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_g2d.h"
  27 #include "exynos_drm_gem.h"
  28 #include "exynos_drm_iommu.h"
  29
  30 #define G2D_HW_MAJOR_VER                4
  31 #define G2D_HW_MINOR_VER                1
  32
  33 /* vaild register range set from user: 0x0104 ~ 0x0880 */
  34 #define G2D_VALID_START                 0x0104
  35 #define G2D_VALID_END                   0x0880
  36
  37 /* general registers */
  38 #define G2D_SOFT_RESET                  0x0000
  39 #define G2D_INTEN                       0x0004
  40 #define G2D_INTC_PEND                   0x000C
  41 #define G2D_DMA_SFR_BASE_ADDR           0x0080
  42 #define G2D_DMA_COMMAND                 0x0084
  43 #define G2D_DMA_STATUS                  0x008C
  44 #define G2D_DMA_HOLD_CMD                0x0090
  45
  46 /* command registers */
  47 #define G2D_BITBLT_START                0x0100
  48
  49 /* registers for base address */
  50 #define G2D_SRC_BASE_ADDR               0x0304
  51 #define G2D_SRC_COLOR_MODE              0x030C
  52 #define G2D_SRC_LEFT_TOP                0x0310
  53 #define G2D_SRC_RIGHT_BOTTOM            0x0314
  54 #define G2D_SRC_PLANE2_BASE_ADDR        0x0318
  55 #define G2D_DST_BASE_ADDR               0x0404
  56 #define G2D_DST_COLOR_MODE              0x040C
  57 #define G2D_DST_LEFT_TOP                0x0410
  58 #define G2D_DST_RIGHT_BOTTOM            0x0414
  59 #define G2D_DST_PLANE2_BASE_ADDR        0x0418
  60 #define G2D_PAT_BASE_ADDR               0x0500
  61 #define G2D_MSK_BASE_ADDR               0x0520
  62
  63 /* G2D_SOFT_RESET */
  64 #define G2D_SFRCLEAR                    (1 << 1)
  65 #define G2D_R                           (1 << 0)
  66
  67 /* G2D_INTEN */
  68 #define G2D_INTEN_ACF                   (1 << 3)
  69 #define G2D_INTEN_UCF                   (1 << 2)
  70 #define G2D_INTEN_GCF                   (1 << 1)
  71 #define G2D_INTEN_SCF                   (1 << 0)
  72
  73 /* G2D_INTC_PEND */
  74 #define G2D_INTP_ACMD_FIN               (1 << 3)
  75 #define G2D_INTP_UCMD_FIN               (1 << 2)
  76 #define G2D_INTP_GCMD_FIN               (1 << 1)
  77 #define G2D_INTP_SCMD_FIN               (1 << 0)
  78
  79 /* G2D_DMA_COMMAND */
  80 #define G2D_DMA_HALT                    (1 << 2)
  81 #define G2D_DMA_CONTINUE                (1 << 1)
  82 #define G2D_DMA_START                   (1 << 0)
  83
  84 /* G2D_DMA_STATUS */
  85 #define G2D_DMA_LIST_DONE_COUNT         (0xFF << 17)
  86 #define G2D_DMA_BITBLT_DONE_COUNT       (0xFFFF << 1)
  87 #define G2D_DMA_DONE                    (1 << 0)
  88 #define G2D_DMA_LIST_DONE_COUNT_OFFSET  17
  89
  90 /* G2D_DMA_HOLD_CMD */
  91 #define G2D_USER_HOLD                   (1 << 2)
  92 #define G2D_LIST_HOLD                   (1 << 1)
  93 #define G2D_BITBLT_HOLD                 (1 << 0)
  94
  95 /* G2D_BITBLT_START */
  96 #define G2D_START_CASESEL               (1 << 2)
  97 #define G2D_START_NHOLT                 (1 << 1)
  98 #define G2D_START_BITBLT                (1 << 0)
  99
 100 /* buffer color format */
 101 #define G2D_FMT_XRGB8888                0
 102 #define G2D_FMT_ARGB8888                1
 103 #define G2D_FMT_RGB565                  2
 104 #define G2D_FMT_XRGB1555                3
 105 #define G2D_FMT_ARGB1555                4
 106 #define G2D_FMT_XRGB4444                5
 107 #define G2D_FMT_ARGB4444                6
 108 #define G2D_FMT_PACKED_RGB888           7
 109 #define G2D_FMT_A8                      11
 110 #define G2D_FMT_L8                      12
 111
 112 /* buffer valid length */
 113 #define G2D_LEN_MIN                     1
 114 #define G2D_LEN_MAX                     8000
 115
 116 #define G2D_CMDLIST_SIZE                (PAGE_SIZE / 4)
 117 #define G2D_CMDLIST_NUM                 64
 118 #define G2D_CMDLIST_POOL_SIZE           (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
 119 #define G2D_CMDLIST_DATA_NUM            (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
 120
 121 /* maximum buffer pool size of userptr is 64MB as default */
 122 #define MAX_POOL                (64 * 1024 * 1024)
 123
 124 enum {
 125         BUF_TYPE_GEM = 1,
 126         BUF_TYPE_USERPTR,
 127 };
 128
 129 enum g2d_reg_type {
 130         REG_TYPE_NONE = -1,
 131         REG_TYPE_SRC,
 132         REG_TYPE_SRC_PLANE2,
 133         REG_TYPE_DST,
 134         REG_TYPE_DST_PLANE2,
 135         REG_TYPE_PAT,
 136         REG_TYPE_MSK,
 137         MAX_REG_TYPE_NR
 138 };
 139
 140 /* cmdlist data structure */
 141 struct g2d_cmdlist {
 142         u32             head;
 143         unsigned long   data[G2D_CMDLIST_DATA_NUM];
 144         u32             last;   /* last data offset */
 145 };
 146
 147 /*
 148  * A structure of buffer description
 149  *
 150  * @format: color format
 151  * @left_x: the x coordinates of left top corner
 152  * @top_y: the y coordinates of left top corner
 153  * @right_x: the x coordinates of right bottom corner
 154  * @bottom_y: the y coordinates of right bottom corner
 155  *
 156  */
 157 struct g2d_buf_desc {
 158         unsigned int    format;
 159         unsigned int    left_x;
 160         unsigned int    top_y;
 161         unsigned int    right_x;
 162         unsigned int    bottom_y;
 163 };
 164
 165 /*
 166  * A structure of buffer information
 167  *
 168  * @map_nr: manages the number of mapped buffers
 169  * @reg_types: stores regitster type in the order of requested command
 170  * @handles: stores buffer handle in its reg_type position
 171  * @types: stores buffer type in its reg_type position
 172  * @descs: stores buffer description in its reg_type position
 173  *
 174  */
 175 struct g2d_buf_info {
 176         unsigned int            map_nr;
 177         enum g2d_reg_type       reg_types[MAX_REG_TYPE_NR];
 178         unsigned long           handles[MAX_REG_TYPE_NR];
 179         unsigned int            types[MAX_REG_TYPE_NR];
 180         struct g2d_buf_desc     descs[MAX_REG_TYPE_NR];
 181 };
 182
 183 struct drm_exynos_pending_g2d_event {
 184         struct drm_pending_event        base;
 185         struct drm_exynos_g2d_event     event;
 186 };
 187
 188 struct g2d_cmdlist_userptr {
 189         struct list_head        list;
 190         dma_addr_t              dma_addr;
 191         unsigned long           userptr;
 192         unsigned long           size;
 193         struct page             **pages;
 194         unsigned int            npages;
 195         struct sg_table         *sgt;
 196         struct vm_area_struct   *vma;
 197         atomic_t                refcount;
 198         bool                    in_pool;
 199         bool                    out_of_list;
 200 };
 201 struct g2d_cmdlist_node {
 202         struct list_head        list;
 203         struct g2d_cmdlist      *cmdlist;
 204         dma_addr_t              dma_addr;
 205         struct g2d_buf_info     buf_info;
 206
 207         struct drm_exynos_pending_g2d_event     *event;
 208 };
 209
 210 struct g2d_runqueue_node {
 211         struct list_head        list;
 212         struct list_head        run_cmdlist;
 213         struct list_head        event_list;
 214         struct drm_file         *filp;
 215         pid_t                   pid;
 216         struct completion       complete;
 217         int                     async;
 218 };
 219
 220 struct g2d_data {
 221         struct device                   *dev;
 222         struct clk                      *gate_clk;
 223         void __iomem                    *regs;
 224         int                             irq;
 225         struct workqueue_struct         *g2d_workq;
 226         struct work_struct              runqueue_work;
 227         struct exynos_drm_subdrv        subdrv;
 228         bool                            suspended;
 229
 230         /* cmdlist */
 231         struct g2d_cmdlist_node         *cmdlist_node;
 232         struct list_head                free_cmdlist;
 233         struct mutex                    cmdlist_mutex;
 234         dma_addr_t                      cmdlist_pool;
 235         void                            *cmdlist_pool_virt;
 236         struct dma_attrs                cmdlist_dma_attrs;
 237
 238         /* runqueue*/
 239         struct g2d_runqueue_node        *runqueue_node;
 240         struct list_head                runqueue;
 241         struct mutex                    runqueue_mutex;
 242         struct kmem_cache               *runqueue_slab;
 243
 244         unsigned long                   current_pool;
 245         unsigned long                   max_pool;
 246 };
 247
 248 static int g2d_init_cmdlist(struct g2d_data *g2d)
 249 {
 250         struct device *dev = g2d->dev;
 251         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
 252         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 253         int nr;
 254         int ret;
 255         struct g2d_buf_info *buf_info;
 256
 257         init_dma_attrs(&g2d->cmdlist_dma_attrs);
 258         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
 259
 260         g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
 261                                                 G2D_CMDLIST_POOL_SIZE,
 262                                                 &g2d->cmdlist_pool, GFP_KERNEL,
 263                                                 &g2d->cmdlist_dma_attrs);
 264         if (!g2d->cmdlist_pool_virt) {
 265                 dev_err(dev, "failed to allocate dma memory\n");
 266                 return -ENOMEM;
 267         }
 268
 269         node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
 270         if (!node) {
 271                 dev_err(dev, "failed to allocate memory\n");
 272                 ret = -ENOMEM;
 273                 goto err;
 274         }
 275
 276         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
 277                 unsigned int i;
 278
 279                 node[nr].cmdlist =
 280                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
 281                 node[nr].dma_addr =
 282                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
 283
 284                 buf_info = &node[nr].buf_info;
 285                 for (i = 0; i < MAX_REG_TYPE_NR; i++)
 286                         buf_info->reg_types[i] = REG_TYPE_NONE;
 287
 288                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
 289         }
 290
 291         return 0;
 292
 293 err:
 294         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 295                         g2d->cmdlist_pool_virt,
 296                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 297         return ret;
 298 }
 299
 300 static void g2d_fini_cmdlist(struct g2d_data *g2d)
 301 {
 302         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 303
 304         kfree(g2d->cmdlist_node);
 305         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 306                         g2d->cmdlist_pool_virt,
 307                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 308 }
 309
 310 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 311 {
 312         struct device *dev = g2d->dev;
 313         struct g2d_cmdlist_node *node;
 314
 315         mutex_lock(&g2d->cmdlist_mutex);
 316         if (list_empty(&g2d->free_cmdlist)) {
 317                 dev_err(dev, "there is no free cmdlist\n");
 318                 mutex_unlock(&g2d->cmdlist_mutex);
 319                 return NULL;
 320         }
 321
 322         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 323                                 list);
 324         list_del_init(&node->list);
 325         mutex_unlock(&g2d->cmdlist_mutex);
 326
 327         return node;
 328 }
 329
 330 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 331 {
 332         mutex_lock(&g2d->cmdlist_mutex);
 333         list_move_tail(&node->list, &g2d->free_cmdlist);
 334         mutex_unlock(&g2d->cmdlist_mutex);
 335 }
 336
 337 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 338                                      struct g2d_cmdlist_node *node)
 339 {
 340         struct g2d_cmdlist_node *lnode;
 341
 342         if (list_empty(&g2d_priv->inuse_cmdlist))
 343                 goto add_to_list;
 344
 345         /* this links to base address of new cmdlist */
 346         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 347                                 struct g2d_cmdlist_node, list);
 348         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 349
 350 add_to_list:
 351         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 352
 353         if (node->event)
 354                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 355 }
 356
 357 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 358                                         unsigned long obj,
 359                                         bool force)
 360 {
 361         struct g2d_cmdlist_userptr *g2d_userptr =
 362                                         (struct g2d_cmdlist_userptr *)obj;
 363
 364         if (!obj)
 365                 return;
 366
 367         if (force)
 368                 goto out;
 369
 370         atomic_dec(&g2d_userptr->refcount);
 371
 372         if (atomic_read(&g2d_userptr->refcount) > 0)
 373                 return;
 374
 375         if (g2d_userptr->in_pool)
 376                 return;
 377
 378 out:
 379         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
 380                                         DMA_BIDIRECTIONAL);
 381
 382         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 383                                         g2d_userptr->npages,
 384                                         g2d_userptr->vma);
 385
 386         exynos_gem_put_vma(g2d_userptr->vma);
 387
 388         if (!g2d_userptr->out_of_list)
 389                 list_del_init(&g2d_userptr->list);
 390
 391         sg_free_table(g2d_userptr->sgt);
 392         kfree(g2d_userptr->sgt);
 393
 394         drm_free_large(g2d_userptr->pages);
 395         kfree(g2d_userptr);
 396 }
 397
 398 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 399                                         unsigned long userptr,
 400                                         unsigned long size,
 401                                         struct drm_file *filp,
 402                                         unsigned long *obj)
 403 {
 404         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 405         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 406         struct g2d_cmdlist_userptr *g2d_userptr;
 407         struct g2d_data *g2d;
 408         struct page **pages;
 409         struct sg_table *sgt;
 410         struct vm_area_struct *vma;
 411         unsigned long start, end;
 412         unsigned int npages, offset;
 413         int ret;
 414
 415         if (!size) {
 416                 DRM_ERROR("invalid userptr size.\n");
 417                 return ERR_PTR(-EINVAL);
 418         }
 419
 420         g2d = dev_get_drvdata(g2d_priv->dev);
 421
 422         /* check if userptr already exists in userptr_list. */
 423         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 424                 if (g2d_userptr->userptr == userptr) {
 425                         /*
 426                          * also check size because there could be same address
 427                          * and different size.
 428                          */
 429                         if (g2d_userptr->size == size) {
 430                                 atomic_inc(&g2d_userptr->refcount);
 431                                 *obj = (unsigned long)g2d_userptr;
 432
 433                                 return &g2d_userptr->dma_addr;
 434                         }
 435
 436                         /*
 437                          * at this moment, maybe g2d dma is accessing this
 438                          * g2d_userptr memory region so just remove this
 439                          * g2d_userptr object from userptr_list not to be
 440                          * referred again and also except it the userptr
 441                          * pool to be released after the dma access completion.
 442                          */
 443                         g2d_userptr->out_of_list = true;
 444                         g2d_userptr->in_pool = false;
 445                         list_del_init(&g2d_userptr->list);
 446
 447                         break;
 448                 }
 449         }
 450
 451         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 452         if (!g2d_userptr)
 453                 return ERR_PTR(-ENOMEM);
 454
 455         atomic_set(&g2d_userptr->refcount, 1);
 456
 457         start = userptr & PAGE_MASK;
 458         offset = userptr & ~PAGE_MASK;
 459         end = PAGE_ALIGN(userptr + size);
 460         npages = (end - start) >> PAGE_SHIFT;
 461         g2d_userptr->npages = npages;
 462
 463         pages = drm_calloc_large(npages, sizeof(struct page *));
 464         if (!pages) {
 465                 DRM_ERROR("failed to allocate pages.\n");
 466                 ret = -ENOMEM;
 467                 goto err_free;
 468         }
 469
 470         down_read(&current->mm->mmap_sem);
 471         vma = find_vma(current->mm, userptr);
 472         if (!vma) {
 473                 up_read(&current->mm->mmap_sem);
 474                 DRM_ERROR("failed to get vm region.\n");
 475                 ret = -EFAULT;
 476                 goto err_free_pages;
 477         }
 478
 479         if (vma->vm_end < userptr + size) {
 480                 up_read(&current->mm->mmap_sem);
 481                 DRM_ERROR("vma is too small.\n");
 482                 ret = -EFAULT;
 483                 goto err_free_pages;
 484         }
 485
 486         g2d_userptr->vma = exynos_gem_get_vma(vma);
 487         if (!g2d_userptr->vma) {
 488                 up_read(&current->mm->mmap_sem);
 489                 DRM_ERROR("failed to copy vma.\n");
 490                 ret = -ENOMEM;
 491                 goto err_free_pages;
 492         }
 493
 494         g2d_userptr->size = size;
 495
 496         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
 497                                                 npages, pages, vma);
 498         if (ret < 0) {
 499                 up_read(&current->mm->mmap_sem);
 500                 DRM_ERROR("failed to get user pages from userptr.\n");
 501                 goto err_put_vma;
 502         }
 503
 504         up_read(&current->mm->mmap_sem);
 505         g2d_userptr->pages = pages;
 506
 507         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 508         if (!sgt) {
 509                 ret = -ENOMEM;
 510                 goto err_free_userptr;
 511         }
 512
 513         ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
 514                                         size, GFP_KERNEL);
 515         if (ret < 0) {
 516                 DRM_ERROR("failed to get sgt from pages.\n");
 517                 goto err_free_sgt;
 518         }
 519
 520         g2d_userptr->sgt = sgt;
 521
 522         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 523                                                 DMA_BIDIRECTIONAL);
 524         if (ret < 0) {
 525                 DRM_ERROR("failed to map sgt with dma region.\n");
 526                 goto err_sg_free_table;
 527         }
 528
 529         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 530         g2d_userptr->userptr = userptr;
 531
 532         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 533
 534         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 535                 g2d->current_pool += npages << PAGE_SHIFT;
 536                 g2d_userptr->in_pool = true;
 537         }
 538
 539         *obj = (unsigned long)g2d_userptr;
 540
 541         return &g2d_userptr->dma_addr;
 542
 543 err_sg_free_table:
 544         sg_free_table(sgt);
 545
 546 err_free_sgt:
 547         kfree(sgt);
 548
 549 err_free_userptr:
 550         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 551                                         g2d_userptr->npages,
 552                                         g2d_userptr->vma);
 553
 554 err_put_vma:
 555         exynos_gem_put_vma(g2d_userptr->vma);
 556
 557 err_free_pages:
 558         drm_free_large(pages);
 559
 560 err_free:
 561         kfree(g2d_userptr);
 562
 563         return ERR_PTR(ret);
 564 }
 565
 566 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 567                                         struct g2d_data *g2d,
 568                                         struct drm_file *filp)
 569 {
 570         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 571         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 572         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 573
 574         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 575                 if (g2d_userptr->in_pool)
 576                         g2d_userptr_put_dma_addr(drm_dev,
 577                                                 (unsigned long)g2d_userptr,
 578                                                 true);
 579
 580         g2d->current_pool = 0;
 581 }
 582
 583 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 584 {
 585         enum g2d_reg_type reg_type;
 586
 587         switch (reg_offset) {
 588         case G2D_SRC_BASE_ADDR:
 589         case G2D_SRC_COLOR_MODE:
 590         case G2D_SRC_LEFT_TOP:
 591         case G2D_SRC_RIGHT_BOTTOM:
 592                 reg_type = REG_TYPE_SRC;
 593                 break;
 594         case G2D_SRC_PLANE2_BASE_ADDR:
 595                 reg_type = REG_TYPE_SRC_PLANE2;
 596                 break;
 597         case G2D_DST_BASE_ADDR:
 598         case G2D_DST_COLOR_MODE:
 599         case G2D_DST_LEFT_TOP:
 600         case G2D_DST_RIGHT_BOTTOM:
 601                 reg_type = REG_TYPE_DST;
 602                 break;
 603         case G2D_DST_PLANE2_BASE_ADDR:
 604                 reg_type = REG_TYPE_DST_PLANE2;
 605                 break;
 606         case G2D_PAT_BASE_ADDR:
 607                 reg_type = REG_TYPE_PAT;
 608                 break;
 609         case G2D_MSK_BASE_ADDR:
 610                 reg_type = REG_TYPE_MSK;
 611                 break;
 612         default:
 613                 reg_type = REG_TYPE_NONE;
 614                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 615                 break;
 616         }
 617
 618         return reg_type;
 619 }
 620
 621 static unsigned long g2d_get_buf_bpp(unsigned int format)
 622 {
 623         unsigned long bpp;
 624
 625         switch (format) {
 626         case G2D_FMT_XRGB8888:
 627         case G2D_FMT_ARGB8888:
 628                 bpp = 4;
 629                 break;
 630         case G2D_FMT_RGB565:
 631         case G2D_FMT_XRGB1555:
 632         case G2D_FMT_ARGB1555:
 633         case G2D_FMT_XRGB4444:
 634         case G2D_FMT_ARGB4444:
 635                 bpp = 2;
 636                 break;
 637         case G2D_FMT_PACKED_RGB888:
 638                 bpp = 3;
 639                 break;
 640         default:
 641                 bpp = 1;
 642                 break;
 643         }
 644
 645         return bpp;
 646 }
 647
 648 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 649                                                 enum g2d_reg_type reg_type,
 650                                                 unsigned long size)
 651 {
 652         unsigned int width, height;
 653         unsigned long area;
 654
 655         /*
 656          * check source and destination buffers only.
 657          * so the others are always valid.
 658          */
 659         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 660                 return true;
 661
 662         width = buf_desc->right_x - buf_desc->left_x;
 663         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 664                 DRM_ERROR("width[%u] is out of range!\n", width);
 665                 return false;
 666         }
 667
 668         height = buf_desc->bottom_y - buf_desc->top_y;
 669         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 670                 DRM_ERROR("height[%u] is out of range!\n", height);
 671                 return false;
 672         }
 673
 674         area = (unsigned long)width * (unsigned long)height *
 675                                         g2d_get_buf_bpp(buf_desc->format);
 676         if (area > size) {
 677                 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
 678                 return false;
 679         }
 680
 681         return true;
 682 }
 683
 684 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 685                                 struct g2d_cmdlist_node *node,
 686                                 struct drm_device *drm_dev,
 687                                 struct drm_file *file)
 688 {
 689         struct g2d_cmdlist *cmdlist = node->cmdlist;
 690         struct g2d_buf_info *buf_info = &node->buf_info;
 691         int offset;
 692         int ret;
 693         int i;
 694
 695         for (i = 0; i < buf_info->map_nr; i++) {
 696                 struct g2d_buf_desc *buf_desc;
 697                 enum g2d_reg_type reg_type;
 698                 int reg_pos;
 699                 unsigned long handle;
 700                 dma_addr_t *addr;
 701
 702                 reg_pos = cmdlist->last - 2 * (i + 1);
 703
 704                 offset = cmdlist->data[reg_pos];
 705                 handle = cmdlist->data[reg_pos + 1];
 706
 707                 reg_type = g2d_get_reg_type(offset);
 708                 if (reg_type == REG_TYPE_NONE) {
 709                         ret = -EFAULT;
 710                         goto err;
 711                 }
 712
 713                 buf_desc = &buf_info->descs[reg_type];
 714
 715                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 716                         unsigned long size;
 717
 718                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 719                         if (!size) {
 720                                 ret = -EFAULT;
 721                                 goto err;
 722                         }
 723
 724                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 725                                                                         size)) {
 726                                 ret = -EFAULT;
 727                                 goto err;
 728                         }
 729
 730                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 731                                                                 file);
 732                         if (IS_ERR(addr)) {
 733                                 ret = -EFAULT;
 734                                 goto err;
 735                         }
 736                 } else {
 737                         struct drm_exynos_g2d_userptr g2d_userptr;
 738
 739                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 740                                 sizeof(struct drm_exynos_g2d_userptr))) {
 741                                 ret = -EFAULT;
 742                                 goto err;
 743                         }
 744
 745                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 746                                                         g2d_userptr.size)) {
 747                                 ret = -EFAULT;
 748                                 goto err;
 749                         }
 750
 751                         addr = g2d_userptr_get_dma_addr(drm_dev,
 752                                                         g2d_userptr.userptr,
 753                                                         g2d_userptr.size,
 754                                                         file,
 755                                                         &handle);
 756                         if (IS_ERR(addr)) {
 757                                 ret = -EFAULT;
 758                                 goto err;
 759                         }
 760                 }
 761
 762                 cmdlist->data[reg_pos + 1] = *addr;
 763                 buf_info->reg_types[i] = reg_type;
 764                 buf_info->handles[reg_type] = handle;
 765         }
 766
 767         return 0;
 768
 769 err:
 770         buf_info->map_nr = i;
 771         return ret;
 772 }
 773
 774 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 775                                   struct g2d_cmdlist_node *node,
 776                                   struct drm_file *filp)
 777 {
 778         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 779         struct g2d_buf_info *buf_info = &node->buf_info;
 780         int i;
 781
 782         for (i = 0; i < buf_info->map_nr; i++) {
 783                 struct g2d_buf_desc *buf_desc;
 784                 enum g2d_reg_type reg_type;
 785                 unsigned long handle;
 786
 787                 reg_type = buf_info->reg_types[i];
 788
 789                 buf_desc = &buf_info->descs[reg_type];
 790                 handle = buf_info->handles[reg_type];
 791
 792                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 793                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 794                                                         filp);
 795                 else
 796                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 797                                                         false);
 798
 799                 buf_info->reg_types[i] = REG_TYPE_NONE;
 800                 buf_info->handles[reg_type] = 0;
 801                 buf_info->types[reg_type] = 0;
 802                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 803         }
 804
 805         buf_info->map_nr = 0;
 806 }
 807
 808 static void g2d_dma_start(struct g2d_data *g2d,
 809                           struct g2d_runqueue_node *runqueue_node)
 810 {
 811         struct g2d_cmdlist_node *node =
 812                                 list_first_entry(&runqueue_node->run_cmdlist,
 813                                                 struct g2d_cmdlist_node, list);
 814         int ret;
 815
 816         ret = pm_runtime_get_sync(g2d->dev);
 817         if (ret < 0)
 818                 return;
 819
 820         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 821         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 822 }
 823
 824 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 825 {
 826         struct g2d_runqueue_node *runqueue_node;
 827
 828         if (list_empty(&g2d->runqueue))
 829                 return NULL;
 830
 831         runqueue_node = list_first_entry(&g2d->runqueue,
 832                                          struct g2d_runqueue_node, list);
 833         list_del_init(&runqueue_node->list);
 834         return runqueue_node;
 835 }
 836
 837 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 838                                    struct g2d_runqueue_node *runqueue_node)
 839 {
 840         struct g2d_cmdlist_node *node;
 841
 842         if (!runqueue_node)
 843                 return;
 844
 845         mutex_lock(&g2d->cmdlist_mutex);
 846         /*
 847          * commands in run_cmdlist have been completed so unmap all gem
 848          * objects in each command node so that they are unreferenced.
 849          */
 850         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 851                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 852         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 853         mutex_unlock(&g2d->cmdlist_mutex);
 854
 855         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 856 }
 857
 858 static void g2d_exec_runqueue(struct g2d_data *g2d)
 859 {
 860         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 861         if (g2d->runqueue_node)
 862                 g2d_dma_start(g2d, g2d->runqueue_node);
 863 }
 864
 865 static void g2d_runqueue_worker(struct work_struct *work)
 866 {
 867         struct g2d_data *g2d = container_of(work, struct g2d_data,
 868                                             runqueue_work);
 869
 870         mutex_lock(&g2d->runqueue_mutex);
 871         pm_runtime_put_sync(g2d->dev);
 872
 873         complete(&g2d->runqueue_node->complete);
 874         if (g2d->runqueue_node->async)
 875                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 876
 877         if (g2d->suspended)
 878                 g2d->runqueue_node = NULL;
 879         else
 880                 g2d_exec_runqueue(g2d);
 881         mutex_unlock(&g2d->runqueue_mutex);
 882 }
 883
 884 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 885 {
 886         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 887         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 888         struct drm_exynos_pending_g2d_event *e;
 889         struct timeval now;
 890         unsigned long flags;
 891
 892         if (list_empty(&runqueue_node->event_list))
 893                 return;
 894
 895         e = list_first_entry(&runqueue_node->event_list,
 896                              struct drm_exynos_pending_g2d_event, base.link);
 897
 898         do_gettimeofday(&now);
 899         e->event.tv_sec = now.tv_sec;
 900         e->event.tv_usec = now.tv_usec;
 901         e->event.cmdlist_no = cmdlist_no;
 902
 903         spin_lock_irqsave(&drm_dev->event_lock, flags);
 904         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 905         wake_up_interruptible(&e->base.file_priv->event_wait);
 906         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 907 }
 908
 909 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 910 {
 911         struct g2d_data *g2d = dev_id;
 912         u32 pending;
 913
 914         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 915         if (pending)
 916                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 917
 918         if (pending & G2D_INTP_GCMD_FIN) {
 919                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 920
 921                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 922                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 923
 924                 g2d_finish_event(g2d, cmdlist_no);
 925
 926                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 927                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 928                         writel_relaxed(G2D_DMA_CONTINUE,
 929                                         g2d->regs + G2D_DMA_COMMAND);
 930                 }
 931         }
 932
 933         if (pending & G2D_INTP_ACMD_FIN)
 934                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 935
 936         return IRQ_HANDLED;
 937 }
 938
 939 static int g2d_check_reg_offset(struct device *dev,
 940                                 struct g2d_cmdlist_node *node,
 941                                 int nr, bool for_addr)
 942 {
 943         struct g2d_cmdlist *cmdlist = node->cmdlist;
 944         int reg_offset;
 945         int index;
 946         int i;
 947
 948         for (i = 0; i < nr; i++) {
 949                 struct g2d_buf_info *buf_info = &node->buf_info;
 950                 struct g2d_buf_desc *buf_desc;
 951                 enum g2d_reg_type reg_type;
 952                 unsigned long value;
 953
 954                 index = cmdlist->last - 2 * (i + 1);
 955
 956                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 957                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 958                         goto err;
 959                 if (reg_offset % 4)
 960                         goto err;
 961
 962                 switch (reg_offset) {
 963                 case G2D_SRC_BASE_ADDR:
 964                 case G2D_SRC_PLANE2_BASE_ADDR:
 965                 case G2D_DST_BASE_ADDR:
 966                 case G2D_DST_PLANE2_BASE_ADDR:
 967                 case G2D_PAT_BASE_ADDR:
 968                 case G2D_MSK_BASE_ADDR:
 969                         if (!for_addr)
 970                                 goto err;
 971
 972                         reg_type = g2d_get_reg_type(reg_offset);
 973                         if (reg_type == REG_TYPE_NONE)
 974                                 goto err;
 975
 976                         /* check userptr buffer type. */
 977                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 978                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 979                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 980                         } else
 981                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 982                         break;
 983                 case G2D_SRC_COLOR_MODE:
 984                 case G2D_DST_COLOR_MODE:
 985                         if (for_addr)
 986                                 goto err;
 987
 988                         reg_type = g2d_get_reg_type(reg_offset);
 989                         if (reg_type == REG_TYPE_NONE)
 990                                 goto err;
 991
 992                         buf_desc = &buf_info->descs[reg_type];
 993                         value = cmdlist->data[index + 1];
 994
 995                         buf_desc->format = value & 0xf;
 996                         break;
 997                 case G2D_SRC_LEFT_TOP:
 998                 case G2D_DST_LEFT_TOP:
 999                         if (for_addr)
1000                                 goto err;
1001
1002                         reg_type = g2d_get_reg_type(reg_offset);
1003                         if (reg_type == REG_TYPE_NONE)
1004                                 goto err;
1005
1006                         buf_desc = &buf_info->descs[reg_type];
1007                         value = cmdlist->data[index + 1];
1008
1009                         buf_desc->left_x = value & 0x1fff;
1010                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1011                         break;
1012                 case G2D_SRC_RIGHT_BOTTOM:
1013                 case G2D_DST_RIGHT_BOTTOM:
1014                         if (for_addr)
1015                                 goto err;
1016
1017                         reg_type = g2d_get_reg_type(reg_offset);
1018                         if (reg_type == REG_TYPE_NONE)
1019                                 goto err;
1020
1021                         buf_desc = &buf_info->descs[reg_type];
1022                         value = cmdlist->data[index + 1];
1023
1024                         buf_desc->right_x = value & 0x1fff;
1025                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1026                         break;
1027                 default:
1028                         if (for_addr)
1029                                 goto err;
1030                         break;
1031                 }
1032         }
1033
1034         return 0;
1035
1036 err:
1037         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1038         return -EINVAL;
1039 }
1040
1041 /* ioctl functions */
1042 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1043                              struct drm_file *file)
1044 {
1045         struct drm_exynos_g2d_get_ver *ver = data;
1046
1047         ver->major = G2D_HW_MAJOR_VER;
1048         ver->minor = G2D_HW_MINOR_VER;
1049
1050         return 0;
1051 }
1052 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1053
1054 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1055                                  struct drm_file *file)
1056 {
1057         struct drm_exynos_file_private *file_priv = file->driver_priv;
1058         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1059         struct device *dev = g2d_priv->dev;
1060         struct g2d_data *g2d;
1061         struct drm_exynos_g2d_set_cmdlist *req = data;
1062         struct drm_exynos_g2d_cmd *cmd;
1063         struct drm_exynos_pending_g2d_event *e;
1064         struct g2d_cmdlist_node *node;
1065         struct g2d_cmdlist *cmdlist;
1066         unsigned long flags;
1067         int size;
1068         int ret;
1069
1070         if (!dev)
1071                 return -ENODEV;
1072
1073         g2d = dev_get_drvdata(dev);
1074         if (!g2d)
1075                 return -EFAULT;
1076
1077         node = g2d_get_cmdlist(g2d);
1078         if (!node)
1079                 return -ENOMEM;
1080
1081         node->event = NULL;
1082
1083         if (req->event_type != G2D_EVENT_NOT) {
1084                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1085                 if (file->event_space < sizeof(e->event)) {
1086                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1087                         ret = -ENOMEM;
1088                         goto err;
1089                 }
1090                 file->event_space -= sizeof(e->event);
1091                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1092
1093                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1094                 if (!e) {
1095                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1096                         file->event_space += sizeof(e->event);
1097                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1098
1099                         ret = -ENOMEM;
1100                         goto err;
1101                 }
1102
1103                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1104                 e->event.base.length = sizeof(e->event);
1105                 e->event.user_data = req->user_data;
1106                 e->base.event = &e->event.base;
1107                 e->base.file_priv = file;
1108                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1109
1110                 node->event = e;
1111         }
1112
1113         cmdlist = node->cmdlist;
1114
1115         cmdlist->last = 0;
1116
1117         /*
1118          * If don't clear SFR registers, the cmdlist is affected by register
1119          * values of previous cmdlist. G2D hw executes SFR clear command and
1120          * a next command at the same time then the next command is ignored and
1121          * is executed rightly from next next command, so needs a dummy command
1122          * to next command of SFR clear command.
1123          */
1124         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1125         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1126         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1127         cmdlist->data[cmdlist->last++] = 0;
1128
1129         /*
1130          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1131          * and GCF bit should be set to INTEN register if user wants
1132          * G2D interrupt event once current command list execution is
1133          * finished.
1134          * Otherwise only ACF bit should be set to INTEN register so
1135          * that one interrupt is occurred after all command lists
1136          * have been completed.
1137          */
1138         if (node->event) {
1139                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1140                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1141                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1142                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1143         } else {
1144                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1145                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1146         }
1147
1148         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1149         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1150         if (size > G2D_CMDLIST_DATA_NUM) {
1151                 dev_err(dev, "cmdlist size is too big\n");
1152                 ret = -EINVAL;
1153                 goto err_free_event;
1154         }
1155
1156         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1157
1158         if (copy_from_user(cmdlist->data + cmdlist->last,
1159                                 (void __user *)cmd,
1160                                 sizeof(*cmd) * req->cmd_nr)) {
1161                 ret = -EFAULT;
1162                 goto err_free_event;
1163         }
1164         cmdlist->last += req->cmd_nr * 2;
1165
1166         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1167         if (ret < 0)
1168                 goto err_free_event;
1169
1170         node->buf_info.map_nr = req->cmd_buf_nr;
1171         if (req->cmd_buf_nr) {
1172                 struct drm_exynos_g2d_cmd *cmd_buf;
1173
1174                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1175
1176                 if (copy_from_user(cmdlist->data + cmdlist->last,
1177                                         (void __user *)cmd_buf,
1178                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1179                         ret = -EFAULT;
1180                         goto err_free_event;
1181                 }
1182                 cmdlist->last += req->cmd_buf_nr * 2;
1183
1184                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1185                 if (ret < 0)
1186                         goto err_free_event;
1187
1188                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1189                 if (ret < 0)
1190                         goto err_unmap;
1191         }
1192
1193         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1194         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1195
1196         /* head */
1197         cmdlist->head = cmdlist->last / 2;
1198
1199         /* tail */
1200         cmdlist->data[cmdlist->last] = 0;
1201
1202         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1203
1204         return 0;
1205
1206 err_unmap:
1207         g2d_unmap_cmdlist_gem(g2d, node, file);
1208 err_free_event:
1209         if (node->event) {
1210                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1211                 file->event_space += sizeof(e->event);
1212                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1213                 kfree(node->event);
1214         }
1215 err:
1216         g2d_put_cmdlist(g2d, node);
1217         return ret;
1218 }
1219 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1220
1221 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1222                           struct drm_file *file)
1223 {
1224         struct drm_exynos_file_private *file_priv = file->driver_priv;
1225         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1226         struct device *dev = g2d_priv->dev;
1227         struct g2d_data *g2d;
1228         struct drm_exynos_g2d_exec *req = data;
1229         struct g2d_runqueue_node *runqueue_node;
1230         struct list_head *run_cmdlist;
1231         struct list_head *event_list;
1232
1233         if (!dev)
1234                 return -ENODEV;
1235
1236         g2d = dev_get_drvdata(dev);
1237         if (!g2d)
1238                 return -EFAULT;
1239
1240         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1241         if (!runqueue_node) {
1242                 dev_err(dev, "failed to allocate memory\n");
1243                 return -ENOMEM;
1244         }
1245         run_cmdlist = &runqueue_node->run_cmdlist;
1246         event_list = &runqueue_node->event_list;
1247         INIT_LIST_HEAD(run_cmdlist);
1248         INIT_LIST_HEAD(event_list);
1249         init_completion(&runqueue_node->complete);
1250         runqueue_node->async = req->async;
1251
1252         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1253         list_splice_init(&g2d_priv->event_list, event_list);
1254
1255         if (list_empty(run_cmdlist)) {
1256                 dev_err(dev, "there is no inuse cmdlist\n");
1257                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1258                 return -EPERM;
1259         }
1260
1261         mutex_lock(&g2d->runqueue_mutex);
1262         runqueue_node->pid = current->pid;
1263         runqueue_node->filp = file;
1264         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1265         if (!g2d->runqueue_node)
1266                 g2d_exec_runqueue(g2d);
1267         mutex_unlock(&g2d->runqueue_mutex);
1268
1269         if (runqueue_node->async)
1270                 goto out;
1271
1272         wait_for_completion(&runqueue_node->complete);
1273         g2d_free_runqueue_node(g2d, runqueue_node);
1274
1275 out:
1276         return 0;
1277 }
1278 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1279
1280 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1281 {
1282         struct g2d_data *g2d;
1283         int ret;
1284
1285         g2d = dev_get_drvdata(dev);
1286         if (!g2d)
1287                 return -EFAULT;
1288
1289         /* allocate dma-aware cmdlist buffer. */
1290         ret = g2d_init_cmdlist(g2d);
1291         if (ret < 0) {
1292                 dev_err(dev, "cmdlist init failed\n");
1293                 return ret;
1294         }
1295
1296         if (!is_drm_iommu_supported(drm_dev))
1297                 return 0;
1298
1299         ret = drm_iommu_attach_device(drm_dev, dev);
1300         if (ret < 0) {
1301                 dev_err(dev, "failed to enable iommu.\n");
1302                 g2d_fini_cmdlist(g2d);
1303         }
1304
1305         return ret;
1306
1307 }
1308
1309 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1310 {
1311         if (!is_drm_iommu_supported(drm_dev))
1312                 return;
1313
1314         drm_iommu_detach_device(drm_dev, dev);
1315 }
1316
1317 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1318                         struct drm_file *file)
1319 {
1320         struct drm_exynos_file_private *file_priv = file->driver_priv;
1321         struct exynos_drm_g2d_private *g2d_priv;
1322
1323         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1324         if (!g2d_priv)
1325                 return -ENOMEM;
1326
1327         g2d_priv->dev = dev;
1328         file_priv->g2d_priv = g2d_priv;
1329
1330         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1331         INIT_LIST_HEAD(&g2d_priv->event_list);
1332         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1333
1334         return 0;
1335 }
1336
1337 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1338                         struct drm_file *file)
1339 {
1340         struct drm_exynos_file_private *file_priv = file->driver_priv;
1341         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1342         struct g2d_data *g2d;
1343         struct g2d_cmdlist_node *node, *n;
1344
1345         if (!dev)
1346                 return;
1347
1348         g2d = dev_get_drvdata(dev);
1349         if (!g2d)
1350                 return;
1351
1352         mutex_lock(&g2d->cmdlist_mutex);
1353         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1354                 /*
1355                  * unmap all gem objects not completed.
1356                  *
1357                  * P.S. if current process was terminated forcely then
1358                  * there may be some commands in inuse_cmdlist so unmap
1359                  * them.
1360                  */
1361                 g2d_unmap_cmdlist_gem(g2d, node, file);
1362                 list_move_tail(&node->list, &g2d->free_cmdlist);
1363         }
1364         mutex_unlock(&g2d->cmdlist_mutex);
1365
1366         /* release all g2d_userptr in pool. */
1367         g2d_userptr_free_all(drm_dev, g2d, file);
1368
1369         kfree(file_priv->g2d_priv);
1370 }
1371
1372 static int g2d_probe(struct platform_device *pdev)
1373 {
1374         struct device *dev = &pdev->dev;
1375         struct resource *res;
1376         struct g2d_data *g2d;
1377         struct exynos_drm_subdrv *subdrv;
1378         int ret;
1379
1380         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1381         if (!g2d)
1382                 return -ENOMEM;
1383
1384         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1385                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1386         if (!g2d->runqueue_slab)
1387                 return -ENOMEM;
1388
1389         g2d->dev = dev;
1390
1391         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1392         if (!g2d->g2d_workq) {
1393                 dev_err(dev, "failed to create workqueue\n");
1394                 ret = -EINVAL;
1395                 goto err_destroy_slab;
1396         }
1397
1398         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1399         INIT_LIST_HEAD(&g2d->free_cmdlist);
1400         INIT_LIST_HEAD(&g2d->runqueue);
1401
1402         mutex_init(&g2d->cmdlist_mutex);
1403         mutex_init(&g2d->runqueue_mutex);
1404
1405         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1406         if (IS_ERR(g2d->gate_clk)) {
1407                 dev_err(dev, "failed to get gate clock\n");
1408                 ret = PTR_ERR(g2d->gate_clk);
1409                 goto err_destroy_workqueue;
1410         }
1411
1412         pm_runtime_enable(dev);
1413
1414         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1415
1416         g2d->regs = devm_ioremap_resource(dev, res);
1417         if (IS_ERR(g2d->regs)) {
1418                 ret = PTR_ERR(g2d->regs);
1419                 goto err_put_clk;
1420         }
1421
1422         g2d->irq = platform_get_irq(pdev, 0);
1423         if (g2d->irq < 0) {
1424                 dev_err(dev, "failed to get irq\n");
1425                 ret = g2d->irq;
1426                 goto err_put_clk;
1427         }
1428
1429         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1430                                                                 "drm_g2d", g2d);
1431         if (ret < 0) {
1432                 dev_err(dev, "irq request failed\n");
1433                 goto err_put_clk;
1434         }
1435
1436         g2d->max_pool = MAX_POOL;
1437
1438         platform_set_drvdata(pdev, g2d);
1439
1440         subdrv = &g2d->subdrv;
1441         subdrv->dev = dev;
1442         subdrv->probe = g2d_subdrv_probe;
1443         subdrv->remove = g2d_subdrv_remove;
1444         subdrv->open = g2d_open;
1445         subdrv->close = g2d_close;
1446
1447         ret = exynos_drm_subdrv_register(subdrv);
1448         if (ret < 0) {
1449                 dev_err(dev, "failed to register drm g2d device\n");
1450                 goto err_put_clk;
1451         }
1452
1453         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1454                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1455
1456         return 0;
1457
1458 err_put_clk:
1459         pm_runtime_disable(dev);
1460 err_destroy_workqueue:
1461         destroy_workqueue(g2d->g2d_workq);
1462 err_destroy_slab:
1463         kmem_cache_destroy(g2d->runqueue_slab);
1464         return ret;
1465 }
1466
1467 static int g2d_remove(struct platform_device *pdev)
1468 {
1469         struct g2d_data *g2d = platform_get_drvdata(pdev);
1470
1471         cancel_work_sync(&g2d->runqueue_work);
1472         exynos_drm_subdrv_unregister(&g2d->subdrv);
1473
1474         while (g2d->runqueue_node) {
1475                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1476                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1477         }
1478
1479         pm_runtime_disable(&pdev->dev);
1480
1481         g2d_fini_cmdlist(g2d);
1482         destroy_workqueue(g2d->g2d_workq);
1483         kmem_cache_destroy(g2d->runqueue_slab);
1484
1485         return 0;
1486 }
1487
1488 #ifdef CONFIG_PM_SLEEP
1489 static int g2d_suspend(struct device *dev)
1490 {
1491         struct g2d_data *g2d = dev_get_drvdata(dev);
1492
1493         mutex_lock(&g2d->runqueue_mutex);
1494         g2d->suspended = true;
1495         mutex_unlock(&g2d->runqueue_mutex);
1496
1497         while (g2d->runqueue_node)
1498                 /* FIXME: good range? */
1499                 usleep_range(500, 1000);
1500
1501         flush_work(&g2d->runqueue_work);
1502
1503         return 0;
1504 }
1505
1506 static int g2d_resume(struct device *dev)
1507 {
1508         struct g2d_data *g2d = dev_get_drvdata(dev);
1509
1510         g2d->suspended = false;
1511         g2d_exec_runqueue(g2d);
1512
1513         return 0;
1514 }
1515 #endif
1516
1517 #ifdef CONFIG_PM_RUNTIME
1518 static int g2d_runtime_suspend(struct device *dev)
1519 {
1520         struct g2d_data *g2d = dev_get_drvdata(dev);
1521
1522         clk_disable_unprepare(g2d->gate_clk);
1523
1524         return 0;
1525 }
1526
1527 static int g2d_runtime_resume(struct device *dev)
1528 {
1529         struct g2d_data *g2d = dev_get_drvdata(dev);
1530         int ret;
1531
1532         ret = clk_prepare_enable(g2d->gate_clk);
1533         if (ret < 0)
1534                 dev_warn(dev, "failed to enable clock.\n");
1535
1536         return ret;
1537 }
1538 #endif
1539
1540 static const struct dev_pm_ops g2d_pm_ops = {
1541         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1542         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1543 };
1544
1545 static const struct of_device_id exynos_g2d_match[] = {
1546         { .compatible = "samsung,exynos5250-g2d" },
1547         {},
1548 };
1549
1550 struct platform_driver g2d_driver = {
1551         .probe          = g2d_probe,
1552         .remove         = g2d_remove,
1553         .driver         = {
1554                 .name   = "s5p-g2d",
1555                 .owner  = THIS_MODULE,
1556                 .pm     = &g2d_pm_ops,
1557                 .of_match_table = exynos_g2d_match,
1558         },
1559 };