kernel/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
 306         if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
 307                 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 308                                 g2d->cmdlist_pool_virt,
 309                                 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 310         }
 311 }
 312
 313 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 314 {
 315         struct device *dev = g2d->dev;
 316         struct g2d_cmdlist_node *node;
 317
 318         mutex_lock(&g2d->cmdlist_mutex);
 319         if (list_empty(&g2d->free_cmdlist)) {
 320                 dev_err(dev, "there is no free cmdlist\n");
 321                 mutex_unlock(&g2d->cmdlist_mutex);
 322                 return NULL;
 323         }
 324
 325         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 326                                 list);
 327         list_del_init(&node->list);
 328         mutex_unlock(&g2d->cmdlist_mutex);
 329
 330         return node;
 331 }
 332
 333 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 334 {
 335         mutex_lock(&g2d->cmdlist_mutex);
 336         list_move_tail(&node->list, &g2d->free_cmdlist);
 337         mutex_unlock(&g2d->cmdlist_mutex);
 338 }
 339
 340 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 341                                      struct g2d_cmdlist_node *node)
 342 {
 343         struct g2d_cmdlist_node *lnode;
 344
 345         if (list_empty(&g2d_priv->inuse_cmdlist))
 346                 goto add_to_list;
 347
 348         /* this links to base address of new cmdlist */
 349         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 350                                 struct g2d_cmdlist_node, list);
 351         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 352
 353 add_to_list:
 354         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 355
 356         if (node->event)
 357                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 358 }
 359
 360 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 361                                         unsigned long obj,
 362                                         bool force)
 363 {
 364         struct g2d_cmdlist_userptr *g2d_userptr =
 365                                         (struct g2d_cmdlist_userptr *)obj;
 366
 367         if (!obj)
 368                 return;
 369
 370         if (force)
 371                 goto out;
 372
 373         atomic_dec(&g2d_userptr->refcount);
 374
 375         if (atomic_read(&g2d_userptr->refcount) > 0)
 376                 return;
 377
 378         if (g2d_userptr->in_pool)
 379                 return;
 380
 381 out:
 382         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
 383                                         DMA_BIDIRECTIONAL);
 384
 385         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 386                                         g2d_userptr->npages,
 387                                         g2d_userptr->vma);
 388
 389         exynos_gem_put_vma(g2d_userptr->vma);
 390
 391         if (!g2d_userptr->out_of_list)
 392                 list_del_init(&g2d_userptr->list);
 393
 394         sg_free_table(g2d_userptr->sgt);
 395         kfree(g2d_userptr->sgt);
 396
 397         drm_free_large(g2d_userptr->pages);
 398         kfree(g2d_userptr);
 399 }
 400
 401 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 402                                         unsigned long userptr,
 403                                         unsigned long size,
 404                                         struct drm_file *filp,
 405                                         unsigned long *obj)
 406 {
 407         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 408         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 409         struct g2d_cmdlist_userptr *g2d_userptr;
 410         struct g2d_data *g2d;
 411         struct page **pages;
 412         struct sg_table *sgt;
 413         struct vm_area_struct *vma;
 414         unsigned long start, end;
 415         unsigned int npages, offset;
 416         int ret;
 417
 418         if (!size) {
 419                 DRM_ERROR("invalid userptr size.\n");
 420                 return ERR_PTR(-EINVAL);
 421         }
 422
 423         g2d = dev_get_drvdata(g2d_priv->dev);
 424
 425         /* check if userptr already exists in userptr_list. */
 426         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 427                 if (g2d_userptr->userptr == userptr) {
 428                         /*
 429                          * also check size because there could be same address
 430                          * and different size.
 431                          */
 432                         if (g2d_userptr->size == size) {
 433                                 atomic_inc(&g2d_userptr->refcount);
 434                                 *obj = (unsigned long)g2d_userptr;
 435
 436                                 return &g2d_userptr->dma_addr;
 437                         }
 438
 439                         /*
 440                          * at this moment, maybe g2d dma is accessing this
 441                          * g2d_userptr memory region so just remove this
 442                          * g2d_userptr object from userptr_list not to be
 443                          * referred again and also except it the userptr
 444                          * pool to be released after the dma access completion.
 445                          */
 446                         g2d_userptr->out_of_list = true;
 447                         g2d_userptr->in_pool = false;
 448                         list_del_init(&g2d_userptr->list);
 449
 450                         break;
 451                 }
 452         }
 453
 454         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 455         if (!g2d_userptr)
 456                 return ERR_PTR(-ENOMEM);
 457
 458         atomic_set(&g2d_userptr->refcount, 1);
 459
 460         start = userptr & PAGE_MASK;
 461         offset = userptr & ~PAGE_MASK;
 462         end = PAGE_ALIGN(userptr + size);
 463         npages = (end - start) >> PAGE_SHIFT;
 464         g2d_userptr->npages = npages;
 465
 466         pages = drm_calloc_large(npages, sizeof(struct page *));
 467         if (!pages) {
 468                 DRM_ERROR("failed to allocate pages.\n");
 469                 ret = -ENOMEM;
 470                 goto err_free;
 471         }
 472
 473         down_read(&current->mm->mmap_sem);
 474         vma = find_vma(current->mm, userptr);
 475         if (!vma) {
 476                 up_read(&current->mm->mmap_sem);
 477                 DRM_ERROR("failed to get vm region.\n");
 478                 ret = -EFAULT;
 479                 goto err_free_pages;
 480         }
 481
 482         if (vma->vm_end < userptr + size) {
 483                 up_read(&current->mm->mmap_sem);
 484                 DRM_ERROR("vma is too small.\n");
 485                 ret = -EFAULT;
 486                 goto err_free_pages;
 487         }
 488
 489         g2d_userptr->vma = exynos_gem_get_vma(vma);
 490         if (!g2d_userptr->vma) {
 491                 up_read(&current->mm->mmap_sem);
 492                 DRM_ERROR("failed to copy vma.\n");
 493                 ret = -ENOMEM;
 494                 goto err_free_pages;
 495         }
 496
 497         g2d_userptr->size = size;
 498
 499         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
 500                                                 npages, pages, vma);
 501         if (ret < 0) {
 502                 up_read(&current->mm->mmap_sem);
 503                 DRM_ERROR("failed to get user pages from userptr.\n");
 504                 goto err_put_vma;
 505         }
 506
 507         up_read(&current->mm->mmap_sem);
 508         g2d_userptr->pages = pages;
 509
 510         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 511         if (!sgt) {
 512                 ret = -ENOMEM;
 513                 goto err_free_userptr;
 514         }
 515
 516         ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
 517                                         size, GFP_KERNEL);
 518         if (ret < 0) {
 519                 DRM_ERROR("failed to get sgt from pages.\n");
 520                 goto err_free_sgt;
 521         }
 522
 523         g2d_userptr->sgt = sgt;
 524
 525         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 526                                                 DMA_BIDIRECTIONAL);
 527         if (ret < 0) {
 528                 DRM_ERROR("failed to map sgt with dma region.\n");
 529                 goto err_sg_free_table;
 530         }
 531
 532         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 533         g2d_userptr->userptr = userptr;
 534
 535         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 536
 537         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 538                 g2d->current_pool += npages << PAGE_SHIFT;
 539                 g2d_userptr->in_pool = true;
 540         }
 541
 542         *obj = (unsigned long)g2d_userptr;
 543
 544         return &g2d_userptr->dma_addr;
 545
 546 err_sg_free_table:
 547         sg_free_table(sgt);
 548
 549 err_free_sgt:
 550         kfree(sgt);
 551
 552 err_free_userptr:
 553         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
 554                                         g2d_userptr->npages,
 555                                         g2d_userptr->vma);
 556
 557 err_put_vma:
 558         exynos_gem_put_vma(g2d_userptr->vma);
 559
 560 err_free_pages:
 561         drm_free_large(pages);
 562
 563 err_free:
 564         kfree(g2d_userptr);
 565
 566         return ERR_PTR(ret);
 567 }
 568
 569 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 570                                         struct g2d_data *g2d,
 571                                         struct drm_file *filp)
 572 {
 573         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 574         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 575         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 576
 577         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 578                 if (g2d_userptr->in_pool)
 579                         g2d_userptr_put_dma_addr(drm_dev,
 580                                                 (unsigned long)g2d_userptr,
 581                                                 true);
 582
 583         g2d->current_pool = 0;
 584 }
 585
 586 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 587 {
 588         enum g2d_reg_type reg_type;
 589
 590         switch (reg_offset) {
 591         case G2D_SRC_BASE_ADDR:
 592         case G2D_SRC_COLOR_MODE:
 593         case G2D_SRC_LEFT_TOP:
 594         case G2D_SRC_RIGHT_BOTTOM:
 595                 reg_type = REG_TYPE_SRC;
 596                 break;
 597         case G2D_SRC_PLANE2_BASE_ADDR:
 598                 reg_type = REG_TYPE_SRC_PLANE2;
 599                 break;
 600         case G2D_DST_BASE_ADDR:
 601         case G2D_DST_COLOR_MODE:
 602         case G2D_DST_LEFT_TOP:
 603         case G2D_DST_RIGHT_BOTTOM:
 604                 reg_type = REG_TYPE_DST;
 605                 break;
 606         case G2D_DST_PLANE2_BASE_ADDR:
 607                 reg_type = REG_TYPE_DST_PLANE2;
 608                 break;
 609         case G2D_PAT_BASE_ADDR:
 610                 reg_type = REG_TYPE_PAT;
 611                 break;
 612         case G2D_MSK_BASE_ADDR:
 613                 reg_type = REG_TYPE_MSK;
 614                 break;
 615         default:
 616                 reg_type = REG_TYPE_NONE;
 617                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 618                 break;
 619         }
 620
 621         return reg_type;
 622 }
 623
 624 static unsigned long g2d_get_buf_bpp(unsigned int format)
 625 {
 626         unsigned long bpp;
 627
 628         switch (format) {
 629         case G2D_FMT_XRGB8888:
 630         case G2D_FMT_ARGB8888:
 631                 bpp = 4;
 632                 break;
 633         case G2D_FMT_RGB565:
 634         case G2D_FMT_XRGB1555:
 635         case G2D_FMT_ARGB1555:
 636         case G2D_FMT_XRGB4444:
 637         case G2D_FMT_ARGB4444:
 638                 bpp = 2;
 639                 break;
 640         case G2D_FMT_PACKED_RGB888:
 641                 bpp = 3;
 642                 break;
 643         default:
 644                 bpp = 1;
 645                 break;
 646         }
 647
 648         return bpp;
 649 }
 650
 651 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 652                                                 enum g2d_reg_type reg_type,
 653                                                 unsigned long size)
 654 {
 655         unsigned int width, height;
 656         unsigned long area;
 657
 658         /*
 659          * check source and destination buffers only.
 660          * so the others are always valid.
 661          */
 662         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 663                 return true;
 664
 665         width = buf_desc->right_x - buf_desc->left_x;
 666         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 667                 DRM_ERROR("width[%u] is out of range!\n", width);
 668                 return false;
 669         }
 670
 671         height = buf_desc->bottom_y - buf_desc->top_y;
 672         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 673                 DRM_ERROR("height[%u] is out of range!\n", height);
 674                 return false;
 675         }
 676
 677         area = (unsigned long)width * (unsigned long)height *
 678                                         g2d_get_buf_bpp(buf_desc->format);
 679         if (area > size) {
 680                 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
 681                 return false;
 682         }
 683
 684         return true;
 685 }
 686
 687 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 688                                 struct g2d_cmdlist_node *node,
 689                                 struct drm_device *drm_dev,
 690                                 struct drm_file *file)
 691 {
 692         struct g2d_cmdlist *cmdlist = node->cmdlist;
 693         struct g2d_buf_info *buf_info = &node->buf_info;
 694         int offset;
 695         int ret;
 696         int i;
 697
 698         for (i = 0; i < buf_info->map_nr; i++) {
 699                 struct g2d_buf_desc *buf_desc;
 700                 enum g2d_reg_type reg_type;
 701                 int reg_pos;
 702                 unsigned long handle;
 703                 dma_addr_t *addr;
 704
 705                 reg_pos = cmdlist->last - 2 * (i + 1);
 706
 707                 offset = cmdlist->data[reg_pos];
 708                 handle = cmdlist->data[reg_pos + 1];
 709
 710                 reg_type = g2d_get_reg_type(offset);
 711                 if (reg_type == REG_TYPE_NONE) {
 712                         ret = -EFAULT;
 713                         goto err;
 714                 }
 715
 716                 buf_desc = &buf_info->descs[reg_type];
 717
 718                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 719                         unsigned long size;
 720
 721                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 722                         if (!size) {
 723                                 ret = -EFAULT;
 724                                 goto err;
 725                         }
 726
 727                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 728                                                                         size)) {
 729                                 ret = -EFAULT;
 730                                 goto err;
 731                         }
 732
 733                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 734                                                                 file);
 735                         if (IS_ERR(addr)) {
 736                                 ret = -EFAULT;
 737                                 goto err;
 738                         }
 739                 } else {
 740                         struct drm_exynos_g2d_userptr g2d_userptr;
 741
 742                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 743                                 sizeof(struct drm_exynos_g2d_userptr))) {
 744                                 ret = -EFAULT;
 745                                 goto err;
 746                         }
 747
 748                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 749                                                         g2d_userptr.size)) {
 750                                 ret = -EFAULT;
 751                                 goto err;
 752                         }
 753
 754                         addr = g2d_userptr_get_dma_addr(drm_dev,
 755                                                         g2d_userptr.userptr,
 756                                                         g2d_userptr.size,
 757                                                         file,
 758                                                         &handle);
 759                         if (IS_ERR(addr)) {
 760                                 ret = -EFAULT;
 761                                 goto err;
 762                         }
 763                 }
 764
 765                 cmdlist->data[reg_pos + 1] = *addr;
 766                 buf_info->reg_types[i] = reg_type;
 767                 buf_info->handles[reg_type] = handle;
 768         }
 769
 770         return 0;
 771
 772 err:
 773         buf_info->map_nr = i;
 774         return ret;
 775 }
 776
 777 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 778                                   struct g2d_cmdlist_node *node,
 779                                   struct drm_file *filp)
 780 {
 781         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 782         struct g2d_buf_info *buf_info = &node->buf_info;
 783         int i;
 784
 785         for (i = 0; i < buf_info->map_nr; i++) {
 786                 struct g2d_buf_desc *buf_desc;
 787                 enum g2d_reg_type reg_type;
 788                 unsigned long handle;
 789
 790                 reg_type = buf_info->reg_types[i];
 791
 792                 buf_desc = &buf_info->descs[reg_type];
 793                 handle = buf_info->handles[reg_type];
 794
 795                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 796                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 797                                                         filp);
 798                 else
 799                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 800                                                         false);
 801
 802                 buf_info->reg_types[i] = REG_TYPE_NONE;
 803                 buf_info->handles[reg_type] = 0;
 804                 buf_info->types[reg_type] = 0;
 805                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 806         }
 807
 808         buf_info->map_nr = 0;
 809 }
 810
 811 static void g2d_dma_start(struct g2d_data *g2d,
 812                           struct g2d_runqueue_node *runqueue_node)
 813 {
 814         struct g2d_cmdlist_node *node =
 815                                 list_first_entry(&runqueue_node->run_cmdlist,
 816                                                 struct g2d_cmdlist_node, list);
 817         int ret;
 818
 819         ret = pm_runtime_get_sync(g2d->dev);
 820         if (ret < 0)
 821                 return;
 822
 823         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 824         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 825 }
 826
 827 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 828 {
 829         struct g2d_runqueue_node *runqueue_node;
 830
 831         if (list_empty(&g2d->runqueue))
 832                 return NULL;
 833
 834         runqueue_node = list_first_entry(&g2d->runqueue,
 835                                          struct g2d_runqueue_node, list);
 836         list_del_init(&runqueue_node->list);
 837         return runqueue_node;
 838 }
 839
 840 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 841                                    struct g2d_runqueue_node *runqueue_node)
 842 {
 843         struct g2d_cmdlist_node *node;
 844
 845         if (!runqueue_node)
 846                 return;
 847
 848         mutex_lock(&g2d->cmdlist_mutex);
 849         /*
 850          * commands in run_cmdlist have been completed so unmap all gem
 851          * objects in each command node so that they are unreferenced.
 852          */
 853         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 854                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 855         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 856         mutex_unlock(&g2d->cmdlist_mutex);
 857
 858         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 859 }
 860
 861 static void g2d_exec_runqueue(struct g2d_data *g2d)
 862 {
 863         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 864         if (g2d->runqueue_node)
 865                 g2d_dma_start(g2d, g2d->runqueue_node);
 866 }
 867
 868 static void g2d_runqueue_worker(struct work_struct *work)
 869 {
 870         struct g2d_data *g2d = container_of(work, struct g2d_data,
 871                                             runqueue_work);
 872
 873         mutex_lock(&g2d->runqueue_mutex);
 874         pm_runtime_put_sync(g2d->dev);
 875
 876         complete(&g2d->runqueue_node->complete);
 877         if (g2d->runqueue_node->async)
 878                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 879
 880         if (g2d->suspended)
 881                 g2d->runqueue_node = NULL;
 882         else
 883                 g2d_exec_runqueue(g2d);
 884         mutex_unlock(&g2d->runqueue_mutex);
 885 }
 886
 887 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 888 {
 889         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 890         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 891         struct drm_exynos_pending_g2d_event *e;
 892         struct timeval now;
 893         unsigned long flags;
 894
 895         if (list_empty(&runqueue_node->event_list))
 896                 return;
 897
 898         e = list_first_entry(&runqueue_node->event_list,
 899                              struct drm_exynos_pending_g2d_event, base.link);
 900
 901         do_gettimeofday(&now);
 902         e->event.tv_sec = now.tv_sec;
 903         e->event.tv_usec = now.tv_usec;
 904         e->event.cmdlist_no = cmdlist_no;
 905
 906         spin_lock_irqsave(&drm_dev->event_lock, flags);
 907         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 908         wake_up_interruptible(&e->base.file_priv->event_wait);
 909         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 910 }
 911
 912 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 913 {
 914         struct g2d_data *g2d = dev_id;
 915         u32 pending;
 916
 917         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 918         if (pending)
 919                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 920
 921         if (pending & G2D_INTP_GCMD_FIN) {
 922                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 923
 924                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 925                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 926
 927                 g2d_finish_event(g2d, cmdlist_no);
 928
 929                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 930                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 931                         writel_relaxed(G2D_DMA_CONTINUE,
 932                                         g2d->regs + G2D_DMA_COMMAND);
 933                 }
 934         }
 935
 936         if (pending & G2D_INTP_ACMD_FIN)
 937                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 938
 939         return IRQ_HANDLED;
 940 }
 941
 942 static int g2d_check_reg_offset(struct device *dev,
 943                                 struct g2d_cmdlist_node *node,
 944                                 int nr, bool for_addr)
 945 {
 946         struct g2d_cmdlist *cmdlist = node->cmdlist;
 947         int reg_offset;
 948         int index;
 949         int i;
 950
 951         for (i = 0; i < nr; i++) {
 952                 struct g2d_buf_info *buf_info = &node->buf_info;
 953                 struct g2d_buf_desc *buf_desc;
 954                 enum g2d_reg_type reg_type;
 955                 unsigned long value;
 956
 957                 index = cmdlist->last - 2 * (i + 1);
 958
 959                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 960                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 961                         goto err;
 962                 if (reg_offset % 4)
 963                         goto err;
 964
 965                 switch (reg_offset) {
 966                 case G2D_SRC_BASE_ADDR:
 967                 case G2D_SRC_PLANE2_BASE_ADDR:
 968                 case G2D_DST_BASE_ADDR:
 969                 case G2D_DST_PLANE2_BASE_ADDR:
 970                 case G2D_PAT_BASE_ADDR:
 971                 case G2D_MSK_BASE_ADDR:
 972                         if (!for_addr)
 973                                 goto err;
 974
 975                         reg_type = g2d_get_reg_type(reg_offset);
 976                         if (reg_type == REG_TYPE_NONE)
 977                                 goto err;
 978
 979                         /* check userptr buffer type. */
 980                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 981                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 982                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 983                         } else
 984                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 985                         break;
 986                 case G2D_SRC_COLOR_MODE:
 987                 case G2D_DST_COLOR_MODE:
 988                         if (for_addr)
 989                                 goto err;
 990
 991                         reg_type = g2d_get_reg_type(reg_offset);
 992                         if (reg_type == REG_TYPE_NONE)
 993                                 goto err;
 994
 995                         buf_desc = &buf_info->descs[reg_type];
 996                         value = cmdlist->data[index + 1];
 997
 998                         buf_desc->format = value & 0xf;
 999                         break;
1000                 case G2D_SRC_LEFT_TOP:
1001                 case G2D_DST_LEFT_TOP:
1002                         if (for_addr)
1003                                 goto err;
1004
1005                         reg_type = g2d_get_reg_type(reg_offset);
1006                         if (reg_type == REG_TYPE_NONE)
1007                                 goto err;
1008
1009                         buf_desc = &buf_info->descs[reg_type];
1010                         value = cmdlist->data[index + 1];
1011
1012                         buf_desc->left_x = value & 0x1fff;
1013                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1014                         break;
1015                 case G2D_SRC_RIGHT_BOTTOM:
1016                 case G2D_DST_RIGHT_BOTTOM:
1017                         if (for_addr)
1018                                 goto err;
1019
1020                         reg_type = g2d_get_reg_type(reg_offset);
1021                         if (reg_type == REG_TYPE_NONE)
1022                                 goto err;
1023
1024                         buf_desc = &buf_info->descs[reg_type];
1025                         value = cmdlist->data[index + 1];
1026
1027                         buf_desc->right_x = value & 0x1fff;
1028                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1029                         break;
1030                 default:
1031                         if (for_addr)
1032                                 goto err;
1033                         break;
1034                 }
1035         }
1036
1037         return 0;
1038
1039 err:
1040         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1041         return -EINVAL;
1042 }
1043
1044 /* ioctl functions */
1045 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1046                              struct drm_file *file)
1047 {
1048         struct drm_exynos_file_private *file_priv = file->driver_priv;
1049         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1050         struct device *dev;
1051         struct g2d_data *g2d;
1052         struct drm_exynos_g2d_get_ver *ver = data;
1053
1054         if (!g2d_priv)
1055                 return -ENODEV;
1056
1057         dev = g2d_priv->dev;
1058         if (!dev)
1059                 return -ENODEV;
1060
1061         g2d = dev_get_drvdata(dev);
1062         if (!g2d)
1063                 return -EFAULT;
1064
1065         ver->major = G2D_HW_MAJOR_VER;
1066         ver->minor = G2D_HW_MINOR_VER;
1067
1068         return 0;
1069 }
1070 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1071
1072 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1073                                  struct drm_file *file)
1074 {
1075         struct drm_exynos_file_private *file_priv = file->driver_priv;
1076         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1077         struct device *dev;
1078         struct g2d_data *g2d;
1079         struct drm_exynos_g2d_set_cmdlist *req = data;
1080         struct drm_exynos_g2d_cmd *cmd;
1081         struct drm_exynos_pending_g2d_event *e;
1082         struct g2d_cmdlist_node *node;
1083         struct g2d_cmdlist *cmdlist;
1084         unsigned long flags;
1085         int size;
1086         int ret;
1087
1088         if (!g2d_priv)
1089                 return -ENODEV;
1090
1091         dev = g2d_priv->dev;
1092         if (!dev)
1093                 return -ENODEV;
1094
1095         g2d = dev_get_drvdata(dev);
1096         if (!g2d)
1097                 return -EFAULT;
1098
1099         node = g2d_get_cmdlist(g2d);
1100         if (!node)
1101                 return -ENOMEM;
1102
1103         node->event = NULL;
1104
1105         if (req->event_type != G2D_EVENT_NOT) {
1106                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1107                 if (file->event_space < sizeof(e->event)) {
1108                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1109                         ret = -ENOMEM;
1110                         goto err;
1111                 }
1112                 file->event_space -= sizeof(e->event);
1113                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1114
1115                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1116                 if (!e) {
1117                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1118                         file->event_space += sizeof(e->event);
1119                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1120
1121                         ret = -ENOMEM;
1122                         goto err;
1123                 }
1124
1125                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1126                 e->event.base.length = sizeof(e->event);
1127                 e->event.user_data = req->user_data;
1128                 e->base.event = &e->event.base;
1129                 e->base.file_priv = file;
1130                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1131
1132                 node->event = e;
1133         }
1134
1135         cmdlist = node->cmdlist;
1136
1137         cmdlist->last = 0;
1138
1139         /*
1140          * If don't clear SFR registers, the cmdlist is affected by register
1141          * values of previous cmdlist. G2D hw executes SFR clear command and
1142          * a next command at the same time then the next command is ignored and
1143          * is executed rightly from next next command, so needs a dummy command
1144          * to next command of SFR clear command.
1145          */
1146         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1147         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1148         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1149         cmdlist->data[cmdlist->last++] = 0;
1150
1151         /*
1152          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1153          * and GCF bit should be set to INTEN register if user wants
1154          * G2D interrupt event once current command list execution is
1155          * finished.
1156          * Otherwise only ACF bit should be set to INTEN register so
1157          * that one interrupt is occurred after all command lists
1158          * have been completed.
1159          */
1160         if (node->event) {
1161                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1162                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1163                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1164                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1165         } else {
1166                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1167                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1168         }
1169
1170         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1171         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1172         if (size > G2D_CMDLIST_DATA_NUM) {
1173                 dev_err(dev, "cmdlist size is too big\n");
1174                 ret = -EINVAL;
1175                 goto err_free_event;
1176         }
1177
1178         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1179
1180         if (copy_from_user(cmdlist->data + cmdlist->last,
1181                                 (void __user *)cmd,
1182                                 sizeof(*cmd) * req->cmd_nr)) {
1183                 ret = -EFAULT;
1184                 goto err_free_event;
1185         }
1186         cmdlist->last += req->cmd_nr * 2;
1187
1188         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1189         if (ret < 0)
1190                 goto err_free_event;
1191
1192         node->buf_info.map_nr = req->cmd_buf_nr;
1193         if (req->cmd_buf_nr) {
1194                 struct drm_exynos_g2d_cmd *cmd_buf;
1195
1196                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1197
1198                 if (copy_from_user(cmdlist->data + cmdlist->last,
1199                                         (void __user *)cmd_buf,
1200                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1201                         ret = -EFAULT;
1202                         goto err_free_event;
1203                 }
1204                 cmdlist->last += req->cmd_buf_nr * 2;
1205
1206                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1207                 if (ret < 0)
1208                         goto err_free_event;
1209
1210                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1211                 if (ret < 0)
1212                         goto err_unmap;
1213         }
1214
1215         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1216         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1217
1218         /* head */
1219         cmdlist->head = cmdlist->last / 2;
1220
1221         /* tail */
1222         cmdlist->data[cmdlist->last] = 0;
1223
1224         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1225
1226         return 0;
1227
1228 err_unmap:
1229         g2d_unmap_cmdlist_gem(g2d, node, file);
1230 err_free_event:
1231         if (node->event) {
1232                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1233                 file->event_space += sizeof(e->event);
1234                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1235                 kfree(node->event);
1236         }
1237 err:
1238         g2d_put_cmdlist(g2d, node);
1239         return ret;
1240 }
1241 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1242
1243 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1244                           struct drm_file *file)
1245 {
1246         struct drm_exynos_file_private *file_priv = file->driver_priv;
1247         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1248         struct device *dev;
1249         struct g2d_data *g2d;
1250         struct drm_exynos_g2d_exec *req = data;
1251         struct g2d_runqueue_node *runqueue_node;
1252         struct list_head *run_cmdlist;
1253         struct list_head *event_list;
1254
1255         if (!g2d_priv)
1256                 return -ENODEV;
1257
1258         dev = g2d_priv->dev;
1259         if (!dev)
1260                 return -ENODEV;
1261
1262         g2d = dev_get_drvdata(dev);
1263         if (!g2d)
1264                 return -EFAULT;
1265
1266         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1267         if (!runqueue_node) {
1268                 dev_err(dev, "failed to allocate memory\n");
1269                 return -ENOMEM;
1270         }
1271         run_cmdlist = &runqueue_node->run_cmdlist;
1272         event_list = &runqueue_node->event_list;
1273         INIT_LIST_HEAD(run_cmdlist);
1274         INIT_LIST_HEAD(event_list);
1275         init_completion(&runqueue_node->complete);
1276         runqueue_node->async = req->async;
1277
1278         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1279         list_splice_init(&g2d_priv->event_list, event_list);
1280
1281         if (list_empty(run_cmdlist)) {
1282                 dev_err(dev, "there is no inuse cmdlist\n");
1283                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1284                 return -EPERM;
1285         }
1286
1287         mutex_lock(&g2d->runqueue_mutex);
1288         runqueue_node->pid = current->pid;
1289         runqueue_node->filp = file;
1290         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1291         if (!g2d->runqueue_node)
1292                 g2d_exec_runqueue(g2d);
1293         mutex_unlock(&g2d->runqueue_mutex);
1294
1295         if (runqueue_node->async)
1296                 goto out;
1297
1298         wait_for_completion(&runqueue_node->complete);
1299         g2d_free_runqueue_node(g2d, runqueue_node);
1300
1301 out:
1302         return 0;
1303 }
1304 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1305
1306 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1307 {
1308         struct g2d_data *g2d;
1309         int ret;
1310
1311         g2d = dev_get_drvdata(dev);
1312         if (!g2d)
1313                 return -EFAULT;
1314
1315         /* allocate dma-aware cmdlist buffer. */
1316         ret = g2d_init_cmdlist(g2d);
1317         if (ret < 0) {
1318                 dev_err(dev, "cmdlist init failed\n");
1319                 return ret;
1320         }
1321
1322         if (!is_drm_iommu_supported(drm_dev))
1323                 return 0;
1324
1325         ret = drm_iommu_attach_device(drm_dev, dev);
1326         if (ret < 0) {
1327                 dev_err(dev, "failed to enable iommu.\n");
1328                 g2d_fini_cmdlist(g2d);
1329         }
1330
1331         return ret;
1332
1333 }
1334
1335 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1336 {
1337         if (!is_drm_iommu_supported(drm_dev))
1338                 return;
1339
1340         drm_iommu_detach_device(drm_dev, dev);
1341 }
1342
1343 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1344                         struct drm_file *file)
1345 {
1346         struct drm_exynos_file_private *file_priv = file->driver_priv;
1347         struct exynos_drm_g2d_private *g2d_priv;
1348
1349         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1350         if (!g2d_priv)
1351                 return -ENOMEM;
1352
1353         g2d_priv->dev = dev;
1354         file_priv->g2d_priv = g2d_priv;
1355
1356         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1357         INIT_LIST_HEAD(&g2d_priv->event_list);
1358         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1359
1360         return 0;
1361 }
1362
1363 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1364                         struct drm_file *file)
1365 {
1366         struct drm_exynos_file_private *file_priv = file->driver_priv;
1367         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1368         struct g2d_data *g2d;
1369         struct g2d_cmdlist_node *node, *n;
1370
1371         if (!dev)
1372                 return;
1373
1374         g2d = dev_get_drvdata(dev);
1375         if (!g2d)
1376                 return;
1377
1378         mutex_lock(&g2d->cmdlist_mutex);
1379         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1380                 /*
1381                  * unmap all gem objects not completed.
1382                  *
1383                  * P.S. if current process was terminated forcely then
1384                  * there may be some commands in inuse_cmdlist so unmap
1385                  * them.
1386                  */
1387                 g2d_unmap_cmdlist_gem(g2d, node, file);
1388                 list_move_tail(&node->list, &g2d->free_cmdlist);
1389         }
1390         mutex_unlock(&g2d->cmdlist_mutex);
1391
1392         /* release all g2d_userptr in pool. */
1393         g2d_userptr_free_all(drm_dev, g2d, file);
1394
1395         kfree(file_priv->g2d_priv);
1396 }
1397
1398 static int g2d_probe(struct platform_device *pdev)
1399 {
1400         struct device *dev = &pdev->dev;
1401         struct resource *res;
1402         struct g2d_data *g2d;
1403         struct exynos_drm_subdrv *subdrv;
1404         int ret;
1405
1406         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1407         if (!g2d)
1408                 return -ENOMEM;
1409
1410         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1411                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1412         if (!g2d->runqueue_slab)
1413                 return -ENOMEM;
1414
1415         g2d->dev = dev;
1416
1417         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1418         if (!g2d->g2d_workq) {
1419                 dev_err(dev, "failed to create workqueue\n");
1420                 ret = -EINVAL;
1421                 goto err_destroy_slab;
1422         }
1423
1424         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1425         INIT_LIST_HEAD(&g2d->free_cmdlist);
1426         INIT_LIST_HEAD(&g2d->runqueue);
1427
1428         mutex_init(&g2d->cmdlist_mutex);
1429         mutex_init(&g2d->runqueue_mutex);
1430
1431         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1432         if (IS_ERR(g2d->gate_clk)) {
1433                 dev_err(dev, "failed to get gate clock\n");
1434                 ret = PTR_ERR(g2d->gate_clk);
1435                 goto err_destroy_workqueue;
1436         }
1437
1438         pm_runtime_enable(dev);
1439
1440         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1441
1442         g2d->regs = devm_ioremap_resource(dev, res);
1443         if (IS_ERR(g2d->regs)) {
1444                 ret = PTR_ERR(g2d->regs);
1445                 goto err_put_clk;
1446         }
1447
1448         g2d->irq = platform_get_irq(pdev, 0);
1449         if (g2d->irq < 0) {
1450                 dev_err(dev, "failed to get irq\n");
1451                 ret = g2d->irq;
1452                 goto err_put_clk;
1453         }
1454
1455         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1456                                                                 "drm_g2d", g2d);
1457         if (ret < 0) {
1458                 dev_err(dev, "irq request failed\n");
1459                 goto err_put_clk;
1460         }
1461
1462         g2d->max_pool = MAX_POOL;
1463
1464         platform_set_drvdata(pdev, g2d);
1465
1466         subdrv = &g2d->subdrv;
1467         subdrv->dev = dev;
1468         subdrv->probe = g2d_subdrv_probe;
1469         subdrv->remove = g2d_subdrv_remove;
1470         subdrv->open = g2d_open;
1471         subdrv->close = g2d_close;
1472
1473         ret = exynos_drm_subdrv_register(subdrv);
1474         if (ret < 0) {
1475                 dev_err(dev, "failed to register drm g2d device\n");
1476                 goto err_put_clk;
1477         }
1478
1479         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1480                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1481
1482         return 0;
1483
1484 err_put_clk:
1485         pm_runtime_disable(dev);
1486 err_destroy_workqueue:
1487         destroy_workqueue(g2d->g2d_workq);
1488 err_destroy_slab:
1489         kmem_cache_destroy(g2d->runqueue_slab);
1490         return ret;
1491 }
1492
1493 static int g2d_remove(struct platform_device *pdev)
1494 {
1495         struct g2d_data *g2d = platform_get_drvdata(pdev);
1496
1497         cancel_work_sync(&g2d->runqueue_work);
1498         exynos_drm_subdrv_unregister(&g2d->subdrv);
1499
1500         while (g2d->runqueue_node) {
1501                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1502                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1503         }
1504
1505         pm_runtime_disable(&pdev->dev);
1506
1507         g2d_fini_cmdlist(g2d);
1508         destroy_workqueue(g2d->g2d_workq);
1509         kmem_cache_destroy(g2d->runqueue_slab);
1510
1511         return 0;
1512 }
1513
1514 #ifdef CONFIG_PM_SLEEP
1515 static int g2d_suspend(struct device *dev)
1516 {
1517         struct g2d_data *g2d = dev_get_drvdata(dev);
1518
1519         mutex_lock(&g2d->runqueue_mutex);
1520         g2d->suspended = true;
1521         mutex_unlock(&g2d->runqueue_mutex);
1522
1523         while (g2d->runqueue_node)
1524                 /* FIXME: good range? */
1525                 usleep_range(500, 1000);
1526
1527         flush_work(&g2d->runqueue_work);
1528
1529         return 0;
1530 }
1531
1532 static int g2d_resume(struct device *dev)
1533 {
1534         struct g2d_data *g2d = dev_get_drvdata(dev);
1535
1536         g2d->suspended = false;
1537         g2d_exec_runqueue(g2d);
1538
1539         return 0;
1540 }
1541 #endif
1542
1543 #ifdef CONFIG_PM
1544 static int g2d_runtime_suspend(struct device *dev)
1545 {
1546         struct g2d_data *g2d = dev_get_drvdata(dev);
1547
1548         clk_disable_unprepare(g2d->gate_clk);
1549
1550         return 0;
1551 }
1552
1553 static int g2d_runtime_resume(struct device *dev)
1554 {
1555         struct g2d_data *g2d = dev_get_drvdata(dev);
1556         int ret;
1557
1558         ret = clk_prepare_enable(g2d->gate_clk);
1559         if (ret < 0)
1560                 dev_warn(dev, "failed to enable clock.\n");
1561
1562         return ret;
1563 }
1564 #endif
1565
1566 static const struct dev_pm_ops g2d_pm_ops = {
1567         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1568         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1569 };
1570
1571 static const struct of_device_id exynos_g2d_match[] = {
1572         { .compatible = "samsung,exynos5250-g2d" },
1573         { .compatible = "samsung,exynos4212-g2d" },
1574         {},
1575 };
1576 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1577
1578 struct platform_driver g2d_driver = {
1579         .probe          = g2d_probe,
1580         .remove         = g2d_remove,
1581         .driver         = {
1582                 .name   = "s5p-g2d",
1583                 .owner  = THIS_MODULE,
1584                 .pm     = &g2d_pm_ops,
1585                 .of_match_table = exynos_g2d_match,
1586         },
1587 };