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         if (!g2d_userptr->out_of_list)
 387                 list_del_init(&g2d_userptr->list);
 388
 389         sg_free_table(g2d_userptr->sgt);
 390         kfree(g2d_userptr->sgt);
 391
 392         drm_free_large(g2d_userptr->pages);
 393         kfree(g2d_userptr);
 394 }
 395
 396 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 397                                         unsigned long userptr,
 398                                         unsigned long size,
 399                                         struct drm_file *filp,
 400                                         unsigned long *obj)
 401 {
 402         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 403         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 404         struct g2d_cmdlist_userptr *g2d_userptr;
 405         struct g2d_data *g2d;
 406         struct page **pages;
 407         struct sg_table *sgt;
 408         struct vm_area_struct *vma;
 409         unsigned long start, end;
 410         unsigned int npages, offset;
 411         int ret;
 412
 413         if (!size) {
 414                 DRM_ERROR("invalid userptr size.\n");
 415                 return ERR_PTR(-EINVAL);
 416         }
 417
 418         g2d = dev_get_drvdata(g2d_priv->dev);
 419
 420         /* check if userptr already exists in userptr_list. */
 421         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 422                 if (g2d_userptr->userptr == userptr) {
 423                         /*
 424                          * also check size because there could be same address
 425                          * and different size.
 426                          */
 427                         if (g2d_userptr->size == size) {
 428                                 atomic_inc(&g2d_userptr->refcount);
 429                                 *obj = (unsigned long)g2d_userptr;
 430
 431                                 return &g2d_userptr->dma_addr;
 432                         }
 433
 434                         /*
 435                          * at this moment, maybe g2d dma is accessing this
 436                          * g2d_userptr memory region so just remove this
 437                          * g2d_userptr object from userptr_list not to be
 438                          * referred again and also except it the userptr
 439                          * pool to be released after the dma access completion.
 440                          */
 441                         g2d_userptr->out_of_list = true;
 442                         g2d_userptr->in_pool = false;
 443                         list_del_init(&g2d_userptr->list);
 444
 445                         break;
 446                 }
 447         }
 448
 449         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 450         if (!g2d_userptr)
 451                 return ERR_PTR(-ENOMEM);
 452
 453         atomic_set(&g2d_userptr->refcount, 1);
 454
 455         start = userptr & PAGE_MASK;
 456         offset = userptr & ~PAGE_MASK;
 457         end = PAGE_ALIGN(userptr + size);
 458         npages = (end - start) >> PAGE_SHIFT;
 459         g2d_userptr->npages = npages;
 460
 461         pages = drm_calloc_large(npages, sizeof(struct page *));
 462         if (!pages) {
 463                 DRM_ERROR("failed to allocate pages.\n");
 464                 ret = -ENOMEM;
 465                 goto err_free;
 466         }
 467
 468         vma = find_vma(current->mm, userptr);
 469         if (!vma) {
 470                 DRM_ERROR("failed to get vm region.\n");
 471                 ret = -EFAULT;
 472                 goto err_free_pages;
 473         }
 474
 475         if (vma->vm_end < userptr + size) {
 476                 DRM_ERROR("vma is too small.\n");
 477                 ret = -EFAULT;
 478                 goto err_free_pages;
 479         }
 480
 481         g2d_userptr->vma = exynos_gem_get_vma(vma);
 482         if (!g2d_userptr->vma) {
 483                 DRM_ERROR("failed to copy vma.\n");
 484                 ret = -ENOMEM;
 485                 goto err_free_pages;
 486         }
 487
 488         g2d_userptr->size = size;
 489
 490         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
 491                                                 npages, pages, vma);
 492         if (ret < 0) {
 493                 DRM_ERROR("failed to get user pages from userptr.\n");
 494                 goto err_put_vma;
 495         }
 496
 497         g2d_userptr->pages = pages;
 498
 499         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 500         if (!sgt) {
 501                 ret = -ENOMEM;
 502                 goto err_free_userptr;
 503         }
 504
 505         ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
 506                                         size, GFP_KERNEL);
 507         if (ret < 0) {
 508                 DRM_ERROR("failed to get sgt from pages.\n");
 509                 goto err_free_sgt;
 510         }
 511
 512         g2d_userptr->sgt = sgt;
 513
 514         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 515                                                 DMA_BIDIRECTIONAL);
 516         if (ret < 0) {
 517                 DRM_ERROR("failed to map sgt with dma region.\n");
 518                 goto err_sg_free_table;
 519         }
 520
 521         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 522         g2d_userptr->userptr = userptr;
 523
 524         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 525
 526         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 527                 g2d->current_pool += npages << PAGE_SHIFT;
 528                 g2d_userptr->in_pool = true;
 529         }
 530
 531         *obj = (unsigned long)g2d_userptr;
 532
 533         return &g2d_userptr->dma_addr;
 534
 535 err_sg_free_table:
 536         sg_free_table(sgt);
 537
 538 err_free_sgt:
 539         kfree(sgt);
 540
 541 err_free_userptr:
 542         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 543                                         g2d_userptr->npages,
 544                                         g2d_userptr->vma);
 545
 546 err_put_vma:
 547         exynos_gem_put_vma(g2d_userptr->vma);
 548
 549 err_free_pages:
 550         drm_free_large(pages);
 551
 552 err_free:
 553         kfree(g2d_userptr);
 554
 555         return ERR_PTR(ret);
 556 }
 557
 558 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 559                                         struct g2d_data *g2d,
 560                                         struct drm_file *filp)
 561 {
 562         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 563         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 564         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 565
 566         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 567                 if (g2d_userptr->in_pool)
 568                         g2d_userptr_put_dma_addr(drm_dev,
 569                                                 (unsigned long)g2d_userptr,
 570                                                 true);
 571
 572         g2d->current_pool = 0;
 573 }
 574
 575 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 576 {
 577         enum g2d_reg_type reg_type;
 578
 579         switch (reg_offset) {
 580         case G2D_SRC_BASE_ADDR:
 581         case G2D_SRC_COLOR_MODE:
 582         case G2D_SRC_LEFT_TOP:
 583         case G2D_SRC_RIGHT_BOTTOM:
 584                 reg_type = REG_TYPE_SRC;
 585                 break;
 586         case G2D_SRC_PLANE2_BASE_ADDR:
 587                 reg_type = REG_TYPE_SRC_PLANE2;
 588                 break;
 589         case G2D_DST_BASE_ADDR:
 590         case G2D_DST_COLOR_MODE:
 591         case G2D_DST_LEFT_TOP:
 592         case G2D_DST_RIGHT_BOTTOM:
 593                 reg_type = REG_TYPE_DST;
 594                 break;
 595         case G2D_DST_PLANE2_BASE_ADDR:
 596                 reg_type = REG_TYPE_DST_PLANE2;
 597                 break;
 598         case G2D_PAT_BASE_ADDR:
 599                 reg_type = REG_TYPE_PAT;
 600                 break;
 601         case G2D_MSK_BASE_ADDR:
 602                 reg_type = REG_TYPE_MSK;
 603                 break;
 604         default:
 605                 reg_type = REG_TYPE_NONE;
 606                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 607                 break;
 608         };
 609
 610         return reg_type;
 611 }
 612
 613 static unsigned long g2d_get_buf_bpp(unsigned int format)
 614 {
 615         unsigned long bpp;
 616
 617         switch (format) {
 618         case G2D_FMT_XRGB8888:
 619         case G2D_FMT_ARGB8888:
 620                 bpp = 4;
 621                 break;
 622         case G2D_FMT_RGB565:
 623         case G2D_FMT_XRGB1555:
 624         case G2D_FMT_ARGB1555:
 625         case G2D_FMT_XRGB4444:
 626         case G2D_FMT_ARGB4444:
 627                 bpp = 2;
 628                 break;
 629         case G2D_FMT_PACKED_RGB888:
 630                 bpp = 3;
 631                 break;
 632         default:
 633                 bpp = 1;
 634                 break;
 635         }
 636
 637         return bpp;
 638 }
 639
 640 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 641                                                 enum g2d_reg_type reg_type,
 642                                                 unsigned long size)
 643 {
 644         unsigned int width, height;
 645         unsigned long area;
 646
 647         /*
 648          * check source and destination buffers only.
 649          * so the others are always valid.
 650          */
 651         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 652                 return true;
 653
 654         width = buf_desc->right_x - buf_desc->left_x;
 655         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 656                 DRM_ERROR("width[%u] is out of range!\n", width);
 657                 return false;
 658         }
 659
 660         height = buf_desc->bottom_y - buf_desc->top_y;
 661         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 662                 DRM_ERROR("height[%u] is out of range!\n", height);
 663                 return false;
 664         }
 665
 666         area = (unsigned long)width * (unsigned long)height *
 667                                         g2d_get_buf_bpp(buf_desc->format);
 668         if (area > size) {
 669                 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
 670                 return false;
 671         }
 672
 673         return true;
 674 }
 675
 676 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 677                                 struct g2d_cmdlist_node *node,
 678                                 struct drm_device *drm_dev,
 679                                 struct drm_file *file)
 680 {
 681         struct g2d_cmdlist *cmdlist = node->cmdlist;
 682         struct g2d_buf_info *buf_info = &node->buf_info;
 683         int offset;
 684         int ret;
 685         int i;
 686
 687         for (i = 0; i < buf_info->map_nr; i++) {
 688                 struct g2d_buf_desc *buf_desc;
 689                 enum g2d_reg_type reg_type;
 690                 int reg_pos;
 691                 unsigned long handle;
 692                 dma_addr_t *addr;
 693
 694                 reg_pos = cmdlist->last - 2 * (i + 1);
 695
 696                 offset = cmdlist->data[reg_pos];
 697                 handle = cmdlist->data[reg_pos + 1];
 698
 699                 reg_type = g2d_get_reg_type(offset);
 700                 if (reg_type == REG_TYPE_NONE) {
 701                         ret = -EFAULT;
 702                         goto err;
 703                 }
 704
 705                 buf_desc = &buf_info->descs[reg_type];
 706
 707                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 708                         unsigned long size;
 709
 710                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 711                         if (!size) {
 712                                 ret = -EFAULT;
 713                                 goto err;
 714                         }
 715
 716                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 717                                                                         size)) {
 718                                 ret = -EFAULT;
 719                                 goto err;
 720                         }
 721
 722                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 723                                                                 file);
 724                         if (IS_ERR(addr)) {
 725                                 ret = -EFAULT;
 726                                 goto err;
 727                         }
 728                 } else {
 729                         struct drm_exynos_g2d_userptr g2d_userptr;
 730
 731                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 732                                 sizeof(struct drm_exynos_g2d_userptr))) {
 733                                 ret = -EFAULT;
 734                                 goto err;
 735                         }
 736
 737                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 738                                                         g2d_userptr.size)) {
 739                                 ret = -EFAULT;
 740                                 goto err;
 741                         }
 742
 743                         addr = g2d_userptr_get_dma_addr(drm_dev,
 744                                                         g2d_userptr.userptr,
 745                                                         g2d_userptr.size,
 746                                                         file,
 747                                                         &handle);
 748                         if (IS_ERR(addr)) {
 749                                 ret = -EFAULT;
 750                                 goto err;
 751                         }
 752                 }
 753
 754                 cmdlist->data[reg_pos + 1] = *addr;
 755                 buf_info->reg_types[i] = reg_type;
 756                 buf_info->handles[reg_type] = handle;
 757         }
 758
 759         return 0;
 760
 761 err:
 762         buf_info->map_nr = i;
 763         return ret;
 764 }
 765
 766 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 767                                   struct g2d_cmdlist_node *node,
 768                                   struct drm_file *filp)
 769 {
 770         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 771         struct g2d_buf_info *buf_info = &node->buf_info;
 772         int i;
 773
 774         for (i = 0; i < buf_info->map_nr; i++) {
 775                 struct g2d_buf_desc *buf_desc;
 776                 enum g2d_reg_type reg_type;
 777                 unsigned long handle;
 778
 779                 reg_type = buf_info->reg_types[i];
 780
 781                 buf_desc = &buf_info->descs[reg_type];
 782                 handle = buf_info->handles[reg_type];
 783
 784                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 785                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 786                                                         filp);
 787                 else
 788                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 789                                                         false);
 790
 791                 buf_info->reg_types[i] = REG_TYPE_NONE;
 792                 buf_info->handles[reg_type] = 0;
 793                 buf_info->types[reg_type] = 0;
 794                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 795         }
 796
 797         buf_info->map_nr = 0;
 798 }
 799
 800 static void g2d_dma_start(struct g2d_data *g2d,
 801                           struct g2d_runqueue_node *runqueue_node)
 802 {
 803         struct g2d_cmdlist_node *node =
 804                                 list_first_entry(&runqueue_node->run_cmdlist,
 805                                                 struct g2d_cmdlist_node, list);
 806         int ret;
 807
 808         ret = pm_runtime_get_sync(g2d->dev);
 809         if (ret < 0)
 810                 return;
 811
 812         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 813         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 814 }
 815
 816 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 817 {
 818         struct g2d_runqueue_node *runqueue_node;
 819
 820         if (list_empty(&g2d->runqueue))
 821                 return NULL;
 822
 823         runqueue_node = list_first_entry(&g2d->runqueue,
 824                                          struct g2d_runqueue_node, list);
 825         list_del_init(&runqueue_node->list);
 826         return runqueue_node;
 827 }
 828
 829 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 830                                    struct g2d_runqueue_node *runqueue_node)
 831 {
 832         struct g2d_cmdlist_node *node;
 833
 834         if (!runqueue_node)
 835                 return;
 836
 837         mutex_lock(&g2d->cmdlist_mutex);
 838         /*
 839          * commands in run_cmdlist have been completed so unmap all gem
 840          * objects in each command node so that they are unreferenced.
 841          */
 842         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 843                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 844         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 845         mutex_unlock(&g2d->cmdlist_mutex);
 846
 847         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 848 }
 849
 850 static void g2d_exec_runqueue(struct g2d_data *g2d)
 851 {
 852         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 853         if (g2d->runqueue_node)
 854                 g2d_dma_start(g2d, g2d->runqueue_node);
 855 }
 856
 857 static void g2d_runqueue_worker(struct work_struct *work)
 858 {
 859         struct g2d_data *g2d = container_of(work, struct g2d_data,
 860                                             runqueue_work);
 861
 862         mutex_lock(&g2d->runqueue_mutex);
 863         pm_runtime_put_sync(g2d->dev);
 864
 865         complete(&g2d->runqueue_node->complete);
 866         if (g2d->runqueue_node->async)
 867                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 868
 869         if (g2d->suspended)
 870                 g2d->runqueue_node = NULL;
 871         else
 872                 g2d_exec_runqueue(g2d);
 873         mutex_unlock(&g2d->runqueue_mutex);
 874 }
 875
 876 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 877 {
 878         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 879         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 880         struct drm_exynos_pending_g2d_event *e;
 881         struct timeval now;
 882         unsigned long flags;
 883
 884         if (list_empty(&runqueue_node->event_list))
 885                 return;
 886
 887         e = list_first_entry(&runqueue_node->event_list,
 888                              struct drm_exynos_pending_g2d_event, base.link);
 889
 890         do_gettimeofday(&now);
 891         e->event.tv_sec = now.tv_sec;
 892         e->event.tv_usec = now.tv_usec;
 893         e->event.cmdlist_no = cmdlist_no;
 894
 895         spin_lock_irqsave(&drm_dev->event_lock, flags);
 896         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 897         wake_up_interruptible(&e->base.file_priv->event_wait);
 898         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 899 }
 900
 901 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 902 {
 903         struct g2d_data *g2d = dev_id;
 904         u32 pending;
 905
 906         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 907         if (pending)
 908                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 909
 910         if (pending & G2D_INTP_GCMD_FIN) {
 911                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 912
 913                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 914                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 915
 916                 g2d_finish_event(g2d, cmdlist_no);
 917
 918                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 919                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 920                         writel_relaxed(G2D_DMA_CONTINUE,
 921                                         g2d->regs + G2D_DMA_COMMAND);
 922                 }
 923         }
 924
 925         if (pending & G2D_INTP_ACMD_FIN)
 926                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 927
 928         return IRQ_HANDLED;
 929 }
 930
 931 static int g2d_check_reg_offset(struct device *dev,
 932                                 struct g2d_cmdlist_node *node,
 933                                 int nr, bool for_addr)
 934 {
 935         struct g2d_cmdlist *cmdlist = node->cmdlist;
 936         int reg_offset;
 937         int index;
 938         int i;
 939
 940         for (i = 0; i < nr; i++) {
 941                 struct g2d_buf_info *buf_info = &node->buf_info;
 942                 struct g2d_buf_desc *buf_desc;
 943                 enum g2d_reg_type reg_type;
 944                 unsigned long value;
 945
 946                 index = cmdlist->last - 2 * (i + 1);
 947
 948                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 949                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 950                         goto err;
 951                 if (reg_offset % 4)
 952                         goto err;
 953
 954                 switch (reg_offset) {
 955                 case G2D_SRC_BASE_ADDR:
 956                 case G2D_SRC_PLANE2_BASE_ADDR:
 957                 case G2D_DST_BASE_ADDR:
 958                 case G2D_DST_PLANE2_BASE_ADDR:
 959                 case G2D_PAT_BASE_ADDR:
 960                 case G2D_MSK_BASE_ADDR:
 961                         if (!for_addr)
 962                                 goto err;
 963
 964                         reg_type = g2d_get_reg_type(reg_offset);
 965                         if (reg_type == REG_TYPE_NONE)
 966                                 goto err;
 967
 968                         /* check userptr buffer type. */
 969                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 970                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 971                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 972                         } else
 973                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 974                         break;
 975                 case G2D_SRC_COLOR_MODE:
 976                 case G2D_DST_COLOR_MODE:
 977                         if (for_addr)
 978                                 goto err;
 979
 980                         reg_type = g2d_get_reg_type(reg_offset);
 981                         if (reg_type == REG_TYPE_NONE)
 982                                 goto err;
 983
 984                         buf_desc = &buf_info->descs[reg_type];
 985                         value = cmdlist->data[index + 1];
 986
 987                         buf_desc->format = value & 0xf;
 988                         break;
 989                 case G2D_SRC_LEFT_TOP:
 990                 case G2D_DST_LEFT_TOP:
 991                         if (for_addr)
 992                                 goto err;
 993
 994                         reg_type = g2d_get_reg_type(reg_offset);
 995                         if (reg_type == REG_TYPE_NONE)
 996                                 goto err;
 997
 998                         buf_desc = &buf_info->descs[reg_type];
 999                         value = cmdlist->data[index + 1];
1000
1001                         buf_desc->left_x = value & 0x1fff;
1002                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1003                         break;
1004                 case G2D_SRC_RIGHT_BOTTOM:
1005                 case G2D_DST_RIGHT_BOTTOM:
1006                         if (for_addr)
1007                                 goto err;
1008
1009                         reg_type = g2d_get_reg_type(reg_offset);
1010                         if (reg_type == REG_TYPE_NONE)
1011                                 goto err;
1012
1013                         buf_desc = &buf_info->descs[reg_type];
1014                         value = cmdlist->data[index + 1];
1015
1016                         buf_desc->right_x = value & 0x1fff;
1017                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1018                         break;
1019                 default:
1020                         if (for_addr)
1021                                 goto err;
1022                         break;
1023                 }
1024         }
1025
1026         return 0;
1027
1028 err:
1029         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1030         return -EINVAL;
1031 }
1032
1033 /* ioctl functions */
1034 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1035                              struct drm_file *file)
1036 {
1037         struct drm_exynos_g2d_get_ver *ver = data;
1038
1039         ver->major = G2D_HW_MAJOR_VER;
1040         ver->minor = G2D_HW_MINOR_VER;
1041
1042         return 0;
1043 }
1044 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1045
1046 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1047                                  struct drm_file *file)
1048 {
1049         struct drm_exynos_file_private *file_priv = file->driver_priv;
1050         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1051         struct device *dev = g2d_priv->dev;
1052         struct g2d_data *g2d;
1053         struct drm_exynos_g2d_set_cmdlist *req = data;
1054         struct drm_exynos_g2d_cmd *cmd;
1055         struct drm_exynos_pending_g2d_event *e;
1056         struct g2d_cmdlist_node *node;
1057         struct g2d_cmdlist *cmdlist;
1058         unsigned long flags;
1059         int size;
1060         int ret;
1061
1062         if (!dev)
1063                 return -ENODEV;
1064
1065         g2d = dev_get_drvdata(dev);
1066         if (!g2d)
1067                 return -EFAULT;
1068
1069         node = g2d_get_cmdlist(g2d);
1070         if (!node)
1071                 return -ENOMEM;
1072
1073         node->event = NULL;
1074
1075         if (req->event_type != G2D_EVENT_NOT) {
1076                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1077                 if (file->event_space < sizeof(e->event)) {
1078                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1079                         ret = -ENOMEM;
1080                         goto err;
1081                 }
1082                 file->event_space -= sizeof(e->event);
1083                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1084
1085                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1086                 if (!e) {
1087                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1088                         file->event_space += sizeof(e->event);
1089                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1090
1091                         ret = -ENOMEM;
1092                         goto err;
1093                 }
1094
1095                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1096                 e->event.base.length = sizeof(e->event);
1097                 e->event.user_data = req->user_data;
1098                 e->base.event = &e->event.base;
1099                 e->base.file_priv = file;
1100                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1101
1102                 node->event = e;
1103         }
1104
1105         cmdlist = node->cmdlist;
1106
1107         cmdlist->last = 0;
1108
1109         /*
1110          * If don't clear SFR registers, the cmdlist is affected by register
1111          * values of previous cmdlist. G2D hw executes SFR clear command and
1112          * a next command at the same time then the next command is ignored and
1113          * is executed rightly from next next command, so needs a dummy command
1114          * to next command of SFR clear command.
1115          */
1116         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1117         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1118         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1119         cmdlist->data[cmdlist->last++] = 0;
1120
1121         /*
1122          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1123          * and GCF bit should be set to INTEN register if user wants
1124          * G2D interrupt event once current command list execution is
1125          * finished.
1126          * Otherwise only ACF bit should be set to INTEN register so
1127          * that one interrupt is occured after all command lists
1128          * have been completed.
1129          */
1130         if (node->event) {
1131                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1132                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1133                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1134                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1135         } else {
1136                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1137                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1138         }
1139
1140         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1141         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1142         if (size > G2D_CMDLIST_DATA_NUM) {
1143                 dev_err(dev, "cmdlist size is too big\n");
1144                 ret = -EINVAL;
1145                 goto err_free_event;
1146         }
1147
1148         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1149
1150         if (copy_from_user(cmdlist->data + cmdlist->last,
1151                                 (void __user *)cmd,
1152                                 sizeof(*cmd) * req->cmd_nr)) {
1153                 ret = -EFAULT;
1154                 goto err_free_event;
1155         }
1156         cmdlist->last += req->cmd_nr * 2;
1157
1158         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1159         if (ret < 0)
1160                 goto err_free_event;
1161
1162         node->buf_info.map_nr = req->cmd_buf_nr;
1163         if (req->cmd_buf_nr) {
1164                 struct drm_exynos_g2d_cmd *cmd_buf;
1165
1166                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1167
1168                 if (copy_from_user(cmdlist->data + cmdlist->last,
1169                                         (void __user *)cmd_buf,
1170                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1171                         ret = -EFAULT;
1172                         goto err_free_event;
1173                 }
1174                 cmdlist->last += req->cmd_buf_nr * 2;
1175
1176                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1177                 if (ret < 0)
1178                         goto err_free_event;
1179
1180                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1181                 if (ret < 0)
1182                         goto err_unmap;
1183         }
1184
1185         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1186         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1187
1188         /* head */
1189         cmdlist->head = cmdlist->last / 2;
1190
1191         /* tail */
1192         cmdlist->data[cmdlist->last] = 0;
1193
1194         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1195
1196         return 0;
1197
1198 err_unmap:
1199         g2d_unmap_cmdlist_gem(g2d, node, file);
1200 err_free_event:
1201         if (node->event) {
1202                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1203                 file->event_space += sizeof(e->event);
1204                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1205                 kfree(node->event);
1206         }
1207 err:
1208         g2d_put_cmdlist(g2d, node);
1209         return ret;
1210 }
1211 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1212
1213 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1214                           struct drm_file *file)
1215 {
1216         struct drm_exynos_file_private *file_priv = file->driver_priv;
1217         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1218         struct device *dev = g2d_priv->dev;
1219         struct g2d_data *g2d;
1220         struct drm_exynos_g2d_exec *req = data;
1221         struct g2d_runqueue_node *runqueue_node;
1222         struct list_head *run_cmdlist;
1223         struct list_head *event_list;
1224
1225         if (!dev)
1226                 return -ENODEV;
1227
1228         g2d = dev_get_drvdata(dev);
1229         if (!g2d)
1230                 return -EFAULT;
1231
1232         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1233         if (!runqueue_node) {
1234                 dev_err(dev, "failed to allocate memory\n");
1235                 return -ENOMEM;
1236         }
1237         run_cmdlist = &runqueue_node->run_cmdlist;
1238         event_list = &runqueue_node->event_list;
1239         INIT_LIST_HEAD(run_cmdlist);
1240         INIT_LIST_HEAD(event_list);
1241         init_completion(&runqueue_node->complete);
1242         runqueue_node->async = req->async;
1243
1244         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1245         list_splice_init(&g2d_priv->event_list, event_list);
1246
1247         if (list_empty(run_cmdlist)) {
1248                 dev_err(dev, "there is no inuse cmdlist\n");
1249                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1250                 return -EPERM;
1251         }
1252
1253         mutex_lock(&g2d->runqueue_mutex);
1254         runqueue_node->pid = current->pid;
1255         runqueue_node->filp = file;
1256         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1257         if (!g2d->runqueue_node)
1258                 g2d_exec_runqueue(g2d);
1259         mutex_unlock(&g2d->runqueue_mutex);
1260
1261         if (runqueue_node->async)
1262                 goto out;
1263
1264         wait_for_completion(&runqueue_node->complete);
1265         g2d_free_runqueue_node(g2d, runqueue_node);
1266
1267 out:
1268         return 0;
1269 }
1270 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1271
1272 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1273 {
1274         struct g2d_data *g2d;
1275         int ret;
1276
1277         g2d = dev_get_drvdata(dev);
1278         if (!g2d)
1279                 return -EFAULT;
1280
1281         /* allocate dma-aware cmdlist buffer. */
1282         ret = g2d_init_cmdlist(g2d);
1283         if (ret < 0) {
1284                 dev_err(dev, "cmdlist init failed\n");
1285                 return ret;
1286         }
1287
1288         if (!is_drm_iommu_supported(drm_dev))
1289                 return 0;
1290
1291         ret = drm_iommu_attach_device(drm_dev, dev);
1292         if (ret < 0) {
1293                 dev_err(dev, "failed to enable iommu.\n");
1294                 g2d_fini_cmdlist(g2d);
1295         }
1296
1297         return ret;
1298
1299 }
1300
1301 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1302 {
1303         if (!is_drm_iommu_supported(drm_dev))
1304                 return;
1305
1306         drm_iommu_detach_device(drm_dev, dev);
1307 }
1308
1309 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1310                         struct drm_file *file)
1311 {
1312         struct drm_exynos_file_private *file_priv = file->driver_priv;
1313         struct exynos_drm_g2d_private *g2d_priv;
1314
1315         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1316         if (!g2d_priv)
1317                 return -ENOMEM;
1318
1319         g2d_priv->dev = dev;
1320         file_priv->g2d_priv = g2d_priv;
1321
1322         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1323         INIT_LIST_HEAD(&g2d_priv->event_list);
1324         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1325
1326         return 0;
1327 }
1328
1329 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1330                         struct drm_file *file)
1331 {
1332         struct drm_exynos_file_private *file_priv = file->driver_priv;
1333         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1334         struct g2d_data *g2d;
1335         struct g2d_cmdlist_node *node, *n;
1336
1337         if (!dev)
1338                 return;
1339
1340         g2d = dev_get_drvdata(dev);
1341         if (!g2d)
1342                 return;
1343
1344         mutex_lock(&g2d->cmdlist_mutex);
1345         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1346                 /*
1347                  * unmap all gem objects not completed.
1348                  *
1349                  * P.S. if current process was terminated forcely then
1350                  * there may be some commands in inuse_cmdlist so unmap
1351                  * them.
1352                  */
1353                 g2d_unmap_cmdlist_gem(g2d, node, file);
1354                 list_move_tail(&node->list, &g2d->free_cmdlist);
1355         }
1356         mutex_unlock(&g2d->cmdlist_mutex);
1357
1358         /* release all g2d_userptr in pool. */
1359         g2d_userptr_free_all(drm_dev, g2d, file);
1360
1361         kfree(file_priv->g2d_priv);
1362 }
1363
1364 static int g2d_probe(struct platform_device *pdev)
1365 {
1366         struct device *dev = &pdev->dev;
1367         struct resource *res;
1368         struct g2d_data *g2d;
1369         struct exynos_drm_subdrv *subdrv;
1370         int ret;
1371
1372         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1373         if (!g2d)
1374                 return -ENOMEM;
1375
1376         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1377                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1378         if (!g2d->runqueue_slab)
1379                 return -ENOMEM;
1380
1381         g2d->dev = dev;
1382
1383         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1384         if (!g2d->g2d_workq) {
1385                 dev_err(dev, "failed to create workqueue\n");
1386                 ret = -EINVAL;
1387                 goto err_destroy_slab;
1388         }
1389
1390         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1391         INIT_LIST_HEAD(&g2d->free_cmdlist);
1392         INIT_LIST_HEAD(&g2d->runqueue);
1393
1394         mutex_init(&g2d->cmdlist_mutex);
1395         mutex_init(&g2d->runqueue_mutex);
1396
1397         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1398         if (IS_ERR(g2d->gate_clk)) {
1399                 dev_err(dev, "failed to get gate clock\n");
1400                 ret = PTR_ERR(g2d->gate_clk);
1401                 goto err_destroy_workqueue;
1402         }
1403
1404         pm_runtime_enable(dev);
1405
1406         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1407
1408         g2d->regs = devm_ioremap_resource(dev, res);
1409         if (IS_ERR(g2d->regs)) {
1410                 ret = PTR_ERR(g2d->regs);
1411                 goto err_put_clk;
1412         }
1413
1414         g2d->irq = platform_get_irq(pdev, 0);
1415         if (g2d->irq < 0) {
1416                 dev_err(dev, "failed to get irq\n");
1417                 ret = g2d->irq;
1418                 goto err_put_clk;
1419         }
1420
1421         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1422                                                                 "drm_g2d", g2d);
1423         if (ret < 0) {
1424                 dev_err(dev, "irq request failed\n");
1425                 goto err_put_clk;
1426         }
1427
1428         g2d->max_pool = MAX_POOL;
1429
1430         platform_set_drvdata(pdev, g2d);
1431
1432         subdrv = &g2d->subdrv;
1433         subdrv->dev = dev;
1434         subdrv->probe = g2d_subdrv_probe;
1435         subdrv->remove = g2d_subdrv_remove;
1436         subdrv->open = g2d_open;
1437         subdrv->close = g2d_close;
1438
1439         ret = exynos_drm_subdrv_register(subdrv);
1440         if (ret < 0) {
1441                 dev_err(dev, "failed to register drm g2d device\n");
1442                 goto err_put_clk;
1443         }
1444
1445         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1446                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1447
1448         return 0;
1449
1450 err_put_clk:
1451         pm_runtime_disable(dev);
1452 err_destroy_workqueue:
1453         destroy_workqueue(g2d->g2d_workq);
1454 err_destroy_slab:
1455         kmem_cache_destroy(g2d->runqueue_slab);
1456         return ret;
1457 }
1458
1459 static int g2d_remove(struct platform_device *pdev)
1460 {
1461         struct g2d_data *g2d = platform_get_drvdata(pdev);
1462
1463         cancel_work_sync(&g2d->runqueue_work);
1464         exynos_drm_subdrv_unregister(&g2d->subdrv);
1465
1466         while (g2d->runqueue_node) {
1467                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1468                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1469         }
1470
1471         pm_runtime_disable(&pdev->dev);
1472
1473         g2d_fini_cmdlist(g2d);
1474         destroy_workqueue(g2d->g2d_workq);
1475         kmem_cache_destroy(g2d->runqueue_slab);
1476
1477         return 0;
1478 }
1479
1480 #ifdef CONFIG_PM_SLEEP
1481 static int g2d_suspend(struct device *dev)
1482 {
1483         struct g2d_data *g2d = dev_get_drvdata(dev);
1484
1485         mutex_lock(&g2d->runqueue_mutex);
1486         g2d->suspended = true;
1487         mutex_unlock(&g2d->runqueue_mutex);
1488
1489         while (g2d->runqueue_node)
1490                 /* FIXME: good range? */
1491                 usleep_range(500, 1000);
1492
1493         flush_work(&g2d->runqueue_work);
1494
1495         return 0;
1496 }
1497
1498 static int g2d_resume(struct device *dev)
1499 {
1500         struct g2d_data *g2d = dev_get_drvdata(dev);
1501
1502         g2d->suspended = false;
1503         g2d_exec_runqueue(g2d);
1504
1505         return 0;
1506 }
1507 #endif
1508
1509 #ifdef CONFIG_PM_RUNTIME
1510 static int g2d_runtime_suspend(struct device *dev)
1511 {
1512         struct g2d_data *g2d = dev_get_drvdata(dev);
1513
1514         clk_disable_unprepare(g2d->gate_clk);
1515
1516         return 0;
1517 }
1518
1519 static int g2d_runtime_resume(struct device *dev)
1520 {
1521         struct g2d_data *g2d = dev_get_drvdata(dev);
1522         int ret;
1523
1524         ret = clk_prepare_enable(g2d->gate_clk);
1525         if (ret < 0)
1526                 dev_warn(dev, "failed to enable clock.\n");
1527
1528         return ret;
1529 }
1530 #endif
1531
1532 static const struct dev_pm_ops g2d_pm_ops = {
1533         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1534         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1535 };
1536
1537 static const struct of_device_id exynos_g2d_match[] = {
1538         { .compatible = "samsung,exynos5250-g2d" },
1539         {},
1540 };
1541
1542 struct platform_driver g2d_driver = {
1543         .probe          = g2d_probe,
1544         .remove         = g2d_remove,
1545         .driver         = {
1546                 .name   = "s5p-g2d",
1547                 .owner  = THIS_MODULE,
1548                 .pm     = &g2d_pm_ops,
1549                 .of_match_table = exynos_g2d_match,
1550         },
1551 };