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         vma = find_vma(current->mm, userptr);
 471         if (!vma) {
 472                 DRM_ERROR("failed to get vm region.\n");
 473                 ret = -EFAULT;
 474                 goto err_free_pages;
 475         }
 476
 477         if (vma->vm_end < userptr + size) {
 478                 DRM_ERROR("vma is too small.\n");
 479                 ret = -EFAULT;
 480                 goto err_free_pages;
 481         }
 482
 483         g2d_userptr->vma = exynos_gem_get_vma(vma);
 484         if (!g2d_userptr->vma) {
 485                 DRM_ERROR("failed to copy vma.\n");
 486                 ret = -ENOMEM;
 487                 goto err_free_pages;
 488         }
 489
 490         g2d_userptr->size = size;
 491
 492         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
 493                                                 npages, pages, vma);
 494         if (ret < 0) {
 495                 DRM_ERROR("failed to get user pages from userptr.\n");
 496                 goto err_put_vma;
 497         }
 498
 499         g2d_userptr->pages = pages;
 500
 501         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 502         if (!sgt) {
 503                 ret = -ENOMEM;
 504                 goto err_free_userptr;
 505         }
 506
 507         ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
 508                                         size, GFP_KERNEL);
 509         if (ret < 0) {
 510                 DRM_ERROR("failed to get sgt from pages.\n");
 511                 goto err_free_sgt;
 512         }
 513
 514         g2d_userptr->sgt = sgt;
 515
 516         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 517                                                 DMA_BIDIRECTIONAL);
 518         if (ret < 0) {
 519                 DRM_ERROR("failed to map sgt with dma region.\n");
 520                 goto err_sg_free_table;
 521         }
 522
 523         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 524         g2d_userptr->userptr = userptr;
 525
 526         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 527
 528         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 529                 g2d->current_pool += npages << PAGE_SHIFT;
 530                 g2d_userptr->in_pool = true;
 531         }
 532
 533         *obj = (unsigned long)g2d_userptr;
 534
 535         return &g2d_userptr->dma_addr;
 536
 537 err_sg_free_table:
 538         sg_free_table(sgt);
 539
 540 err_free_sgt:
 541         kfree(sgt);
 542
 543 err_free_userptr:
 544         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 545                                         g2d_userptr->npages,
 546                                         g2d_userptr->vma);
 547
 548 err_put_vma:
 549         exynos_gem_put_vma(g2d_userptr->vma);
 550
 551 err_free_pages:
 552         drm_free_large(pages);
 553
 554 err_free:
 555         kfree(g2d_userptr);
 556
 557         return ERR_PTR(ret);
 558 }
 559
 560 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 561                                         struct g2d_data *g2d,
 562                                         struct drm_file *filp)
 563 {
 564         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 565         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 566         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 567
 568         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 569                 if (g2d_userptr->in_pool)
 570                         g2d_userptr_put_dma_addr(drm_dev,
 571                                                 (unsigned long)g2d_userptr,
 572                                                 true);
 573
 574         g2d->current_pool = 0;
 575 }
 576
 577 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 578 {
 579         enum g2d_reg_type reg_type;
 580
 581         switch (reg_offset) {
 582         case G2D_SRC_BASE_ADDR:
 583         case G2D_SRC_COLOR_MODE:
 584         case G2D_SRC_LEFT_TOP:
 585         case G2D_SRC_RIGHT_BOTTOM:
 586                 reg_type = REG_TYPE_SRC;
 587                 break;
 588         case G2D_SRC_PLANE2_BASE_ADDR:
 589                 reg_type = REG_TYPE_SRC_PLANE2;
 590                 break;
 591         case G2D_DST_BASE_ADDR:
 592         case G2D_DST_COLOR_MODE:
 593         case G2D_DST_LEFT_TOP:
 594         case G2D_DST_RIGHT_BOTTOM:
 595                 reg_type = REG_TYPE_DST;
 596                 break;
 597         case G2D_DST_PLANE2_BASE_ADDR:
 598                 reg_type = REG_TYPE_DST_PLANE2;
 599                 break;
 600         case G2D_PAT_BASE_ADDR:
 601                 reg_type = REG_TYPE_PAT;
 602                 break;
 603         case G2D_MSK_BASE_ADDR:
 604                 reg_type = REG_TYPE_MSK;
 605                 break;
 606         default:
 607                 reg_type = REG_TYPE_NONE;
 608                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 609                 break;
 610         }
 611
 612         return reg_type;
 613 }
 614
 615 static unsigned long g2d_get_buf_bpp(unsigned int format)
 616 {
 617         unsigned long bpp;
 618
 619         switch (format) {
 620         case G2D_FMT_XRGB8888:
 621         case G2D_FMT_ARGB8888:
 622                 bpp = 4;
 623                 break;
 624         case G2D_FMT_RGB565:
 625         case G2D_FMT_XRGB1555:
 626         case G2D_FMT_ARGB1555:
 627         case G2D_FMT_XRGB4444:
 628         case G2D_FMT_ARGB4444:
 629                 bpp = 2;
 630                 break;
 631         case G2D_FMT_PACKED_RGB888:
 632                 bpp = 3;
 633                 break;
 634         default:
 635                 bpp = 1;
 636                 break;
 637         }
 638
 639         return bpp;
 640 }
 641
 642 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 643                                                 enum g2d_reg_type reg_type,
 644                                                 unsigned long size)
 645 {
 646         unsigned int width, height;
 647         unsigned long area;
 648
 649         /*
 650          * check source and destination buffers only.
 651          * so the others are always valid.
 652          */
 653         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 654                 return true;
 655
 656         width = buf_desc->right_x - buf_desc->left_x;
 657         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 658                 DRM_ERROR("width[%u] is out of range!\n", width);
 659                 return false;
 660         }
 661
 662         height = buf_desc->bottom_y - buf_desc->top_y;
 663         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 664                 DRM_ERROR("height[%u] is out of range!\n", height);
 665                 return false;
 666         }
 667
 668         area = (unsigned long)width * (unsigned long)height *
 669                                         g2d_get_buf_bpp(buf_desc->format);
 670         if (area > size) {
 671                 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
 672                 return false;
 673         }
 674
 675         return true;
 676 }
 677
 678 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 679                                 struct g2d_cmdlist_node *node,
 680                                 struct drm_device *drm_dev,
 681                                 struct drm_file *file)
 682 {
 683         struct g2d_cmdlist *cmdlist = node->cmdlist;
 684         struct g2d_buf_info *buf_info = &node->buf_info;
 685         int offset;
 686         int ret;
 687         int i;
 688
 689         for (i = 0; i < buf_info->map_nr; i++) {
 690                 struct g2d_buf_desc *buf_desc;
 691                 enum g2d_reg_type reg_type;
 692                 int reg_pos;
 693                 unsigned long handle;
 694                 dma_addr_t *addr;
 695
 696                 reg_pos = cmdlist->last - 2 * (i + 1);
 697
 698                 offset = cmdlist->data[reg_pos];
 699                 handle = cmdlist->data[reg_pos + 1];
 700
 701                 reg_type = g2d_get_reg_type(offset);
 702                 if (reg_type == REG_TYPE_NONE) {
 703                         ret = -EFAULT;
 704                         goto err;
 705                 }
 706
 707                 buf_desc = &buf_info->descs[reg_type];
 708
 709                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 710                         unsigned long size;
 711
 712                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 713                         if (!size) {
 714                                 ret = -EFAULT;
 715                                 goto err;
 716                         }
 717
 718                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 719                                                                         size)) {
 720                                 ret = -EFAULT;
 721                                 goto err;
 722                         }
 723
 724                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 725                                                                 file);
 726                         if (IS_ERR(addr)) {
 727                                 ret = -EFAULT;
 728                                 goto err;
 729                         }
 730                 } else {
 731                         struct drm_exynos_g2d_userptr g2d_userptr;
 732
 733                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 734                                 sizeof(struct drm_exynos_g2d_userptr))) {
 735                                 ret = -EFAULT;
 736                                 goto err;
 737                         }
 738
 739                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 740                                                         g2d_userptr.size)) {
 741                                 ret = -EFAULT;
 742                                 goto err;
 743                         }
 744
 745                         addr = g2d_userptr_get_dma_addr(drm_dev,
 746                                                         g2d_userptr.userptr,
 747                                                         g2d_userptr.size,
 748                                                         file,
 749                                                         &handle);
 750                         if (IS_ERR(addr)) {
 751                                 ret = -EFAULT;
 752                                 goto err;
 753                         }
 754                 }
 755
 756                 cmdlist->data[reg_pos + 1] = *addr;
 757                 buf_info->reg_types[i] = reg_type;
 758                 buf_info->handles[reg_type] = handle;
 759         }
 760
 761         return 0;
 762
 763 err:
 764         buf_info->map_nr = i;
 765         return ret;
 766 }
 767
 768 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 769                                   struct g2d_cmdlist_node *node,
 770                                   struct drm_file *filp)
 771 {
 772         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 773         struct g2d_buf_info *buf_info = &node->buf_info;
 774         int i;
 775
 776         for (i = 0; i < buf_info->map_nr; i++) {
 777                 struct g2d_buf_desc *buf_desc;
 778                 enum g2d_reg_type reg_type;
 779                 unsigned long handle;
 780
 781                 reg_type = buf_info->reg_types[i];
 782
 783                 buf_desc = &buf_info->descs[reg_type];
 784                 handle = buf_info->handles[reg_type];
 785
 786                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 787                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 788                                                         filp);
 789                 else
 790                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 791                                                         false);
 792
 793                 buf_info->reg_types[i] = REG_TYPE_NONE;
 794                 buf_info->handles[reg_type] = 0;
 795                 buf_info->types[reg_type] = 0;
 796                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 797         }
 798
 799         buf_info->map_nr = 0;
 800 }
 801
 802 static void g2d_dma_start(struct g2d_data *g2d,
 803                           struct g2d_runqueue_node *runqueue_node)
 804 {
 805         struct g2d_cmdlist_node *node =
 806                                 list_first_entry(&runqueue_node->run_cmdlist,
 807                                                 struct g2d_cmdlist_node, list);
 808         int ret;
 809
 810         ret = pm_runtime_get_sync(g2d->dev);
 811         if (ret < 0)
 812                 return;
 813
 814         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 815         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 816 }
 817
 818 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 819 {
 820         struct g2d_runqueue_node *runqueue_node;
 821
 822         if (list_empty(&g2d->runqueue))
 823                 return NULL;
 824
 825         runqueue_node = list_first_entry(&g2d->runqueue,
 826                                          struct g2d_runqueue_node, list);
 827         list_del_init(&runqueue_node->list);
 828         return runqueue_node;
 829 }
 830
 831 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 832                                    struct g2d_runqueue_node *runqueue_node)
 833 {
 834         struct g2d_cmdlist_node *node;
 835
 836         if (!runqueue_node)
 837                 return;
 838
 839         mutex_lock(&g2d->cmdlist_mutex);
 840         /*
 841          * commands in run_cmdlist have been completed so unmap all gem
 842          * objects in each command node so that they are unreferenced.
 843          */
 844         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 845                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 846         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 847         mutex_unlock(&g2d->cmdlist_mutex);
 848
 849         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 850 }
 851
 852 static void g2d_exec_runqueue(struct g2d_data *g2d)
 853 {
 854         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 855         if (g2d->runqueue_node)
 856                 g2d_dma_start(g2d, g2d->runqueue_node);
 857 }
 858
 859 static void g2d_runqueue_worker(struct work_struct *work)
 860 {
 861         struct g2d_data *g2d = container_of(work, struct g2d_data,
 862                                             runqueue_work);
 863
 864         mutex_lock(&g2d->runqueue_mutex);
 865         pm_runtime_put_sync(g2d->dev);
 866
 867         complete(&g2d->runqueue_node->complete);
 868         if (g2d->runqueue_node->async)
 869                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 870
 871         if (g2d->suspended)
 872                 g2d->runqueue_node = NULL;
 873         else
 874                 g2d_exec_runqueue(g2d);
 875         mutex_unlock(&g2d->runqueue_mutex);
 876 }
 877
 878 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 879 {
 880         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 881         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 882         struct drm_exynos_pending_g2d_event *e;
 883         struct timeval now;
 884         unsigned long flags;
 885
 886         if (list_empty(&runqueue_node->event_list))
 887                 return;
 888
 889         e = list_first_entry(&runqueue_node->event_list,
 890                              struct drm_exynos_pending_g2d_event, base.link);
 891
 892         do_gettimeofday(&now);
 893         e->event.tv_sec = now.tv_sec;
 894         e->event.tv_usec = now.tv_usec;
 895         e->event.cmdlist_no = cmdlist_no;
 896
 897         spin_lock_irqsave(&drm_dev->event_lock, flags);
 898         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 899         wake_up_interruptible(&e->base.file_priv->event_wait);
 900         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 901 }
 902
 903 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 904 {
 905         struct g2d_data *g2d = dev_id;
 906         u32 pending;
 907
 908         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 909         if (pending)
 910                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 911
 912         if (pending & G2D_INTP_GCMD_FIN) {
 913                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 914
 915                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 916                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 917
 918                 g2d_finish_event(g2d, cmdlist_no);
 919
 920                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 921                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 922                         writel_relaxed(G2D_DMA_CONTINUE,
 923                                         g2d->regs + G2D_DMA_COMMAND);
 924                 }
 925         }
 926
 927         if (pending & G2D_INTP_ACMD_FIN)
 928                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 929
 930         return IRQ_HANDLED;
 931 }
 932
 933 static int g2d_check_reg_offset(struct device *dev,
 934                                 struct g2d_cmdlist_node *node,
 935                                 int nr, bool for_addr)
 936 {
 937         struct g2d_cmdlist *cmdlist = node->cmdlist;
 938         int reg_offset;
 939         int index;
 940         int i;
 941
 942         for (i = 0; i < nr; i++) {
 943                 struct g2d_buf_info *buf_info = &node->buf_info;
 944                 struct g2d_buf_desc *buf_desc;
 945                 enum g2d_reg_type reg_type;
 946                 unsigned long value;
 947
 948                 index = cmdlist->last - 2 * (i + 1);
 949
 950                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 951                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 952                         goto err;
 953                 if (reg_offset % 4)
 954                         goto err;
 955
 956                 switch (reg_offset) {
 957                 case G2D_SRC_BASE_ADDR:
 958                 case G2D_SRC_PLANE2_BASE_ADDR:
 959                 case G2D_DST_BASE_ADDR:
 960                 case G2D_DST_PLANE2_BASE_ADDR:
 961                 case G2D_PAT_BASE_ADDR:
 962                 case G2D_MSK_BASE_ADDR:
 963                         if (!for_addr)
 964                                 goto err;
 965
 966                         reg_type = g2d_get_reg_type(reg_offset);
 967                         if (reg_type == REG_TYPE_NONE)
 968                                 goto err;
 969
 970                         /* check userptr buffer type. */
 971                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 972                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 973                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 974                         } else
 975                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 976                         break;
 977                 case G2D_SRC_COLOR_MODE:
 978                 case G2D_DST_COLOR_MODE:
 979                         if (for_addr)
 980                                 goto err;
 981
 982                         reg_type = g2d_get_reg_type(reg_offset);
 983                         if (reg_type == REG_TYPE_NONE)
 984                                 goto err;
 985
 986                         buf_desc = &buf_info->descs[reg_type];
 987                         value = cmdlist->data[index + 1];
 988
 989                         buf_desc->format = value & 0xf;
 990                         break;
 991                 case G2D_SRC_LEFT_TOP:
 992                 case G2D_DST_LEFT_TOP:
 993                         if (for_addr)
 994                                 goto err;
 995
 996                         reg_type = g2d_get_reg_type(reg_offset);
 997                         if (reg_type == REG_TYPE_NONE)
 998                                 goto err;
 999
1000                         buf_desc = &buf_info->descs[reg_type];
1001                         value = cmdlist->data[index + 1];
1002
1003                         buf_desc->left_x = value & 0x1fff;
1004                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1005                         break;
1006                 case G2D_SRC_RIGHT_BOTTOM:
1007                 case G2D_DST_RIGHT_BOTTOM:
1008                         if (for_addr)
1009                                 goto err;
1010
1011                         reg_type = g2d_get_reg_type(reg_offset);
1012                         if (reg_type == REG_TYPE_NONE)
1013                                 goto err;
1014
1015                         buf_desc = &buf_info->descs[reg_type];
1016                         value = cmdlist->data[index + 1];
1017
1018                         buf_desc->right_x = value & 0x1fff;
1019                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1020                         break;
1021                 default:
1022                         if (for_addr)
1023                                 goto err;
1024                         break;
1025                 }
1026         }
1027
1028         return 0;
1029
1030 err:
1031         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1032         return -EINVAL;
1033 }
1034
1035 /* ioctl functions */
1036 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1037                              struct drm_file *file)
1038 {
1039         struct drm_exynos_g2d_get_ver *ver = data;
1040
1041         ver->major = G2D_HW_MAJOR_VER;
1042         ver->minor = G2D_HW_MINOR_VER;
1043
1044         return 0;
1045 }
1046 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1047
1048 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1049                                  struct drm_file *file)
1050 {
1051         struct drm_exynos_file_private *file_priv = file->driver_priv;
1052         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1053         struct device *dev = g2d_priv->dev;
1054         struct g2d_data *g2d;
1055         struct drm_exynos_g2d_set_cmdlist *req = data;
1056         struct drm_exynos_g2d_cmd *cmd;
1057         struct drm_exynos_pending_g2d_event *e;
1058         struct g2d_cmdlist_node *node;
1059         struct g2d_cmdlist *cmdlist;
1060         unsigned long flags;
1061         int size;
1062         int ret;
1063
1064         if (!dev)
1065                 return -ENODEV;
1066
1067         g2d = dev_get_drvdata(dev);
1068         if (!g2d)
1069                 return -EFAULT;
1070
1071         node = g2d_get_cmdlist(g2d);
1072         if (!node)
1073                 return -ENOMEM;
1074
1075         node->event = NULL;
1076
1077         if (req->event_type != G2D_EVENT_NOT) {
1078                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1079                 if (file->event_space < sizeof(e->event)) {
1080                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1081                         ret = -ENOMEM;
1082                         goto err;
1083                 }
1084                 file->event_space -= sizeof(e->event);
1085                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1086
1087                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1088                 if (!e) {
1089                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1090                         file->event_space += sizeof(e->event);
1091                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1092
1093                         ret = -ENOMEM;
1094                         goto err;
1095                 }
1096
1097                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1098                 e->event.base.length = sizeof(e->event);
1099                 e->event.user_data = req->user_data;
1100                 e->base.event = &e->event.base;
1101                 e->base.file_priv = file;
1102                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1103
1104                 node->event = e;
1105         }
1106
1107         cmdlist = node->cmdlist;
1108
1109         cmdlist->last = 0;
1110
1111         /*
1112          * If don't clear SFR registers, the cmdlist is affected by register
1113          * values of previous cmdlist. G2D hw executes SFR clear command and
1114          * a next command at the same time then the next command is ignored and
1115          * is executed rightly from next next command, so needs a dummy command
1116          * to next command of SFR clear command.
1117          */
1118         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1119         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1120         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1121         cmdlist->data[cmdlist->last++] = 0;
1122
1123         /*
1124          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1125          * and GCF bit should be set to INTEN register if user wants
1126          * G2D interrupt event once current command list execution is
1127          * finished.
1128          * Otherwise only ACF bit should be set to INTEN register so
1129          * that one interrupt is occurred after all command lists
1130          * have been completed.
1131          */
1132         if (node->event) {
1133                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1134                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1135                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1136                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1137         } else {
1138                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1139                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1140         }
1141
1142         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1143         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1144         if (size > G2D_CMDLIST_DATA_NUM) {
1145                 dev_err(dev, "cmdlist size is too big\n");
1146                 ret = -EINVAL;
1147                 goto err_free_event;
1148         }
1149
1150         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1151
1152         if (copy_from_user(cmdlist->data + cmdlist->last,
1153                                 (void __user *)cmd,
1154                                 sizeof(*cmd) * req->cmd_nr)) {
1155                 ret = -EFAULT;
1156                 goto err_free_event;
1157         }
1158         cmdlist->last += req->cmd_nr * 2;
1159
1160         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1161         if (ret < 0)
1162                 goto err_free_event;
1163
1164         node->buf_info.map_nr = req->cmd_buf_nr;
1165         if (req->cmd_buf_nr) {
1166                 struct drm_exynos_g2d_cmd *cmd_buf;
1167
1168                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1169
1170                 if (copy_from_user(cmdlist->data + cmdlist->last,
1171                                         (void __user *)cmd_buf,
1172                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1173                         ret = -EFAULT;
1174                         goto err_free_event;
1175                 }
1176                 cmdlist->last += req->cmd_buf_nr * 2;
1177
1178                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1179                 if (ret < 0)
1180                         goto err_free_event;
1181
1182                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1183                 if (ret < 0)
1184                         goto err_unmap;
1185         }
1186
1187         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1188         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1189
1190         /* head */
1191         cmdlist->head = cmdlist->last / 2;
1192
1193         /* tail */
1194         cmdlist->data[cmdlist->last] = 0;
1195
1196         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1197
1198         return 0;
1199
1200 err_unmap:
1201         g2d_unmap_cmdlist_gem(g2d, node, file);
1202 err_free_event:
1203         if (node->event) {
1204                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1205                 file->event_space += sizeof(e->event);
1206                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1207                 kfree(node->event);
1208         }
1209 err:
1210         g2d_put_cmdlist(g2d, node);
1211         return ret;
1212 }
1213 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1214
1215 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1216                           struct drm_file *file)
1217 {
1218         struct drm_exynos_file_private *file_priv = file->driver_priv;
1219         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1220         struct device *dev = g2d_priv->dev;
1221         struct g2d_data *g2d;
1222         struct drm_exynos_g2d_exec *req = data;
1223         struct g2d_runqueue_node *runqueue_node;
1224         struct list_head *run_cmdlist;
1225         struct list_head *event_list;
1226
1227         if (!dev)
1228                 return -ENODEV;
1229
1230         g2d = dev_get_drvdata(dev);
1231         if (!g2d)
1232                 return -EFAULT;
1233
1234         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1235         if (!runqueue_node) {
1236                 dev_err(dev, "failed to allocate memory\n");
1237                 return -ENOMEM;
1238         }
1239         run_cmdlist = &runqueue_node->run_cmdlist;
1240         event_list = &runqueue_node->event_list;
1241         INIT_LIST_HEAD(run_cmdlist);
1242         INIT_LIST_HEAD(event_list);
1243         init_completion(&runqueue_node->complete);
1244         runqueue_node->async = req->async;
1245
1246         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1247         list_splice_init(&g2d_priv->event_list, event_list);
1248
1249         if (list_empty(run_cmdlist)) {
1250                 dev_err(dev, "there is no inuse cmdlist\n");
1251                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1252                 return -EPERM;
1253         }
1254
1255         mutex_lock(&g2d->runqueue_mutex);
1256         runqueue_node->pid = current->pid;
1257         runqueue_node->filp = file;
1258         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1259         if (!g2d->runqueue_node)
1260                 g2d_exec_runqueue(g2d);
1261         mutex_unlock(&g2d->runqueue_mutex);
1262
1263         if (runqueue_node->async)
1264                 goto out;
1265
1266         wait_for_completion(&runqueue_node->complete);
1267         g2d_free_runqueue_node(g2d, runqueue_node);
1268
1269 out:
1270         return 0;
1271 }
1272 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1273
1274 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1275 {
1276         struct g2d_data *g2d;
1277         int ret;
1278
1279         g2d = dev_get_drvdata(dev);
1280         if (!g2d)
1281                 return -EFAULT;
1282
1283         /* allocate dma-aware cmdlist buffer. */
1284         ret = g2d_init_cmdlist(g2d);
1285         if (ret < 0) {
1286                 dev_err(dev, "cmdlist init failed\n");
1287                 return ret;
1288         }
1289
1290         if (!is_drm_iommu_supported(drm_dev))
1291                 return 0;
1292
1293         ret = drm_iommu_attach_device(drm_dev, dev);
1294         if (ret < 0) {
1295                 dev_err(dev, "failed to enable iommu.\n");
1296                 g2d_fini_cmdlist(g2d);
1297         }
1298
1299         return ret;
1300
1301 }
1302
1303 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1304 {
1305         if (!is_drm_iommu_supported(drm_dev))
1306                 return;
1307
1308         drm_iommu_detach_device(drm_dev, dev);
1309 }
1310
1311 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1312                         struct drm_file *file)
1313 {
1314         struct drm_exynos_file_private *file_priv = file->driver_priv;
1315         struct exynos_drm_g2d_private *g2d_priv;
1316
1317         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1318         if (!g2d_priv)
1319                 return -ENOMEM;
1320
1321         g2d_priv->dev = dev;
1322         file_priv->g2d_priv = g2d_priv;
1323
1324         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1325         INIT_LIST_HEAD(&g2d_priv->event_list);
1326         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1327
1328         return 0;
1329 }
1330
1331 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1332                         struct drm_file *file)
1333 {
1334         struct drm_exynos_file_private *file_priv = file->driver_priv;
1335         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1336         struct g2d_data *g2d;
1337         struct g2d_cmdlist_node *node, *n;
1338
1339         if (!dev)
1340                 return;
1341
1342         g2d = dev_get_drvdata(dev);
1343         if (!g2d)
1344                 return;
1345
1346         mutex_lock(&g2d->cmdlist_mutex);
1347         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1348                 /*
1349                  * unmap all gem objects not completed.
1350                  *
1351                  * P.S. if current process was terminated forcely then
1352                  * there may be some commands in inuse_cmdlist so unmap
1353                  * them.
1354                  */
1355                 g2d_unmap_cmdlist_gem(g2d, node, file);
1356                 list_move_tail(&node->list, &g2d->free_cmdlist);
1357         }
1358         mutex_unlock(&g2d->cmdlist_mutex);
1359
1360         /* release all g2d_userptr in pool. */
1361         g2d_userptr_free_all(drm_dev, g2d, file);
1362
1363         kfree(file_priv->g2d_priv);
1364 }
1365
1366 static int g2d_probe(struct platform_device *pdev)
1367 {
1368         struct device *dev = &pdev->dev;
1369         struct resource *res;
1370         struct g2d_data *g2d;
1371         struct exynos_drm_subdrv *subdrv;
1372         int ret;
1373
1374         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1375         if (!g2d)
1376                 return -ENOMEM;
1377
1378         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1379                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1380         if (!g2d->runqueue_slab)
1381                 return -ENOMEM;
1382
1383         g2d->dev = dev;
1384
1385         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1386         if (!g2d->g2d_workq) {
1387                 dev_err(dev, "failed to create workqueue\n");
1388                 ret = -EINVAL;
1389                 goto err_destroy_slab;
1390         }
1391
1392         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1393         INIT_LIST_HEAD(&g2d->free_cmdlist);
1394         INIT_LIST_HEAD(&g2d->runqueue);
1395
1396         mutex_init(&g2d->cmdlist_mutex);
1397         mutex_init(&g2d->runqueue_mutex);
1398
1399         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1400         if (IS_ERR(g2d->gate_clk)) {
1401                 dev_err(dev, "failed to get gate clock\n");
1402                 ret = PTR_ERR(g2d->gate_clk);
1403                 goto err_destroy_workqueue;
1404         }
1405
1406         pm_runtime_enable(dev);
1407
1408         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1409
1410         g2d->regs = devm_ioremap_resource(dev, res);
1411         if (IS_ERR(g2d->regs)) {
1412                 ret = PTR_ERR(g2d->regs);
1413                 goto err_put_clk;
1414         }
1415
1416         g2d->irq = platform_get_irq(pdev, 0);
1417         if (g2d->irq < 0) {
1418                 dev_err(dev, "failed to get irq\n");
1419                 ret = g2d->irq;
1420                 goto err_put_clk;
1421         }
1422
1423         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1424                                                                 "drm_g2d", g2d);
1425         if (ret < 0) {
1426                 dev_err(dev, "irq request failed\n");
1427                 goto err_put_clk;
1428         }
1429
1430         g2d->max_pool = MAX_POOL;
1431
1432         platform_set_drvdata(pdev, g2d);
1433
1434         subdrv = &g2d->subdrv;
1435         subdrv->dev = dev;
1436         subdrv->probe = g2d_subdrv_probe;
1437         subdrv->remove = g2d_subdrv_remove;
1438         subdrv->open = g2d_open;
1439         subdrv->close = g2d_close;
1440
1441         ret = exynos_drm_subdrv_register(subdrv);
1442         if (ret < 0) {
1443                 dev_err(dev, "failed to register drm g2d device\n");
1444                 goto err_put_clk;
1445         }
1446
1447         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1448                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1449
1450         return 0;
1451
1452 err_put_clk:
1453         pm_runtime_disable(dev);
1454 err_destroy_workqueue:
1455         destroy_workqueue(g2d->g2d_workq);
1456 err_destroy_slab:
1457         kmem_cache_destroy(g2d->runqueue_slab);
1458         return ret;
1459 }
1460
1461 static int g2d_remove(struct platform_device *pdev)
1462 {
1463         struct g2d_data *g2d = platform_get_drvdata(pdev);
1464
1465         cancel_work_sync(&g2d->runqueue_work);
1466         exynos_drm_subdrv_unregister(&g2d->subdrv);
1467
1468         while (g2d->runqueue_node) {
1469                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1470                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1471         }
1472
1473         pm_runtime_disable(&pdev->dev);
1474
1475         g2d_fini_cmdlist(g2d);
1476         destroy_workqueue(g2d->g2d_workq);
1477         kmem_cache_destroy(g2d->runqueue_slab);
1478
1479         return 0;
1480 }
1481
1482 #ifdef CONFIG_PM_SLEEP
1483 static int g2d_suspend(struct device *dev)
1484 {
1485         struct g2d_data *g2d = dev_get_drvdata(dev);
1486
1487         mutex_lock(&g2d->runqueue_mutex);
1488         g2d->suspended = true;
1489         mutex_unlock(&g2d->runqueue_mutex);
1490
1491         while (g2d->runqueue_node)
1492                 /* FIXME: good range? */
1493                 usleep_range(500, 1000);
1494
1495         flush_work(&g2d->runqueue_work);
1496
1497         return 0;
1498 }
1499
1500 static int g2d_resume(struct device *dev)
1501 {
1502         struct g2d_data *g2d = dev_get_drvdata(dev);
1503
1504         g2d->suspended = false;
1505         g2d_exec_runqueue(g2d);
1506
1507         return 0;
1508 }
1509 #endif
1510
1511 #ifdef CONFIG_PM_RUNTIME
1512 static int g2d_runtime_suspend(struct device *dev)
1513 {
1514         struct g2d_data *g2d = dev_get_drvdata(dev);
1515
1516         clk_disable_unprepare(g2d->gate_clk);
1517
1518         return 0;
1519 }
1520
1521 static int g2d_runtime_resume(struct device *dev)
1522 {
1523         struct g2d_data *g2d = dev_get_drvdata(dev);
1524         int ret;
1525
1526         ret = clk_prepare_enable(g2d->gate_clk);
1527         if (ret < 0)
1528                 dev_warn(dev, "failed to enable clock.\n");
1529
1530         return ret;
1531 }
1532 #endif
1533
1534 static const struct dev_pm_ops g2d_pm_ops = {
1535         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1536         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1537 };
1538
1539 static const struct of_device_id exynos_g2d_match[] = {
1540         { .compatible = "samsung,exynos5250-g2d" },
1541         {},
1542 };
1543
1544 struct platform_driver g2d_driver = {
1545         .probe          = g2d_probe,
1546         .remove         = g2d_remove,
1547         .driver         = {
1548                 .name   = "s5p-g2d",
1549                 .owner  = THIS_MODULE,
1550                 .pm     = &g2d_pm_ops,
1551                 .of_match_table = exynos_g2d_match,
1552         },
1553 };