del_init(&g2d_userptr->list);
 443
 444                         break;
 445                 }
 446         }
 447
 448         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 449         if (!g2d_userptr) {
 450                 DRM_ERROR("failed to allocate g2d_userptr.\n");
 451                 return ERR_PTR(-ENOMEM);
 452         }
 453
 454         atomic_set(&g2d_userptr->refcount, 1);
 455
 456         start = userptr & PAGE_MASK;
 457         offset = userptr & ~PAGE_MASK;
 458         end = PAGE_ALIGN(userptr + size);
 459         npages = (end - start) >> PAGE_SHIFT;
 460         g2d_userptr->npages = npages;
 461
 462         pages = drm_calloc_large(npages, sizeof(struct page *));
 463         if (!pages) {
 464                 DRM_ERROR("failed to allocate pages.\n");
 465                 ret = -ENOMEM;
 466                 goto err_free;
 467         }
 468
 469         vma = find_vma(current->mm, userptr);
 470         if (!vma) {
 471                 DRM_ERROR("failed to get vm region.\n");
 472                 ret = -EFAULT;
 473                 goto err_free_pages;
 474         }
 475
 476         if (vma->vm_end < userptr + size) {
 477                 DRM_ERROR("vma is too small.\n");
 478                 ret = -EFAULT;
 479                 goto err_free_pages;
 480         }
 481
 482         g2d_userptr->vma = exynos_gem_get_vma(vma);
 483         if (!g2d_userptr->vma) {
 484                 DRM_ERROR("failed to copy vma.\n");
 485                 ret = -ENOMEM;
 486                 goto err_free_pages;
 487         }
 488
 489         g2d_userptr->size = size;
 490
 491         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
 492                                                 npages, pages, vma);
 493         if (ret < 0) {
 494                 DRM_ERROR("failed to get user pages from userptr.\n");
 495                 goto err_put_vma;
 496         }
 497
 498         g2d_userptr->pages = pages;
 499
 500         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 501         if (!sgt) {
 502                 DRM_ERROR("failed to allocate sg table.\n");
 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                 dev_warn(g2d->dev, "failed pm power on.\n");
 813                 return;
 814         }
 815
 816         ret = clk_prepare_enable(g2d->gate_clk);
 817         if (ret < 0) {
 818                 dev_warn(g2d->dev, "failed to enable clock.\n");
 819                 pm_runtime_put_sync(g2d->dev);
 820                 return;
 821         }
 822
 823         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 824         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 825 }
 826
 827 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 828 {
 829         struct g2d_runqueue_node *runqueue_node;
 830
 831         if (list_empty(&g2d->runqueue))
 832                 return NULL;
 833
 834         runqueue_node = list_first_entry(&g2d->runqueue,
 835                                          struct g2d_runqueue_node, list);
 836         list_del_init(&runqueue_node->list);
 837         return runqueue_node;
 838 }
 839
 840 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 841                                    struct g2d_runqueue_node *runqueue_node)
 842 {
 843         struct g2d_cmdlist_node *node;
 844
 845         if (!runqueue_node)
 846                 return;
 847
 848         mutex_lock(&g2d->cmdlist_mutex);
 849         /*
 850          * commands in run_cmdlist have been completed so unmap all gem
 851          * objects in each command node so that they are unreferenced.
 852          */
 853         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 854                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 855         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 856         mutex_unlock(&g2d->cmdlist_mutex);
 857
 858         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 859 }
 860
 861 static void g2d_exec_runqueue(struct g2d_data *g2d)
 862 {
 863         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 864         if (g2d->runqueue_node)
 865                 g2d_dma_start(g2d, g2d->runqueue_node);
 866 }
 867
 868 static void g2d_runqueue_worker(struct work_struct *work)
 869 {
 870         struct g2d_data *g2d = container_of(work, struct g2d_data,
 871                                             runqueue_work);
 872
 873         mutex_lock(&g2d->runqueue_mutex);
 874         clk_disable_unprepare(g2d->gate_clk);
 875         pm_runtime_put_sync(g2d->dev);
 876
 877         complete(&g2d->runqueue_node->complete);
 878         if (g2d->runqueue_node->async)
 879                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 880
 881         if (g2d->suspended)
 882                 g2d->runqueue_node = NULL;
 883         else
 884                 g2d_exec_runqueue(g2d);
 885         mutex_unlock(&g2d->runqueue_mutex);
 886 }
 887
 888 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 889 {
 890         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 891         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 892         struct drm_exynos_pending_g2d_event *e;
 893         struct timeval now;
 894         unsigned long flags;
 895
 896         if (list_empty(&runqueue_node->event_list))
 897                 return;
 898
 899         e = list_first_entry(&runqueue_node->event_list,
 900                              struct drm_exynos_pending_g2d_event, base.link);
 901
 902         do_gettimeofday(&now);
 903         e->event.tv_sec = now.tv_sec;
 904         e->event.tv_usec = now.tv_usec;
 905         e->event.cmdlist_no = cmdlist_no;
 906
 907         spin_lock_irqsave(&drm_dev->event_lock, flags);
 908         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 909         wake_up_interruptible(&e->base.file_priv->event_wait);
 910         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 911 }
 912
 913 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 914 {
 915         struct g2d_data *g2d = dev_id;
 916         u32 pending;
 917
 918         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 919         if (pending)
 920                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 921
 922         if (pending & G2D_INTP_GCMD_FIN) {
 923                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 924
 925                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 926                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 927
 928                 g2d_finish_event(g2d, cmdlist_no);
 929
 930                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 931                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 932                         writel_relaxed(G2D_DMA_CONTINUE,
 933                                         g2d->regs + G2D_DMA_COMMAND);
 934                 }
 935         }
 936
 937         if (pending & G2D_INTP_ACMD_FIN)
 938                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 939
 940         return IRQ_HANDLED;
 941 }
 942
 943 static int g2d_check_reg_offset(struct device *dev,
 944                                 struct g2d_cmdlist_node *node,
 945                                 int nr, bool for_addr)
 946 {
 947         struct g2d_cmdlist *cmdlist = node->cmdlist;
 948         int reg_offset;
 949         int index;
 950         int i;
 951
 952         for (i = 0; i < nr; i++) {
 953                 struct g2d_buf_info *buf_info = &node->buf_info;
 954                 struct g2d_buf_desc *buf_desc;
 955                 enum g2d_reg_type reg_type;
 956                 unsigned long value;
 957
 958                 index = cmdlist->last - 2 * (i + 1);
 959
 960                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 961                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 962                         goto err;
 963                 if (reg_offset % 4)
 964                         goto err;
 965
 966                 switch (reg_offset) {
 967                 case G2D_SRC_BASE_ADDR:
 968                 case G2D_SRC_PLANE2_BASE_ADDR:
 969                 case G2D_DST_BASE_ADDR:
 970                 case G2D_DST_PLANE2_BASE_ADDR:
 971                 case G2D_PAT_BASE_ADDR:
 972                 case G2D_MSK_BASE_ADDR:
 973                         if (!for_addr)
 974                                 goto err;
 975
 976                         reg_type = g2d_get_reg_type(reg_offset);
 977                         if (reg_type == REG_TYPE_NONE)
 978                                 goto err;
 979
 980                         /* check userptr buffer type. */
 981                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 982                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 983                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 984                         } else
 985                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 986                         break;
 987                 case G2D_SRC_COLOR_MODE:
 988                 case G2D_DST_COLOR_MODE:
 989                         if (for_addr)
 990                                 goto err;
 991
 992                         reg_type = g2d_get_reg_type(reg_offset);
 993                         if (reg_type == REG_TYPE_NONE)
 994                                 goto err;
 995
 996                         buf_desc = &buf_info->descs[reg_type];
 997                         value = cmdlist->data[index + 1];
 998
 999                         buf_desc->format = value & 0xf;
1000                         break;
1001                 case G2D_SRC_LEFT_TOP:
1002                 case G2D_DST_LEFT_TOP:
1003                         if (for_addr)
1004                                 goto err;
1005
1006                         reg_type = g2d_get_reg_type(reg_offset);
1007                         if (reg_type == REG_TYPE_NONE)
1008                                 goto err;
1009
1010                         buf_desc = &buf_info->descs[reg_type];
1011                         value = cmdlist->data[index + 1];
1012
1013                         buf_desc->left_x = value & 0x1fff;
1014                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1015                         break;
1016                 case G2D_SRC_RIGHT_BOTTOM:
1017                 case G2D_DST_RIGHT_BOTTOM:
1018                         if (for_addr)
1019                                 goto err;
1020
1021                         reg_type = g2d_get_reg_type(reg_offset);
1022                         if (reg_type == REG_TYPE_NONE)
1023                                 goto err;
1024
1025                         buf_desc = &buf_info->descs[reg_type];
1026                         value = cmdlist->data[index + 1];
1027
1028                         buf_desc->right_x = value & 0x1fff;
1029                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1030                         break;
1031                 default:
1032                         if (for_addr)
1033                                 goto err;
1034                         break;
1035                 }
1036         }
1037
1038         return 0;
1039
1040 err:
1041         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1042         return -EINVAL;
1043 }
1044
1045 /* ioctl functions */
1046 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1047                              struct drm_file *file)
1048 {
1049         struct drm_exynos_g2d_get_ver *ver = data;
1050
1051         ver->major = G2D_HW_MAJOR_VER;
1052         ver->minor = G2D_HW_MINOR_VER;
1053
1054         return 0;
1055 }
1056 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1057
1058 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1059                                  struct drm_file *file)
1060 {
1061         struct drm_exynos_file_private *file_priv = file->driver_priv;
1062         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1063         struct device *dev = g2d_priv->dev;
1064         struct g2d_data *g2d;
1065         struct drm_exynos_g2d_set_cmdlist *req = data;
1066         struct drm_exynos_g2d_cmd *cmd;
1067         struct drm_exynos_pending_g2d_event *e;
1068         struct g2d_cmdlist_node *node;
1069         struct g2d_cmdlist *cmdlist;
1070         unsigned long flags;
1071         int size;
1072         int ret;
1073
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                         dev_err(dev, "failed to allocate event\n");
1100
1101                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1102                         file->event_space += sizeof(e->event);
1103                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1104
1105                         ret = -ENOMEM;
1106                         goto err;
1107                 }
1108
1109                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1110                 e->event.base.length = sizeof(e->event);
1111                 e->event.user_data = req->user_data;
1112                 e->base.event = &e->event.base;
1113                 e->base.file_priv = file;
1114                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1115
1116                 node->event = e;
1117         }
1118
1119         cmdlist = node->cmdlist;
1120
1121         cmdlist->last = 0;
1122
1123         /*
1124          * If don't clear SFR registers, the cmdlist is affected by register
1125          * values of previous cmdlist. G2D hw executes SFR clear command and
1126          * a next command at the same time then the next command is ignored and
1127          * is executed rightly from next next command, so needs a dummy command
1128          * to next command of SFR clear command.
1129          */
1130         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1131         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1132         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1133         cmdlist->data[cmdlist->last++] = 0;
1134
1135         /*
1136          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1137          * and GCF bit should be set to INTEN register if user wants
1138          * G2D interrupt event once current command list execution is
1139          * finished.
1140          * Otherwise only ACF bit should be set to INTEN register so
1141          * that one interrupt is occured after all command lists
1142          * have been completed.
1143          */
1144         if (node->event) {
1145                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1146                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1147                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1148                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1149         } else {
1150                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1151                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1152         }
1153
1154         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1155         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1156         if (size > G2D_CMDLIST_DATA_NUM) {
1157                 dev_err(dev, "cmdlist size is too big\n");
1158                 ret = -EINVAL;
1159                 goto err_free_event;
1160         }
1161
1162         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1163
1164         if (copy_from_user(cmdlist->data + cmdlist->last,
1165                                 (void __user *)cmd,
1166                                 sizeof(*cmd) * req->cmd_nr)) {
1167                 ret = -EFAULT;
1168                 goto err_free_event;
1169         }
1170         cmdlist->last += req->cmd_nr * 2;
1171
1172         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1173         if (ret < 0)
1174                 goto err_free_event;
1175
1176         node->buf_info.map_nr = req->cmd_buf_nr;
1177         if (req->cmd_buf_nr) {
1178                 struct drm_exynos_g2d_cmd *cmd_buf;
1179
1180                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1181
1182                 if (copy_from_user(cmdlist->data + cmdlist->last,
1183                                         (void __user *)cmd_buf,
1184                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1185                         ret = -EFAULT;
1186                         goto err_free_event;
1187                 }
1188                 cmdlist->last += req->cmd_buf_nr * 2;
1189
1190                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1191                 if (ret < 0)
1192                         goto err_free_event;
1193
1194                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1195                 if (ret < 0)
1196                         goto err_unmap;
1197         }
1198
1199         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1200         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1201
1202         /* head */
1203         cmdlist->head = cmdlist->last / 2;
1204
1205         /* tail */
1206         cmdlist->data[cmdlist->last] = 0;
1207
1208         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1209
1210         return 0;
1211
1212 err_unmap:
1213         g2d_unmap_cmdlist_gem(g2d, node, file);
1214 err_free_event:
1215         if (node->event) {
1216                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1217                 file->event_space += sizeof(e->event);
1218                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1219                 kfree(node->event);
1220         }
1221 err:
1222         g2d_put_cmdlist(g2d, node);
1223         return ret;
1224 }
1225 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1226
1227 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1228                           struct drm_file *file)
1229 {
1230         struct drm_exynos_file_private *file_priv = file->driver_priv;
1231         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1232         struct device *dev = g2d_priv->dev;
1233         struct g2d_data *g2d;
1234         struct drm_exynos_g2d_exec *req = data;
1235         struct g2d_runqueue_node *runqueue_node;
1236         struct list_head *run_cmdlist;
1237         struct list_head *event_list;
1238
1239         if (!dev)
1240                 return -ENODEV;
1241
1242         g2d = dev_get_drvdata(dev);
1243         if (!g2d)
1244                 return -EFAULT;
1245
1246         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1247         if (!runqueue_node) {
1248                 dev_err(dev, "failed to allocate memory\n");
1249                 return -ENOMEM;
1250         }
1251         run_cmdlist = &runqueue_node->run_cmdlist;
1252         event_list = &runqueue_node->event_list;
1253         INIT_LIST_HEAD(run_cmdlist);
1254         INIT_LIST_HEAD(event_list);
1255         init_completion(&runqueue_node->complete);
1256         runqueue_node->async = req->async;
1257
1258         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1259         list_splice_init(&g2d_priv->event_list, event_list);
1260
1261         if (list_empty(run_cmdlist)) {
1262                 dev_err(dev, "there is no inuse cmdlist\n");
1263                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1264                 return -EPERM;
1265         }
1266
1267         mutex_lock(&g2d->runqueue_mutex);
1268         runqueue_node->pid = current->pid;
1269         runqueue_node->filp = file;
1270         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1271         if (!g2d->runqueue_node)
1272                 g2d_exec_runqueue(g2d);
1273         mutex_unlock(&g2d->runqueue_mutex);
1274
1275         if (runqueue_node->async)
1276                 goto out;
1277
1278         wait_for_completion(&runqueue_node->complete);
1279         g2d_free_runqueue_node(g2d, runqueue_node);
1280
1281 out:
1282         return 0;
1283 }
1284 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1285
1286 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1287 {
1288         struct g2d_data *g2d;
1289         int ret;
1290
1291         g2d = dev_get_drvdata(dev);
1292         if (!g2d)
1293                 return -EFAULT;
1294
1295         /* allocate dma-aware cmdlist buffer. */
1296         ret = g2d_init_cmdlist(g2d);
1297         if (ret < 0) {
1298                 dev_err(dev, "cmdlist init failed\n");
1299                 return ret;
1300         }
1301
1302         if (!is_drm_iommu_supported(drm_dev))
1303                 return 0;
1304
1305         ret = drm_iommu_attach_device(drm_dev, dev);
1306         if (ret < 0) {
1307                 dev_err(dev, "failed to enable iommu.\n");
1308                 g2d_fini_cmdlist(g2d);
1309         }
1310
1311         return ret;
1312
1313 }
1314
1315 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1316 {
1317         if (!is_drm_iommu_supported(drm_dev))
1318                 return;
1319
1320         drm_iommu_detach_device(drm_dev, dev);
1321 }
1322
1323 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1324                         struct drm_file *file)
1325 {
1326         struct drm_exynos_file_private *file_priv = file->driver_priv;
1327         struct exynos_drm_g2d_private *g2d_priv;
1328
1329         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1330         if (!g2d_priv) {
1331                 dev_err(dev, "failed to allocate g2d private data\n");
1332                 return -ENOMEM;
1333         }
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                 dev_err(dev, "failed to allocate driver data\n");
1391                 return -ENOMEM;
1392         }
1393
1394         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1395                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1396         if (!g2d->runqueue_slab)
1397                 return -ENOMEM;
1398
1399         g2d->dev = dev;
1400
1401         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1402         if (!g2d->g2d_workq) {
1403                 dev_err(dev, "failed to create workqueue\n");
1404                 ret = -EINVAL;
1405                 goto err_destroy_slab;
1406         }
1407
1408         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1409         INIT_LIST_HEAD(&g2d->free_cmdlist);
1410         INIT_LIST_HEAD(&g2d->runqueue);
1411
1412         mutex_init(&g2d->cmdlist_mutex);
1413         mutex_init(&g2d->runqueue_mutex);
1414
1415         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1416         if (IS_ERR(g2d->gate_clk)) {
1417                 dev_err(dev, "failed to get gate clock\n");
1418                 ret = PTR_ERR(g2d->gate_clk);
1419                 goto err_destroy_workqueue;
1420         }
1421
1422         pm_runtime_enable(dev);
1423
1424         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1425
1426         g2d->regs = devm_ioremap_resource(dev, res);
1427         if (IS_ERR(g2d->regs)) {
1428                 ret = PTR_ERR(g2d->regs);
1429                 goto err_put_clk;
1430         }
1431
1432         g2d->irq = platform_get_irq(pdev, 0);
1433         if (g2d->irq < 0) {
1434                 dev_err(dev, "failed to get irq\n");
1435                 ret = g2d->irq;
1436                 goto err_put_clk;
1437         }
1438
1439         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1440                                                                 "drm_g2d", g2d);
1441         if (ret < 0) {
1442                 dev_err(dev, "irq request failed\n");
1443                 goto err_put_clk;
1444         }
1445
1446         g2d->max_pool = MAX_POOL;
1447
1448         platform_set_drvdata(pdev, g2d);
1449
1450         subdrv = &g2d->subdrv;
1451         subdrv->dev = dev;
1452         subdrv->probe = g2d_subdrv_probe;
1453         subdrv->remove = g2d_subdrv_remove;
1454         subdrv->open = g2d_open;
1455         subdrv->close = g2d_close;
1456
1457         ret = exynos_drm_subdrv_register(subdrv);
1458         if (ret < 0) {
1459                 dev_err(dev, "failed to register drm g2d device\n");
1460                 goto err_put_clk;
1461         }
1462
1463         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1464                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1465
1466         return 0;
1467
1468 err_put_clk:
1469         pm_runtime_disable(dev);
1470 err_destroy_workqueue:
1471         destroy_workqueue(g2d->g2d_workq);
1472 err_destroy_slab:
1473         kmem_cache_destroy(g2d->runqueue_slab);
1474         return ret;
1475 }
1476
1477 static int g2d_remove(struct platform_device *pdev)
1478 {
1479         struct g2d_data *g2d = platform_get_drvdata(pdev);
1480
1481         cancel_work_sync(&g2d->runqueue_work);
1482         exynos_drm_subdrv_unregister(&g2d->subdrv);
1483
1484         while (g2d->runqueue_node) {
1485                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1486                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1487         }
1488
1489         pm_runtime_disable(&pdev->dev);
1490
1491         g2d_fini_cmdlist(g2d);
1492         destroy_workqueue(g2d->g2d_workq);
1493         kmem_cache_destroy(g2d->runqueue_slab);
1494
1495         return 0;
1496 }
1497
1498 #ifdef CONFIG_PM_SLEEP
1499 static int g2d_suspend(struct device *dev)
1500 {
1501         struct g2d_data *g2d = dev_get_drvdata(dev);
1502
1503         mutex_lock(&g2d->runqueue_mutex);
1504         g2d->suspended = true;
1505         mutex_unlock(&g2d->runqueue_mutex);
1506
1507         while (g2d->runqueue_node)
1508                 /* FIXME: good range? */
1509                 usleep_range(500, 1000);
1510
1511         flush_work(&g2d->runqueue_work);
1512
1513         return 0;
1514 }
1515
1516 static int g2d_resume(struct device *dev)
1517 {
1518         struct g2d_data *g2d = dev_get_drvdata(dev);
1519
1520         g2d->suspended = false;
1521         g2d_exec_runqueue(g2d);
1522
1523         return 0;
1524 }
1525 #endif
1526
1527 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
1528
1529 #ifdef CONFIG_OF
1530 static const struct of_device_id exynos_g2d_match[] = {
1531         { .compatible = "samsung,exynos5250-g2d" },
1532         {},
1533 };
1534 #endif
1535
1536 struct platform_driver g2d_driver = {
1537         .probe          = g2d_probe,
1538         .remove         = g2d_remove,
1539         .driver         = {
1540                 .name   = "s5p-g2d",
1541                 .owner  = THIS_MODULE,
1542                 .pm     = &g2d_pm_ops,
1543                 .of_match_table = of_match_ptr(exynos_g2d_match),
1544         },
1545 };