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_STRIDE_REG              0x0308
  52 #define G2D_SRC_COLOR_MODE              0x030C
  53 #define G2D_SRC_LEFT_TOP                0x0310
  54 #define G2D_SRC_RIGHT_BOTTOM            0x0314
  55 #define G2D_SRC_PLANE2_BASE_ADDR        0x0318
  56 #define G2D_DST_BASE_ADDR               0x0404
  57 #define G2D_DST_STRIDE_REG              0x0408
  58 #define G2D_DST_COLOR_MODE              0x040C
  59 #define G2D_DST_LEFT_TOP                0x0410
  60 #define G2D_DST_RIGHT_BOTTOM            0x0414
  61 #define G2D_DST_PLANE2_BASE_ADDR        0x0418
  62 #define G2D_PAT_BASE_ADDR               0x0500
  63 #define G2D_MSK_BASE_ADDR               0x0520
  64
  65 /* G2D_SOFT_RESET */
  66 #define G2D_SFRCLEAR                    (1 << 1)
  67 #define G2D_R                           (1 << 0)
  68
  69 /* G2D_INTEN */
  70 #define G2D_INTEN_ACF                   (1 << 3)
  71 #define G2D_INTEN_UCF                   (1 << 2)
  72 #define G2D_INTEN_GCF                   (1 << 1)
  73 #define G2D_INTEN_SCF                   (1 << 0)
  74
  75 /* G2D_INTC_PEND */
  76 #define G2D_INTP_ACMD_FIN               (1 << 3)
  77 #define G2D_INTP_UCMD_FIN               (1 << 2)
  78 #define G2D_INTP_GCMD_FIN               (1 << 1)
  79 #define G2D_INTP_SCMD_FIN               (1 << 0)
  80
  81 /* G2D_DMA_COMMAND */
  82 #define G2D_DMA_HALT                    (1 << 2)
  83 #define G2D_DMA_CONTINUE                (1 << 1)
  84 #define G2D_DMA_START                   (1 << 0)
  85
  86 /* G2D_DMA_STATUS */
  87 #define G2D_DMA_LIST_DONE_COUNT         (0xFF << 17)
  88 #define G2D_DMA_BITBLT_DONE_COUNT       (0xFFFF << 1)
  89 #define G2D_DMA_DONE                    (1 << 0)
  90 #define G2D_DMA_LIST_DONE_COUNT_OFFSET  17
  91
  92 /* G2D_DMA_HOLD_CMD */
  93 #define G2D_USER_HOLD                   (1 << 2)
  94 #define G2D_LIST_HOLD                   (1 << 1)
  95 #define G2D_BITBLT_HOLD                 (1 << 0)
  96
  97 /* G2D_BITBLT_START */
  98 #define G2D_START_CASESEL               (1 << 2)
  99 #define G2D_START_NHOLT                 (1 << 1)
 100 #define G2D_START_BITBLT                (1 << 0)
 101
 102 /* buffer color format */
 103 #define G2D_FMT_XRGB8888                0
 104 #define G2D_FMT_ARGB8888                1
 105 #define G2D_FMT_RGB565                  2
 106 #define G2D_FMT_XRGB1555                3
 107 #define G2D_FMT_ARGB1555                4
 108 #define G2D_FMT_XRGB4444                5
 109 #define G2D_FMT_ARGB4444                6
 110 #define G2D_FMT_PACKED_RGB888           7
 111 #define G2D_FMT_A8                      11
 112 #define G2D_FMT_L8                      12
 113
 114 /* buffer valid length */
 115 #define G2D_LEN_MIN                     1
 116 #define G2D_LEN_MAX                     8000
 117
 118 #define G2D_CMDLIST_SIZE                (PAGE_SIZE / 4)
 119 #define G2D_CMDLIST_NUM                 64
 120 #define G2D_CMDLIST_POOL_SIZE           (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
 121 #define G2D_CMDLIST_DATA_NUM            (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
 122
 123 /* maximum buffer pool size of userptr is 64MB as default */
 124 #define MAX_POOL                (64 * 1024 * 1024)
 125
 126 enum {
 127         BUF_TYPE_GEM = 1,
 128         BUF_TYPE_USERPTR,
 129 };
 130
 131 enum g2d_reg_type {
 132         REG_TYPE_NONE = -1,
 133         REG_TYPE_SRC,
 134         REG_TYPE_SRC_PLANE2,
 135         REG_TYPE_DST,
 136         REG_TYPE_DST_PLANE2,
 137         REG_TYPE_PAT,
 138         REG_TYPE_MSK,
 139         MAX_REG_TYPE_NR
 140 };
 141
 142 /* cmdlist data structure */
 143 struct g2d_cmdlist {
 144         u32             head;
 145         unsigned long   data[G2D_CMDLIST_DATA_NUM];
 146         u32             last;   /* last data offset */
 147 };
 148
 149 /*
 150  * A structure of buffer description
 151  *
 152  * @format: color format
 153  * @stride: buffer stride/pitch in bytes
 154  * @left_x: the x coordinates of left top corner
 155  * @top_y: the y coordinates of left top corner
 156  * @right_x: the x coordinates of right bottom corner
 157  * @bottom_y: the y coordinates of right bottom corner
 158  *
 159  */
 160 struct g2d_buf_desc {
 161         unsigned int    format;
 162         unsigned int    stride;
 163         unsigned int    left_x;
 164         unsigned int    top_y;
 165         unsigned int    right_x;
 166         unsigned int    bottom_y;
 167 };
 168
 169 /*
 170  * A structure of buffer information
 171  *
 172  * @map_nr: manages the number of mapped buffers
 173  * @reg_types: stores regitster type in the order of requested command
 174  * @handles: stores buffer handle in its reg_type position
 175  * @types: stores buffer type in its reg_type position
 176  * @descs: stores buffer description in its reg_type position
 177  *
 178  */
 179 struct g2d_buf_info {
 180         unsigned int            map_nr;
 181         enum g2d_reg_type       reg_types[MAX_REG_TYPE_NR];
 182         unsigned long           handles[MAX_REG_TYPE_NR];
 183         unsigned int            types[MAX_REG_TYPE_NR];
 184         struct g2d_buf_desc     descs[MAX_REG_TYPE_NR];
 185 };
 186
 187 struct drm_exynos_pending_g2d_event {
 188         struct drm_pending_event        base;
 189         struct drm_exynos_g2d_event     event;
 190 };
 191
 192 struct g2d_cmdlist_userptr {
 193         struct list_head        list;
 194         dma_addr_t              dma_addr;
 195         unsigned long           userptr;
 196         unsigned long           size;
 197         struct frame_vector     *vec;
 198         struct sg_table         *sgt;
 199         atomic_t                refcount;
 200         bool                    in_pool;
 201         bool                    out_of_list;
 202 };
 203 struct g2d_cmdlist_node {
 204         struct list_head        list;
 205         struct g2d_cmdlist      *cmdlist;
 206         dma_addr_t              dma_addr;
 207         struct g2d_buf_info     buf_info;
 208
 209         struct drm_exynos_pending_g2d_event     *event;
 210 };
 211
 212 struct g2d_runqueue_node {
 213         struct list_head        list;
 214         struct list_head        run_cmdlist;
 215         struct list_head        event_list;
 216         struct drm_file         *filp;
 217         pid_t                   pid;
 218         struct completion       complete;
 219         int                     async;
 220 };
 221
 222 struct g2d_data {
 223         struct device                   *dev;
 224         struct clk                      *gate_clk;
 225         void __iomem                    *regs;
 226         int                             irq;
 227         struct workqueue_struct         *g2d_workq;
 228         struct work_struct              runqueue_work;
 229         struct exynos_drm_subdrv        subdrv;
 230         bool                            suspended;
 231
 232         /* cmdlist */
 233         struct g2d_cmdlist_node         *cmdlist_node;
 234         struct list_head                free_cmdlist;
 235         struct mutex                    cmdlist_mutex;
 236         dma_addr_t                      cmdlist_pool;
 237         void                            *cmdlist_pool_virt;
 238         struct dma_attrs                cmdlist_dma_attrs;
 239
 240         /* runqueue*/
 241         struct g2d_runqueue_node        *runqueue_node;
 242         struct list_head                runqueue;
 243         struct mutex                    runqueue_mutex;
 244         struct kmem_cache               *runqueue_slab;
 245
 246         unsigned long                   current_pool;
 247         unsigned long                   max_pool;
 248 };
 249
 250 static int g2d_init_cmdlist(struct g2d_data *g2d)
 251 {
 252         struct device *dev = g2d->dev;
 253         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
 254         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 255         int nr;
 256         int ret;
 257         struct g2d_buf_info *buf_info;
 258
 259         init_dma_attrs(&g2d->cmdlist_dma_attrs);
 260         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
 261
 262         g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
 263                                                 G2D_CMDLIST_POOL_SIZE,
 264                                                 &g2d->cmdlist_pool, GFP_KERNEL,
 265                                                 &g2d->cmdlist_dma_attrs);
 266         if (!g2d->cmdlist_pool_virt) {
 267                 dev_err(dev, "failed to allocate dma memory\n");
 268                 return -ENOMEM;
 269         }
 270
 271         node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
 272         if (!node) {
 273                 dev_err(dev, "failed to allocate memory\n");
 274                 ret = -ENOMEM;
 275                 goto err;
 276         }
 277
 278         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
 279                 unsigned int i;
 280
 281                 node[nr].cmdlist =
 282                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
 283                 node[nr].dma_addr =
 284                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
 285
 286                 buf_info = &node[nr].buf_info;
 287                 for (i = 0; i < MAX_REG_TYPE_NR; i++)
 288                         buf_info->reg_types[i] = REG_TYPE_NONE;
 289
 290                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
 291         }
 292
 293         return 0;
 294
 295 err:
 296         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 297                         g2d->cmdlist_pool_virt,
 298                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 299         return ret;
 300 }
 301
 302 static void g2d_fini_cmdlist(struct g2d_data *g2d)
 303 {
 304         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 305
 306         kfree(g2d->cmdlist_node);
 307
 308         if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
 309                 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
 310                                 g2d->cmdlist_pool_virt,
 311                                 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 312         }
 313 }
 314
 315 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 316 {
 317         struct device *dev = g2d->dev;
 318         struct g2d_cmdlist_node *node;
 319
 320         mutex_lock(&g2d->cmdlist_mutex);
 321         if (list_empty(&g2d->free_cmdlist)) {
 322                 dev_err(dev, "there is no free cmdlist\n");
 323                 mutex_unlock(&g2d->cmdlist_mutex);
 324                 return NULL;
 325         }
 326
 327         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 328                                 list);
 329         list_del_init(&node->list);
 330         mutex_unlock(&g2d->cmdlist_mutex);
 331
 332         return node;
 333 }
 334
 335 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 336 {
 337         mutex_lock(&g2d->cmdlist_mutex);
 338         list_move_tail(&node->list, &g2d->free_cmdlist);
 339         mutex_unlock(&g2d->cmdlist_mutex);
 340 }
 341
 342 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 343                                      struct g2d_cmdlist_node *node)
 344 {
 345         struct g2d_cmdlist_node *lnode;
 346
 347         if (list_empty(&g2d_priv->inuse_cmdlist))
 348                 goto add_to_list;
 349
 350         /* this links to base address of new cmdlist */
 351         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 352                                 struct g2d_cmdlist_node, list);
 353         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 354
 355 add_to_list:
 356         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 357
 358         if (node->event)
 359                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 360 }
 361
 362 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 363                                         unsigned long obj,
 364                                         bool force)
 365 {
 366         struct g2d_cmdlist_userptr *g2d_userptr =
 367                                         (struct g2d_cmdlist_userptr *)obj;
 368         struct page **pages;
 369
 370         if (!obj)
 371                 return;
 372
 373         if (force)
 374                 goto out;
 375
 376         atomic_dec(&g2d_userptr->refcount);
 377
 378         if (atomic_read(&g2d_userptr->refcount) > 0)
 379                 return;
 380
 381         if (g2d_userptr->in_pool)
 382                 return;
 383
 384 out:
 385         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
 386                                         DMA_BIDIRECTIONAL);
 387
 388         pages = frame_vector_pages(g2d_userptr->vec);
 389         if (!IS_ERR(pages)) {
 390                 int i;
 391
 392                 for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++)
 393                         set_page_dirty_lock(pages[i]);
 394         }
 395         put_vaddr_frames(g2d_userptr->vec);
 396         frame_vector_destroy(g2d_userptr->vec);
 397
 398         if (!g2d_userptr->out_of_list)
 399                 list_del_init(&g2d_userptr->list);
 400
 401         sg_free_table(g2d_userptr->sgt);
 402         kfree(g2d_userptr->sgt);
 403         kfree(g2d_userptr);
 404 }
 405
 406 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 407                                         unsigned long userptr,
 408                                         unsigned long size,
 409                                         struct drm_file *filp,
 410                                         unsigned long *obj)
 411 {
 412         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 413         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 414         struct g2d_cmdlist_userptr *g2d_userptr;
 415         struct g2d_data *g2d;
 416         struct sg_table *sgt;
 417         unsigned long start, end;
 418         unsigned int npages, offset;
 419         int ret;
 420
 421         if (!size) {
 422                 DRM_ERROR("invalid userptr size.\n");
 423                 return ERR_PTR(-EINVAL);
 424         }
 425
 426         g2d = dev_get_drvdata(g2d_priv->dev);
 427
 428         /* check if userptr already exists in userptr_list. */
 429         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 430                 if (g2d_userptr->userptr == userptr) {
 431                         /*
 432                          * also check size because there could be same address
 433                          * and different size.
 434                          */
 435                         if (g2d_userptr->size == size) {
 436                                 atomic_inc(&g2d_userptr->refcount);
 437                                 *obj = (unsigned long)g2d_userptr;
 438
 439                                 return &g2d_userptr->dma_addr;
 440                         }
 441
 442                         /*
 443                          * at this moment, maybe g2d dma is accessing this
 444                          * g2d_userptr memory region so just remove this
 445                          * g2d_userptr object from userptr_list not to be
 446                          * referred again and also except it the userptr
 447                          * pool to be released after the dma access completion.
 448                          */
 449                         g2d_userptr->out_of_list = true;
 450                         g2d_userptr->in_pool = false;
 451                         list_del_init(&g2d_userptr->list);
 452
 453                         break;
 454                 }
 455         }
 456
 457         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 458         if (!g2d_userptr)
 459                 return ERR_PTR(-ENOMEM);
 460
 461         atomic_set(&g2d_userptr->refcount, 1);
 462         g2d_userptr->size = size;
 463
 464         start = userptr & PAGE_MASK;
 465         offset = userptr & ~PAGE_MASK;
 466         end = PAGE_ALIGN(userptr + size);
 467         npages = (end - start) >> PAGE_SHIFT;
 468         g2d_userptr->vec = frame_vector_create(npages);
 469         if (!g2d_userptr->vec) {
 470                 ret = -ENOMEM;
 471                 goto err_free;
 472         }
 473
 474         ret = get_vaddr_frames(start, npages, true, true, g2d_userptr->vec);
 475         if (ret != npages) {
 476                 DRM_ERROR("failed to get user pages from userptr.\n");
 477                 if (ret < 0)
 478                         goto err_destroy_framevec;
 479                 ret = -EFAULT;
 480                 goto err_put_framevec;
 481         }
 482         if (frame_vector_to_pages(g2d_userptr->vec) < 0) {
 483                 ret = -EFAULT;
 484                 goto err_put_framevec;
 485         }
 486
 487         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 488         if (!sgt) {
 489                 ret = -ENOMEM;
 490                 goto err_put_framevec;
 491         }
 492
 493         ret = sg_alloc_table_from_pages(sgt,
 494                                         frame_vector_pages(g2d_userptr->vec),
 495                                         npages, offset, size, GFP_KERNEL);
 496         if (ret < 0) {
 497                 DRM_ERROR("failed to get sgt from pages.\n");
 498                 goto err_free_sgt;
 499         }
 500
 501         g2d_userptr->sgt = sgt;
 502
 503         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
 504                                                 DMA_BIDIRECTIONAL);
 505         if (ret < 0) {
 506                 DRM_ERROR("failed to map sgt with dma region.\n");
 507                 goto err_sg_free_table;
 508         }
 509
 510         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 511         g2d_userptr->userptr = userptr;
 512
 513         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 514
 515         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 516                 g2d->current_pool += npages << PAGE_SHIFT;
 517                 g2d_userptr->in_pool = true;
 518         }
 519
 520         *obj = (unsigned long)g2d_userptr;
 521
 522         return &g2d_userptr->dma_addr;
 523
 524 err_sg_free_table:
 525         sg_free_table(sgt);
 526
 527 err_free_sgt:
 528         kfree(sgt);
 529
 530 err_put_framevec:
 531         put_vaddr_frames(g2d_userptr->vec);
 532
 533 err_destroy_framevec:
 534         frame_vector_destroy(g2d_userptr->vec);
 535
 536 err_free:
 537         kfree(g2d_userptr);
 538
 539         return ERR_PTR(ret);
 540 }
 541
 542 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 543                                         struct g2d_data *g2d,
 544                                         struct drm_file *filp)
 545 {
 546         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 547         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 548         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 549
 550         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 551                 if (g2d_userptr->in_pool)
 552                         g2d_userptr_put_dma_addr(drm_dev,
 553                                                 (unsigned long)g2d_userptr,
 554                                                 true);
 555
 556         g2d->current_pool = 0;
 557 }
 558
 559 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 560 {
 561         enum g2d_reg_type reg_type;
 562
 563         switch (reg_offset) {
 564         case G2D_SRC_BASE_ADDR:
 565         case G2D_SRC_STRIDE_REG:
 566         case G2D_SRC_COLOR_MODE:
 567         case G2D_SRC_LEFT_TOP:
 568         case G2D_SRC_RIGHT_BOTTOM:
 569                 reg_type = REG_TYPE_SRC;
 570                 break;
 571         case G2D_SRC_PLANE2_BASE_ADDR:
 572                 reg_type = REG_TYPE_SRC_PLANE2;
 573                 break;
 574         case G2D_DST_BASE_ADDR:
 575         case G2D_DST_STRIDE_REG:
 576         case G2D_DST_COLOR_MODE:
 577         case G2D_DST_LEFT_TOP:
 578         case G2D_DST_RIGHT_BOTTOM:
 579                 reg_type = REG_TYPE_DST;
 580                 break;
 581         case G2D_DST_PLANE2_BASE_ADDR:
 582                 reg_type = REG_TYPE_DST_PLANE2;
 583                 break;
 584         case G2D_PAT_BASE_ADDR:
 585                 reg_type = REG_TYPE_PAT;
 586                 break;
 587         case G2D_MSK_BASE_ADDR:
 588                 reg_type = REG_TYPE_MSK;
 589                 break;
 590         default:
 591                 reg_type = REG_TYPE_NONE;
 592                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 593                 break;
 594         }
 595
 596         return reg_type;
 597 }
 598
 599 static unsigned long g2d_get_buf_bpp(unsigned int format)
 600 {
 601         unsigned long bpp;
 602
 603         switch (format) {
 604         case G2D_FMT_XRGB8888:
 605         case G2D_FMT_ARGB8888:
 606                 bpp = 4;
 607                 break;
 608         case G2D_FMT_RGB565:
 609         case G2D_FMT_XRGB1555:
 610         case G2D_FMT_ARGB1555:
 611         case G2D_FMT_XRGB4444:
 612         case G2D_FMT_ARGB4444:
 613                 bpp = 2;
 614                 break;
 615         case G2D_FMT_PACKED_RGB888:
 616                 bpp = 3;
 617                 break;
 618         default:
 619                 bpp = 1;
 620                 break;
 621         }
 622
 623         return bpp;
 624 }
 625
 626 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 627                                                 enum g2d_reg_type reg_type,
 628                                                 unsigned long size)
 629 {
 630         int width, height;
 631         unsigned long bpp, last_pos;
 632
 633         /*
 634          * check source and destination buffers only.
 635          * so the others are always valid.
 636          */
 637         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 638                 return true;
 639
 640         /* This check also makes sure that right_x > left_x. */
 641         width = (int)buf_desc->right_x - (int)buf_desc->left_x;
 642         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 643                 DRM_ERROR("width[%d] is out of range!\n", width);
 644                 return false;
 645         }
 646
 647         /* This check also makes sure that bottom_y > top_y. */
 648         height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
 649         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 650                 DRM_ERROR("height[%d] is out of range!\n", height);
 651                 return false;
 652         }
 653
 654         bpp = g2d_get_buf_bpp(buf_desc->format);
 655
 656         /* Compute the position of the last byte that the engine accesses. */
 657         last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
 658                 (unsigned long)buf_desc->stride +
 659                 (unsigned long)buf_desc->right_x * bpp - 1;
 660
 661         /*
 662          * Since right_x > left_x and bottom_y > top_y we already know
 663          * that the first_pos < last_pos (first_pos being the position
 664          * of the first byte the engine accesses), it just remains to
 665          * check if last_pos is smaller then the buffer size.
 666          */
 667
 668         if (last_pos >= size) {
 669                 DRM_ERROR("last engine access position [%lu] "
 670                         "is out of range [%lu]!\n", last_pos, size);
 671                 return false;
 672         }
 673
 674         return true;
 675 }
 676
 677 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 678                                 struct g2d_cmdlist_node *node,
 679                                 struct drm_device *drm_dev,
 680                                 struct drm_file *file)
 681 {
 682         struct g2d_cmdlist *cmdlist = node->cmdlist;
 683         struct g2d_buf_info *buf_info = &node->buf_info;
 684         int offset;
 685         int ret;
 686         int i;
 687
 688         for (i = 0; i < buf_info->map_nr; i++) {
 689                 struct g2d_buf_desc *buf_desc;
 690                 enum g2d_reg_type reg_type;
 691                 int reg_pos;
 692                 unsigned long handle;
 693                 dma_addr_t *addr;
 694
 695                 reg_pos = cmdlist->last - 2 * (i + 1);
 696
 697                 offset = cmdlist->data[reg_pos];
 698                 handle = cmdlist->data[reg_pos + 1];
 699
 700                 reg_type = g2d_get_reg_type(offset);
 701                 if (reg_type == REG_TYPE_NONE) {
 702                         ret = -EFAULT;
 703                         goto err;
 704                 }
 705
 706                 buf_desc = &buf_info->descs[reg_type];
 707
 708                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 709                         unsigned long size;
 710
 711                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 712                         if (!size) {
 713                                 ret = -EFAULT;
 714                                 goto err;
 715                         }
 716
 717                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 718                                                                         size)) {
 719                                 ret = -EFAULT;
 720                                 goto err;
 721                         }
 722
 723                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 724                                                                 file);
 725                         if (IS_ERR(addr)) {
 726                                 ret = -EFAULT;
 727                                 goto err;
 728                         }
 729                 } else {
 730                         struct drm_exynos_g2d_userptr g2d_userptr;
 731
 732                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 733                                 sizeof(struct drm_exynos_g2d_userptr))) {
 734                                 ret = -EFAULT;
 735                                 goto err;
 736                         }
 737
 738                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 739                                                         g2d_userptr.size)) {
 740                                 ret = -EFAULT;
 741                                 goto err;
 742                         }
 743
 744                         addr = g2d_userptr_get_dma_addr(drm_dev,
 745                                                         g2d_userptr.userptr,
 746                                                         g2d_userptr.size,
 747                                                         file,
 748                                                         &handle);
 749                         if (IS_ERR(addr)) {
 750                                 ret = -EFAULT;
 751                                 goto err;
 752                         }
 753                 }
 754
 755                 cmdlist->data[reg_pos + 1] = *addr;
 756                 buf_info->reg_types[i] = reg_type;
 757                 buf_info->handles[reg_type] = handle;
 758         }
 759
 760         return 0;
 761
 762 err:
 763         buf_info->map_nr = i;
 764         return ret;
 765 }
 766
 767 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 768                                   struct g2d_cmdlist_node *node,
 769                                   struct drm_file *filp)
 770 {
 771         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 772         struct g2d_buf_info *buf_info = &node->buf_info;
 773         int i;
 774
 775         for (i = 0; i < buf_info->map_nr; i++) {
 776                 struct g2d_buf_desc *buf_desc;
 777                 enum g2d_reg_type reg_type;
 778                 unsigned long handle;
 779
 780                 reg_type = buf_info->reg_types[i];
 781
 782                 buf_desc = &buf_info->descs[reg_type];
 783                 handle = buf_info->handles[reg_type];
 784
 785                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 786                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 787                                                         filp);
 788                 else
 789                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 790                                                         false);
 791
 792                 buf_info->reg_types[i] = REG_TYPE_NONE;
 793                 buf_info->handles[reg_type] = 0;
 794                 buf_info->types[reg_type] = 0;
 795                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 796         }
 797
 798         buf_info->map_nr = 0;
 799 }
 800
 801 static void g2d_dma_start(struct g2d_data *g2d,
 802                           struct g2d_runqueue_node *runqueue_node)
 803 {
 804         struct g2d_cmdlist_node *node =
 805                                 list_first_entry(&runqueue_node->run_cmdlist,
 806                                                 struct g2d_cmdlist_node, list);
 807         int ret;
 808
 809         ret = pm_runtime_get_sync(g2d->dev);
 810         if (ret < 0)
 811                 return;
 812
 813         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 814         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 815 }
 816
 817 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 818 {
 819         struct g2d_runqueue_node *runqueue_node;
 820
 821         if (list_empty(&g2d->runqueue))
 822                 return NULL;
 823
 824         runqueue_node = list_first_entry(&g2d->runqueue,
 825                                          struct g2d_runqueue_node, list);
 826         list_del_init(&runqueue_node->list);
 827         return runqueue_node;
 828 }
 829
 830 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 831                                    struct g2d_runqueue_node *runqueue_node)
 832 {
 833         struct g2d_cmdlist_node *node;
 834
 835         if (!runqueue_node)
 836                 return;
 837
 838         mutex_lock(&g2d->cmdlist_mutex);
 839         /*
 840          * commands in run_cmdlist have been completed so unmap all gem
 841          * objects in each command node so that they are unreferenced.
 842          */
 843         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 844                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 845         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 846         mutex_unlock(&g2d->cmdlist_mutex);
 847
 848         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 849 }
 850
 851 static void g2d_exec_runqueue(struct g2d_data *g2d)
 852 {
 853         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 854         if (g2d->runqueue_node)
 855                 g2d_dma_start(g2d, g2d->runqueue_node);
 856 }
 857
 858 static void g2d_runqueue_worker(struct work_struct *work)
 859 {
 860         struct g2d_data *g2d = container_of(work, struct g2d_data,
 861                                             runqueue_work);
 862
 863         mutex_lock(&g2d->runqueue_mutex);
 864         pm_runtime_put_sync(g2d->dev);
 865
 866         complete(&g2d->runqueue_node->complete);
 867         if (g2d->runqueue_node->async)
 868                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 869
 870         if (g2d->suspended)
 871                 g2d->runqueue_node = NULL;
 872         else
 873                 g2d_exec_runqueue(g2d);
 874         mutex_unlock(&g2d->runqueue_mutex);
 875 }
 876
 877 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 878 {
 879         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 880         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 881         struct drm_exynos_pending_g2d_event *e;
 882         struct timeval now;
 883         unsigned long flags;
 884
 885         if (list_empty(&runqueue_node->event_list))
 886                 return;
 887
 888         e = list_first_entry(&runqueue_node->event_list,
 889                              struct drm_exynos_pending_g2d_event, base.link);
 890
 891         do_gettimeofday(&now);
 892         e->event.tv_sec = now.tv_sec;
 893         e->event.tv_usec = now.tv_usec;
 894         e->event.cmdlist_no = cmdlist_no;
 895
 896         spin_lock_irqsave(&drm_dev->event_lock, flags);
 897         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 898         wake_up_interruptible(&e->base.file_priv->event_wait);
 899         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 900 }
 901
 902 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 903 {
 904         struct g2d_data *g2d = dev_id;
 905         u32 pending;
 906
 907         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 908         if (pending)
 909                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 910
 911         if (pending & G2D_INTP_GCMD_FIN) {
 912                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 913
 914                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 915                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 916
 917                 g2d_finish_event(g2d, cmdlist_no);
 918
 919                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 920                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 921                         writel_relaxed(G2D_DMA_CONTINUE,
 922                                         g2d->regs + G2D_DMA_COMMAND);
 923                 }
 924         }
 925
 926         if (pending & G2D_INTP_ACMD_FIN)
 927                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 928
 929         return IRQ_HANDLED;
 930 }
 931
 932 static int g2d_check_reg_offset(struct device *dev,
 933                                 struct g2d_cmdlist_node *node,
 934                                 int nr, bool for_addr)
 935 {
 936         struct g2d_cmdlist *cmdlist = node->cmdlist;
 937         int reg_offset;
 938         int index;
 939         int i;
 940
 941         for (i = 0; i < nr; i++) {
 942                 struct g2d_buf_info *buf_info = &node->buf_info;
 943                 struct g2d_buf_desc *buf_desc;
 944                 enum g2d_reg_type reg_type;
 945                 unsigned long value;
 946
 947                 index = cmdlist->last - 2 * (i + 1);
 948
 949                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 950                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 951                         goto err;
 952                 if (reg_offset % 4)
 953                         goto err;
 954
 955                 switch (reg_offset) {
 956                 case G2D_SRC_BASE_ADDR:
 957                 case G2D_SRC_PLANE2_BASE_ADDR:
 958                 case G2D_DST_BASE_ADDR:
 959                 case G2D_DST_PLANE2_BASE_ADDR:
 960                 case G2D_PAT_BASE_ADDR:
 961                 case G2D_MSK_BASE_ADDR:
 962                         if (!for_addr)
 963                                 goto err;
 964
 965                         reg_type = g2d_get_reg_type(reg_offset);
 966
 967                         /* check userptr buffer type. */
 968                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 969                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 970                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 971                         } else
 972                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 973                         break;
 974                 case G2D_SRC_STRIDE_REG:
 975                 case G2D_DST_STRIDE_REG:
 976                         if (for_addr)
 977                                 goto err;
 978
 979                         reg_type = g2d_get_reg_type(reg_offset);
 980
 981                         buf_desc = &buf_info->descs[reg_type];
 982                         buf_desc->stride = cmdlist->data[index + 1];
 983                         break;
 984                 case G2D_SRC_COLOR_MODE:
 985                 case G2D_DST_COLOR_MODE:
 986                         if (for_addr)
 987                                 goto err;
 988
 989                         reg_type = g2d_get_reg_type(reg_offset);
 990
 991                         buf_desc = &buf_info->descs[reg_type];
 992                         value = cmdlist->data[index + 1];
 993
 994                         buf_desc->format = value & 0xf;
 995                         break;
 996                 case G2D_SRC_LEFT_TOP:
 997                 case G2D_DST_LEFT_TOP:
 998                         if (for_addr)
 999                                 goto err;
1000
1001                         reg_type = g2d_get_reg_type(reg_offset);
1002
1003                         buf_desc = &buf_info->descs[reg_type];
1004                         value = cmdlist->data[index + 1];
1005
1006                         buf_desc->left_x = value & 0x1fff;
1007                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1008                         break;
1009                 case G2D_SRC_RIGHT_BOTTOM:
1010                 case G2D_DST_RIGHT_BOTTOM:
1011                         if (for_addr)
1012                                 goto err;
1013
1014                         reg_type = g2d_get_reg_type(reg_offset);
1015
1016                         buf_desc = &buf_info->descs[reg_type];
1017                         value = cmdlist->data[index + 1];
1018
1019                         buf_desc->right_x = value & 0x1fff;
1020                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1021                         break;
1022                 default:
1023                         if (for_addr)
1024                                 goto err;
1025                         break;
1026                 }
1027         }
1028
1029         return 0;
1030
1031 err:
1032         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1033         return -EINVAL;
1034 }
1035
1036 /* ioctl functions */
1037 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1038                              struct drm_file *file)
1039 {
1040         struct drm_exynos_file_private *file_priv = file->driver_priv;
1041         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1042         struct device *dev;
1043         struct g2d_data *g2d;
1044         struct drm_exynos_g2d_get_ver *ver = data;
1045
1046         if (!g2d_priv)
1047                 return -ENODEV;
1048
1049         dev = g2d_priv->dev;
1050         if (!dev)
1051                 return -ENODEV;
1052
1053         g2d = dev_get_drvdata(dev);
1054         if (!g2d)
1055                 return -EFAULT;
1056
1057         ver->major = G2D_HW_MAJOR_VER;
1058         ver->minor = G2D_HW_MINOR_VER;
1059
1060         return 0;
1061 }
1062 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1063
1064 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1065                                  struct drm_file *file)
1066 {
1067         struct drm_exynos_file_private *file_priv = file->driver_priv;
1068         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1069         struct device *dev;
1070         struct g2d_data *g2d;
1071         struct drm_exynos_g2d_set_cmdlist *req = data;
1072         struct drm_exynos_g2d_cmd *cmd;
1073         struct drm_exynos_pending_g2d_event *e;
1074         struct g2d_cmdlist_node *node;
1075         struct g2d_cmdlist *cmdlist;
1076         unsigned long flags;
1077         int size;
1078         int ret;
1079
1080         if (!g2d_priv)
1081                 return -ENODEV;
1082
1083         dev = g2d_priv->dev;
1084         if (!dev)
1085                 return -ENODEV;
1086
1087         g2d = dev_get_drvdata(dev);
1088         if (!g2d)
1089                 return -EFAULT;
1090
1091         node = g2d_get_cmdlist(g2d);
1092         if (!node)
1093                 return -ENOMEM;
1094
1095         node->event = NULL;
1096
1097         if (req->event_type != G2D_EVENT_NOT) {
1098                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1099                 if (file->event_space < sizeof(e->event)) {
1100                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1101                         ret = -ENOMEM;
1102                         goto err;
1103                 }
1104                 file->event_space -= sizeof(e->event);
1105                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1106
1107                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1108                 if (!e) {
1109                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1110                         file->event_space += sizeof(e->event);
1111                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1112
1113                         ret = -ENOMEM;
1114                         goto err;
1115                 }
1116
1117                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1118                 e->event.base.length = sizeof(e->event);
1119                 e->event.user_data = req->user_data;
1120                 e->base.event = &e->event.base;
1121                 e->base.file_priv = file;
1122                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1123
1124                 node->event = e;
1125         }
1126
1127         cmdlist = node->cmdlist;
1128
1129         cmdlist->last = 0;
1130
1131         /*
1132          * If don't clear SFR registers, the cmdlist is affected by register
1133          * values of previous cmdlist. G2D hw executes SFR clear command and
1134          * a next command at the same time then the next command is ignored and
1135          * is executed rightly from next next command, so needs a dummy command
1136          * to next command of SFR clear command.
1137          */
1138         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1139         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1140         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1141         cmdlist->data[cmdlist->last++] = 0;
1142
1143         /*
1144          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1145          * and GCF bit should be set to INTEN register if user wants
1146          * G2D interrupt event once current command list execution is
1147          * finished.
1148          * Otherwise only ACF bit should be set to INTEN register so
1149          * that one interrupt is occurred after all command lists
1150          * have been completed.
1151          */
1152         if (node->event) {
1153                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1154                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1155                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1156                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1157         } else {
1158                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1159                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1160         }
1161
1162         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1163         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1164         if (size > G2D_CMDLIST_DATA_NUM) {
1165                 dev_err(dev, "cmdlist size is too big\n");
1166                 ret = -EINVAL;
1167                 goto err_free_event;
1168         }
1169
1170         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1171
1172         if (copy_from_user(cmdlist->data + cmdlist->last,
1173                                 (void __user *)cmd,
1174                                 sizeof(*cmd) * req->cmd_nr)) {
1175                 ret = -EFAULT;
1176                 goto err_free_event;
1177         }
1178         cmdlist->last += req->cmd_nr * 2;
1179
1180         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1181         if (ret < 0)
1182                 goto err_free_event;
1183
1184         node->buf_info.map_nr = req->cmd_buf_nr;
1185         if (req->cmd_buf_nr) {
1186                 struct drm_exynos_g2d_cmd *cmd_buf;
1187
1188                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1189
1190                 if (copy_from_user(cmdlist->data + cmdlist->last,
1191                                         (void __user *)cmd_buf,
1192                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1193                         ret = -EFAULT;
1194                         goto err_free_event;
1195                 }
1196                 cmdlist->last += req->cmd_buf_nr * 2;
1197
1198                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1199                 if (ret < 0)
1200                         goto err_free_event;
1201
1202                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1203                 if (ret < 0)
1204                         goto err_unmap;
1205         }
1206
1207         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1208         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1209
1210         /* head */
1211         cmdlist->head = cmdlist->last / 2;
1212
1213         /* tail */
1214         cmdlist->data[cmdlist->last] = 0;
1215
1216         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1217
1218         return 0;
1219
1220 err_unmap:
1221         g2d_unmap_cmdlist_gem(g2d, node, file);
1222 err_free_event:
1223         if (node->event) {
1224                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1225                 file->event_space += sizeof(e->event);
1226                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1227                 kfree(node->event);
1228         }
1229 err:
1230         g2d_put_cmdlist(g2d, node);
1231         return ret;
1232 }
1233 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1234
1235 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1236                           struct drm_file *file)
1237 {
1238         struct drm_exynos_file_private *file_priv = file->driver_priv;
1239         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1240         struct device *dev;
1241         struct g2d_data *g2d;
1242         struct drm_exynos_g2d_exec *req = data;
1243         struct g2d_runqueue_node *runqueue_node;
1244         struct list_head *run_cmdlist;
1245         struct list_head *event_list;
1246
1247         if (!g2d_priv)
1248                 return -ENODEV;
1249
1250         dev = g2d_priv->dev;
1251         if (!dev)
1252                 return -ENODEV;
1253
1254         g2d = dev_get_drvdata(dev);
1255         if (!g2d)
1256                 return -EFAULT;
1257
1258         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1259         if (!runqueue_node) {
1260                 dev_err(dev, "failed to allocate memory\n");
1261                 return -ENOMEM;
1262         }
1263         run_cmdlist = &runqueue_node->run_cmdlist;
1264         event_list = &runqueue_node->event_list;
1265         INIT_LIST_HEAD(run_cmdlist);
1266         INIT_LIST_HEAD(event_list);
1267         init_completion(&runqueue_node->complete);
1268         runqueue_node->async = req->async;
1269
1270         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1271         list_splice_init(&g2d_priv->event_list, event_list);
1272
1273         if (list_empty(run_cmdlist)) {
1274                 dev_err(dev, "there is no inuse cmdlist\n");
1275                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1276                 return -EPERM;
1277         }
1278
1279         mutex_lock(&g2d->runqueue_mutex);
1280         runqueue_node->pid = current->pid;
1281         runqueue_node->filp = file;
1282         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1283         if (!g2d->runqueue_node)
1284                 g2d_exec_runqueue(g2d);
1285         mutex_unlock(&g2d->runqueue_mutex);
1286
1287         if (runqueue_node->async)
1288                 goto out;
1289
1290         wait_for_completion(&runqueue_node->complete);
1291         g2d_free_runqueue_node(g2d, runqueue_node);
1292
1293 out:
1294         return 0;
1295 }
1296 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1297
1298 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1299 {
1300         struct g2d_data *g2d;
1301         int ret;
1302
1303         g2d = dev_get_drvdata(dev);
1304         if (!g2d)
1305                 return -EFAULT;
1306
1307         /* allocate dma-aware cmdlist buffer. */
1308         ret = g2d_init_cmdlist(g2d);
1309         if (ret < 0) {
1310                 dev_err(dev, "cmdlist init failed\n");
1311                 return ret;
1312         }
1313
1314         ret = drm_iommu_attach_device(drm_dev, dev);
1315         if (ret < 0) {
1316                 dev_err(dev, "failed to enable iommu.\n");
1317                 g2d_fini_cmdlist(g2d);
1318         }
1319
1320         return ret;
1321
1322 }
1323
1324 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1325 {
1326         drm_iommu_detach_device(drm_dev, dev);
1327 }
1328
1329 static int g2d_open(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;
1334
1335         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1336         if (!g2d_priv)
1337                 return -ENOMEM;
1338
1339         g2d_priv->dev = dev;
1340         file_priv->g2d_priv = g2d_priv;
1341
1342         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1343         INIT_LIST_HEAD(&g2d_priv->event_list);
1344         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1345
1346         return 0;
1347 }
1348
1349 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1350                         struct drm_file *file)
1351 {
1352         struct drm_exynos_file_private *file_priv = file->driver_priv;
1353         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1354         struct g2d_data *g2d;
1355         struct g2d_cmdlist_node *node, *n;
1356
1357         if (!dev)
1358                 return;
1359
1360         g2d = dev_get_drvdata(dev);
1361         if (!g2d)
1362                 return;
1363
1364         mutex_lock(&g2d->cmdlist_mutex);
1365         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1366                 /*
1367                  * unmap all gem objects not completed.
1368                  *
1369                  * P.S. if current process was terminated forcely then
1370                  * there may be some commands in inuse_cmdlist so unmap
1371                  * them.
1372                  */
1373                 g2d_unmap_cmdlist_gem(g2d, node, file);
1374                 list_move_tail(&node->list, &g2d->free_cmdlist);
1375         }
1376         mutex_unlock(&g2d->cmdlist_mutex);
1377
1378         /* release all g2d_userptr in pool. */
1379         g2d_userptr_free_all(drm_dev, g2d, file);
1380
1381         kfree(file_priv->g2d_priv);
1382 }
1383
1384 static int g2d_probe(struct platform_device *pdev)
1385 {
1386         struct device *dev = &pdev->dev;
1387         struct resource *res;
1388         struct g2d_data *g2d;
1389         struct exynos_drm_subdrv *subdrv;
1390         int ret;
1391
1392         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1393         if (!g2d)
1394                 return -ENOMEM;
1395
1396         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1397                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1398         if (!g2d->runqueue_slab)
1399                 return -ENOMEM;
1400
1401         g2d->dev = dev;
1402
1403         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1404         if (!g2d->g2d_workq) {
1405                 dev_err(dev, "failed to create workqueue\n");
1406                 ret = -EINVAL;
1407                 goto err_destroy_slab;
1408         }
1409
1410         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1411         INIT_LIST_HEAD(&g2d->free_cmdlist);
1412         INIT_LIST_HEAD(&g2d->runqueue);
1413
1414         mutex_init(&g2d->cmdlist_mutex);
1415         mutex_init(&g2d->runqueue_mutex);
1416
1417         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1418         if (IS_ERR(g2d->gate_clk)) {
1419                 dev_err(dev, "failed to get gate clock\n");
1420                 ret = PTR_ERR(g2d->gate_clk);
1421                 goto err_destroy_workqueue;
1422         }
1423
1424         pm_runtime_enable(dev);
1425
1426         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1427
1428         g2d->regs = devm_ioremap_resource(dev, res);
1429         if (IS_ERR(g2d->regs)) {
1430                 ret = PTR_ERR(g2d->regs);
1431                 goto err_put_clk;
1432         }
1433
1434         g2d->irq = platform_get_irq(pdev, 0);
1435         if (g2d->irq < 0) {
1436                 dev_err(dev, "failed to get irq\n");
1437                 ret = g2d->irq;
1438                 goto err_put_clk;
1439         }
1440
1441         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1442                                                                 "drm_g2d", g2d);
1443         if (ret < 0) {
1444                 dev_err(dev, "irq request failed\n");
1445                 goto err_put_clk;
1446         }
1447
1448         g2d->max_pool = MAX_POOL;
1449
1450         platform_set_drvdata(pdev, g2d);
1451
1452         subdrv = &g2d->subdrv;
1453         subdrv->dev = dev;
1454         subdrv->probe = g2d_subdrv_probe;
1455         subdrv->remove = g2d_subdrv_remove;
1456         subdrv->open = g2d_open;
1457         subdrv->close = g2d_close;
1458
1459         ret = exynos_drm_subdrv_register(subdrv);
1460         if (ret < 0) {
1461                 dev_err(dev, "failed to register drm g2d device\n");
1462                 goto err_put_clk;
1463         }
1464
1465         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1466                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1467
1468         return 0;
1469
1470 err_put_clk:
1471         pm_runtime_disable(dev);
1472 err_destroy_workqueue:
1473         destroy_workqueue(g2d->g2d_workq);
1474 err_destroy_slab:
1475         kmem_cache_destroy(g2d->runqueue_slab);
1476         return ret;
1477 }
1478
1479 static int g2d_remove(struct platform_device *pdev)
1480 {
1481         struct g2d_data *g2d = platform_get_drvdata(pdev);
1482
1483         cancel_work_sync(&g2d->runqueue_work);
1484         exynos_drm_subdrv_unregister(&g2d->subdrv);
1485
1486         while (g2d->runqueue_node) {
1487                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1488                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1489         }
1490
1491         pm_runtime_disable(&pdev->dev);
1492
1493         g2d_fini_cmdlist(g2d);
1494         destroy_workqueue(g2d->g2d_workq);
1495         kmem_cache_destroy(g2d->runqueue_slab);
1496
1497         return 0;
1498 }
1499
1500 #ifdef CONFIG_PM_SLEEP
1501 static int g2d_suspend(struct device *dev)
1502 {
1503         struct g2d_data *g2d = dev_get_drvdata(dev);
1504
1505         mutex_lock(&g2d->runqueue_mutex);
1506         g2d->suspended = true;
1507         mutex_unlock(&g2d->runqueue_mutex);
1508
1509         while (g2d->runqueue_node)
1510                 /* FIXME: good range? */
1511                 usleep_range(500, 1000);
1512
1513         flush_work(&g2d->runqueue_work);
1514
1515         return 0;
1516 }
1517
1518 static int g2d_resume(struct device *dev)
1519 {
1520         struct g2d_data *g2d = dev_get_drvdata(dev);
1521
1522         g2d->suspended = false;
1523         g2d_exec_runqueue(g2d);
1524
1525         return 0;
1526 }
1527 #endif
1528
1529 #ifdef CONFIG_PM
1530 static int g2d_runtime_suspend(struct device *dev)
1531 {
1532         struct g2d_data *g2d = dev_get_drvdata(dev);
1533
1534         clk_disable_unprepare(g2d->gate_clk);
1535
1536         return 0;
1537 }
1538
1539 static int g2d_runtime_resume(struct device *dev)
1540 {
1541         struct g2d_data *g2d = dev_get_drvdata(dev);
1542         int ret;
1543
1544         ret = clk_prepare_enable(g2d->gate_clk);
1545         if (ret < 0)
1546                 dev_warn(dev, "failed to enable clock.\n");
1547
1548         return ret;
1549 }
1550 #endif
1551
1552 static const struct dev_pm_ops g2d_pm_ops = {
1553         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1554         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1555 };
1556
1557 static const struct of_device_id exynos_g2d_match[] = {
1558         { .compatible = "samsung,exynos5250-g2d" },
1559         { .compatible = "samsung,exynos4212-g2d" },
1560         {},
1561 };
1562 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1563
1564 struct platform_driver g2d_driver = {
1565         .probe          = g2d_probe,
1566         .remove         = g2d_remove,
1567         .driver         = {
1568                 .name   = "s5p-g2d",
1569                 .owner  = THIS_MODULE,
1570                 .pm     = &g2d_pm_ops,
1571                 .of_match_table = exynos_g2d_match,
1572         },
1573 };