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                  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                  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(to_dma_dev(subdrv->drm_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(to_dma_dev(subdrv->drm_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(to_dma_dev(subdrv->drm_dev),
 310                                 G2D_CMDLIST_POOL_SIZE,
 311                                 g2d->cmdlist_pool_virt,
 312                                 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
 313         }
 314 }
 315
 316 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
 317 {
 318         struct device *dev = g2d->dev;
 319         struct g2d_cmdlist_node *node;
 320
 321         mutex_lock(&g2d->cmdlist_mutex);
 322         if (list_empty(&g2d->free_cmdlist)) {
 323                 dev_err(dev, "there is no free cmdlist\n");
 324                 mutex_unlock(&g2d->cmdlist_mutex);
 325                 return NULL;
 326         }
 327
 328         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
 329                                 list);
 330         list_del_init(&node->list);
 331         mutex_unlock(&g2d->cmdlist_mutex);
 332
 333         return node;
 334 }
 335
 336 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
 337 {
 338         mutex_lock(&g2d->cmdlist_mutex);
 339         list_move_tail(&node->list, &g2d->free_cmdlist);
 340         mutex_unlock(&g2d->cmdlist_mutex);
 341 }
 342
 343 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
 344                                      struct g2d_cmdlist_node *node)
 345 {
 346         struct g2d_cmdlist_node *lnode;
 347
 348         if (list_empty(&g2d_priv->inuse_cmdlist))
 349                 goto add_to_list;
 350
 351         /* this links to base address of new cmdlist */
 352         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
 353                                 struct g2d_cmdlist_node, list);
 354         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
 355
 356 add_to_list:
 357         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
 358
 359         if (node->event)
 360                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
 361 }
 362
 363 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
 364                                         unsigned long obj,
 365                                         bool force)
 366 {
 367         struct g2d_cmdlist_userptr *g2d_userptr =
 368                                         (struct g2d_cmdlist_userptr *)obj;
 369         struct page **pages;
 370
 371         if (!obj)
 372                 return;
 373
 374         if (force)
 375                 goto out;
 376
 377         atomic_dec(&g2d_userptr->refcount);
 378
 379         if (atomic_read(&g2d_userptr->refcount) > 0)
 380                 return;
 381
 382         if (g2d_userptr->in_pool)
 383                 return;
 384
 385 out:
 386         dma_unmap_sg(to_dma_dev(drm_dev), g2d_userptr->sgt->sgl,
 387                         g2d_userptr->sgt->nents, DMA_BIDIRECTIONAL);
 388
 389         pages = frame_vector_pages(g2d_userptr->vec);
 390         if (!IS_ERR(pages)) {
 391                 int i;
 392
 393                 for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++)
 394                         set_page_dirty_lock(pages[i]);
 395         }
 396         put_vaddr_frames(g2d_userptr->vec);
 397         frame_vector_destroy(g2d_userptr->vec);
 398
 399         if (!g2d_userptr->out_of_list)
 400                 list_del_init(&g2d_userptr->list);
 401
 402         sg_free_table(g2d_userptr->sgt);
 403         kfree(g2d_userptr->sgt);
 404         kfree(g2d_userptr);
 405 }
 406
 407 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
 408                                         unsigned long userptr,
 409                                         unsigned long size,
 410                                         struct drm_file *filp,
 411                                         unsigned long *obj)
 412 {
 413         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 414         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 415         struct g2d_cmdlist_userptr *g2d_userptr;
 416         struct g2d_data *g2d;
 417         struct sg_table *sgt;
 418         unsigned long start, end;
 419         unsigned int npages, offset;
 420         int ret;
 421
 422         if (!size) {
 423                 DRM_ERROR("invalid userptr size.\n");
 424                 return ERR_PTR(-EINVAL);
 425         }
 426
 427         g2d = dev_get_drvdata(g2d_priv->dev);
 428
 429         /* check if userptr already exists in userptr_list. */
 430         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
 431                 if (g2d_userptr->userptr == userptr) {
 432                         /*
 433                          * also check size because there could be same address
 434                          * and different size.
 435                          */
 436                         if (g2d_userptr->size == size) {
 437                                 atomic_inc(&g2d_userptr->refcount);
 438                                 *obj = (unsigned long)g2d_userptr;
 439
 440                                 return &g2d_userptr->dma_addr;
 441                         }
 442
 443                         /*
 444                          * at this moment, maybe g2d dma is accessing this
 445                          * g2d_userptr memory region so just remove this
 446                          * g2d_userptr object from userptr_list not to be
 447                          * referred again and also except it the userptr
 448                          * pool to be released after the dma access completion.
 449                          */
 450                         g2d_userptr->out_of_list = true;
 451                         g2d_userptr->in_pool = false;
 452                         list_del_init(&g2d_userptr->list);
 453
 454                         break;
 455                 }
 456         }
 457
 458         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
 459         if (!g2d_userptr)
 460                 return ERR_PTR(-ENOMEM);
 461
 462         atomic_set(&g2d_userptr->refcount, 1);
 463         g2d_userptr->size = size;
 464
 465         start = userptr & PAGE_MASK;
 466         offset = userptr & ~PAGE_MASK;
 467         end = PAGE_ALIGN(userptr + size);
 468         npages = (end - start) >> PAGE_SHIFT;
 469         g2d_userptr->vec = frame_vector_create(npages);
 470         if (!g2d_userptr->vec) {
 471                 ret = -ENOMEM;
 472                 goto err_free;
 473         }
 474
 475         ret = get_vaddr_frames(start, npages, true, true, g2d_userptr->vec);
 476         if (ret != npages) {
 477                 DRM_ERROR("failed to get user pages from userptr.\n");
 478                 if (ret < 0)
 479                         goto err_destroy_framevec;
 480                 ret = -EFAULT;
 481                 goto err_put_framevec;
 482         }
 483         if (frame_vector_to_pages(g2d_userptr->vec) < 0) {
 484                 ret = -EFAULT;
 485                 goto err_put_framevec;
 486         }
 487
 488         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 489         if (!sgt) {
 490                 ret = -ENOMEM;
 491                 goto err_put_framevec;
 492         }
 493
 494         ret = sg_alloc_table_from_pages(sgt,
 495                                         frame_vector_pages(g2d_userptr->vec),
 496                                         npages, offset, size, GFP_KERNEL);
 497         if (ret < 0) {
 498                 DRM_ERROR("failed to get sgt from pages.\n");
 499                 goto err_free_sgt;
 500         }
 501
 502         g2d_userptr->sgt = sgt;
 503
 504         if (!dma_map_sg(to_dma_dev(drm_dev), sgt->sgl, sgt->nents,
 505                                 DMA_BIDIRECTIONAL)) {
 506                 DRM_ERROR("failed to map sgt with dma region.\n");
 507                 ret = -ENOMEM;
 508                 goto err_sg_free_table;
 509         }
 510
 511         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
 512         g2d_userptr->userptr = userptr;
 513
 514         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
 515
 516         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
 517                 g2d->current_pool += npages << PAGE_SHIFT;
 518                 g2d_userptr->in_pool = true;
 519         }
 520
 521         *obj = (unsigned long)g2d_userptr;
 522
 523         return &g2d_userptr->dma_addr;
 524
 525 err_sg_free_table:
 526         sg_free_table(sgt);
 527
 528 err_free_sgt:
 529         kfree(sgt);
 530
 531 err_put_framevec:
 532         put_vaddr_frames(g2d_userptr->vec);
 533
 534 err_destroy_framevec:
 535         frame_vector_destroy(g2d_userptr->vec);
 536
 537 err_free:
 538         kfree(g2d_userptr);
 539
 540         return ERR_PTR(ret);
 541 }
 542
 543 static void g2d_userptr_free_all(struct drm_device *drm_dev,
 544                                         struct g2d_data *g2d,
 545                                         struct drm_file *filp)
 546 {
 547         struct drm_exynos_file_private *file_priv = filp->driver_priv;
 548         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
 549         struct g2d_cmdlist_userptr *g2d_userptr, *n;
 550
 551         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
 552                 if (g2d_userptr->in_pool)
 553                         g2d_userptr_put_dma_addr(drm_dev,
 554                                                 (unsigned long)g2d_userptr,
 555                                                 true);
 556
 557         g2d->current_pool = 0;
 558 }
 559
 560 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
 561 {
 562         enum g2d_reg_type reg_type;
 563
 564         switch (reg_offset) {
 565         case G2D_SRC_BASE_ADDR:
 566         case G2D_SRC_STRIDE:
 567         case G2D_SRC_COLOR_MODE:
 568         case G2D_SRC_LEFT_TOP:
 569         case G2D_SRC_RIGHT_BOTTOM:
 570                 reg_type = REG_TYPE_SRC;
 571                 break;
 572         case G2D_SRC_PLANE2_BASE_ADDR:
 573                 reg_type = REG_TYPE_SRC_PLANE2;
 574                 break;
 575         case G2D_DST_BASE_ADDR:
 576         case G2D_DST_STRIDE:
 577         case G2D_DST_COLOR_MODE:
 578         case G2D_DST_LEFT_TOP:
 579         case G2D_DST_RIGHT_BOTTOM:
 580                 reg_type = REG_TYPE_DST;
 581                 break;
 582         case G2D_DST_PLANE2_BASE_ADDR:
 583                 reg_type = REG_TYPE_DST_PLANE2;
 584                 break;
 585         case G2D_PAT_BASE_ADDR:
 586                 reg_type = REG_TYPE_PAT;
 587                 break;
 588         case G2D_MSK_BASE_ADDR:
 589                 reg_type = REG_TYPE_MSK;
 590                 break;
 591         default:
 592                 reg_type = REG_TYPE_NONE;
 593                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
 594                 break;
 595         }
 596
 597         return reg_type;
 598 }
 599
 600 static unsigned long g2d_get_buf_bpp(unsigned int format)
 601 {
 602         unsigned long bpp;
 603
 604         switch (format) {
 605         case G2D_FMT_XRGB8888:
 606         case G2D_FMT_ARGB8888:
 607                 bpp = 4;
 608                 break;
 609         case G2D_FMT_RGB565:
 610         case G2D_FMT_XRGB1555:
 611         case G2D_FMT_ARGB1555:
 612         case G2D_FMT_XRGB4444:
 613         case G2D_FMT_ARGB4444:
 614                 bpp = 2;
 615                 break;
 616         case G2D_FMT_PACKED_RGB888:
 617                 bpp = 3;
 618                 break;
 619         default:
 620                 bpp = 1;
 621                 break;
 622         }
 623
 624         return bpp;
 625 }
 626
 627 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
 628                                                 enum g2d_reg_type reg_type,
 629                                                 unsigned long size)
 630 {
 631         int width, height;
 632         unsigned long bpp, last_pos;
 633
 634         /*
 635          * check source and destination buffers only.
 636          * so the others are always valid.
 637          */
 638         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
 639                 return true;
 640
 641         /* This check also makes sure that right_x > left_x. */
 642         width = (int)buf_desc->right_x - (int)buf_desc->left_x;
 643         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
 644                 DRM_ERROR("width[%d] is out of range!\n", width);
 645                 return false;
 646         }
 647
 648         /* This check also makes sure that bottom_y > top_y. */
 649         height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
 650         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
 651                 DRM_ERROR("height[%d] is out of range!\n", height);
 652                 return false;
 653         }
 654
 655         bpp = g2d_get_buf_bpp(buf_desc->format);
 656
 657         /* Compute the position of the last byte that the engine accesses. */
 658         last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
 659                 (unsigned long)buf_desc->stride +
 660                 (unsigned long)buf_desc->right_x * bpp - 1;
 661
 662         /*
 663          * Since right_x > left_x and bottom_y > top_y we already know
 664          * that the first_pos < last_pos (first_pos being the position
 665          * of the first byte the engine accesses), it just remains to
 666          * check if last_pos is smaller then the buffer size.
 667          */
 668
 669         if (last_pos >= size) {
 670                 DRM_ERROR("last engine access position [%lu] "
 671                         "is out of range [%lu]!\n", last_pos, size);
 672                 return false;
 673         }
 674
 675         return true;
 676 }
 677
 678 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
 679                                 struct g2d_cmdlist_node *node,
 680                                 struct drm_device *drm_dev,
 681                                 struct drm_file *file)
 682 {
 683         struct g2d_cmdlist *cmdlist = node->cmdlist;
 684         struct g2d_buf_info *buf_info = &node->buf_info;
 685         int offset;
 686         int ret;
 687         int i;
 688
 689         for (i = 0; i < buf_info->map_nr; i++) {
 690                 struct g2d_buf_desc *buf_desc;
 691                 enum g2d_reg_type reg_type;
 692                 int reg_pos;
 693                 unsigned long handle;
 694                 dma_addr_t *addr;
 695
 696                 reg_pos = cmdlist->last - 2 * (i + 1);
 697
 698                 offset = cmdlist->data[reg_pos];
 699                 handle = cmdlist->data[reg_pos + 1];
 700
 701                 reg_type = g2d_get_reg_type(offset);
 702                 if (reg_type == REG_TYPE_NONE) {
 703                         ret = -EFAULT;
 704                         goto err;
 705                 }
 706
 707                 buf_desc = &buf_info->descs[reg_type];
 708
 709                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
 710                         unsigned long size;
 711
 712                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
 713                         if (!size) {
 714                                 ret = -EFAULT;
 715                                 goto err;
 716                         }
 717
 718                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 719                                                                         size)) {
 720                                 ret = -EFAULT;
 721                                 goto err;
 722                         }
 723
 724                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
 725                                                                 file);
 726                         if (IS_ERR(addr)) {
 727                                 ret = -EFAULT;
 728                                 goto err;
 729                         }
 730                 } else {
 731                         struct drm_exynos_g2d_userptr g2d_userptr;
 732
 733                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
 734                                 sizeof(struct drm_exynos_g2d_userptr))) {
 735                                 ret = -EFAULT;
 736                                 goto err;
 737                         }
 738
 739                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
 740                                                         g2d_userptr.size)) {
 741                                 ret = -EFAULT;
 742                                 goto err;
 743                         }
 744
 745                         addr = g2d_userptr_get_dma_addr(drm_dev,
 746                                                         g2d_userptr.userptr,
 747                                                         g2d_userptr.size,
 748                                                         file,
 749                                                         &handle);
 750                         if (IS_ERR(addr)) {
 751                                 ret = -EFAULT;
 752                                 goto err;
 753                         }
 754                 }
 755
 756                 cmdlist->data[reg_pos + 1] = *addr;
 757                 buf_info->reg_types[i] = reg_type;
 758                 buf_info->handles[reg_type] = handle;
 759         }
 760
 761         return 0;
 762
 763 err:
 764         buf_info->map_nr = i;
 765         return ret;
 766 }
 767
 768 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 769                                   struct g2d_cmdlist_node *node,
 770                                   struct drm_file *filp)
 771 {
 772         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 773         struct g2d_buf_info *buf_info = &node->buf_info;
 774         int i;
 775
 776         for (i = 0; i < buf_info->map_nr; i++) {
 777                 struct g2d_buf_desc *buf_desc;
 778                 enum g2d_reg_type reg_type;
 779                 unsigned long handle;
 780
 781                 reg_type = buf_info->reg_types[i];
 782
 783                 buf_desc = &buf_info->descs[reg_type];
 784                 handle = buf_info->handles[reg_type];
 785
 786                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
 787                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
 788                                                         filp);
 789                 else
 790                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
 791                                                         false);
 792
 793                 buf_info->reg_types[i] = REG_TYPE_NONE;
 794                 buf_info->handles[reg_type] = 0;
 795                 buf_info->types[reg_type] = 0;
 796                 memset(buf_desc, 0x00, sizeof(*buf_desc));
 797         }
 798
 799         buf_info->map_nr = 0;
 800 }
 801
 802 static void g2d_dma_start(struct g2d_data *g2d,
 803                           struct g2d_runqueue_node *runqueue_node)
 804 {
 805         struct g2d_cmdlist_node *node =
 806                                 list_first_entry(&runqueue_node->run_cmdlist,
 807                                                 struct g2d_cmdlist_node, list);
 808         int ret;
 809
 810         ret = pm_runtime_get_sync(g2d->dev);
 811         if (ret < 0)
 812                 return;
 813
 814         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
 815         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
 816 }
 817
 818 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
 819 {
 820         struct g2d_runqueue_node *runqueue_node;
 821
 822         if (list_empty(&g2d->runqueue))
 823                 return NULL;
 824
 825         runqueue_node = list_first_entry(&g2d->runqueue,
 826                                          struct g2d_runqueue_node, list);
 827         list_del_init(&runqueue_node->list);
 828         return runqueue_node;
 829 }
 830
 831 static void g2d_free_runqueue_node(struct g2d_data *g2d,
 832                                    struct g2d_runqueue_node *runqueue_node)
 833 {
 834         struct g2d_cmdlist_node *node;
 835
 836         if (!runqueue_node)
 837                 return;
 838
 839         mutex_lock(&g2d->cmdlist_mutex);
 840         /*
 841          * commands in run_cmdlist have been completed so unmap all gem
 842          * objects in each command node so that they are unreferenced.
 843          */
 844         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
 845                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
 846         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
 847         mutex_unlock(&g2d->cmdlist_mutex);
 848
 849         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
 850 }
 851
 852 static void g2d_exec_runqueue(struct g2d_data *g2d)
 853 {
 854         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 855         if (g2d->runqueue_node)
 856                 g2d_dma_start(g2d, g2d->runqueue_node);
 857 }
 858
 859 static void g2d_runqueue_worker(struct work_struct *work)
 860 {
 861         struct g2d_data *g2d = container_of(work, struct g2d_data,
 862                                             runqueue_work);
 863
 864         mutex_lock(&g2d->runqueue_mutex);
 865         pm_runtime_put_sync(g2d->dev);
 866
 867         complete(&g2d->runqueue_node->complete);
 868         if (g2d->runqueue_node->async)
 869                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
 870
 871         if (g2d->suspended)
 872                 g2d->runqueue_node = NULL;
 873         else
 874                 g2d_exec_runqueue(g2d);
 875         mutex_unlock(&g2d->runqueue_mutex);
 876 }
 877
 878 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
 879 {
 880         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
 881         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
 882         struct drm_exynos_pending_g2d_event *e;
 883         struct timeval now;
 884
 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         drm_send_event(drm_dev, &e->base);
 897 }
 898
 899 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
 900 {
 901         struct g2d_data *g2d = dev_id;
 902         u32 pending;
 903
 904         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
 905         if (pending)
 906                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
 907
 908         if (pending & G2D_INTP_GCMD_FIN) {
 909                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
 910
 911                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
 912                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
 913
 914                 g2d_finish_event(g2d, cmdlist_no);
 915
 916                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
 917                 if (!(pending & G2D_INTP_ACMD_FIN)) {
 918                         writel_relaxed(G2D_DMA_CONTINUE,
 919                                         g2d->regs + G2D_DMA_COMMAND);
 920                 }
 921         }
 922
 923         if (pending & G2D_INTP_ACMD_FIN)
 924                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
 925
 926         return IRQ_HANDLED;
 927 }
 928
 929 static int g2d_check_reg_offset(struct device *dev,
 930                                 struct g2d_cmdlist_node *node,
 931                                 int nr, bool for_addr)
 932 {
 933         struct g2d_cmdlist *cmdlist = node->cmdlist;
 934         int reg_offset;
 935         int index;
 936         int i;
 937
 938         for (i = 0; i < nr; i++) {
 939                 struct g2d_buf_info *buf_info = &node->buf_info;
 940                 struct g2d_buf_desc *buf_desc;
 941                 enum g2d_reg_type reg_type;
 942                 unsigned long value;
 943
 944                 index = cmdlist->last - 2 * (i + 1);
 945
 946                 reg_offset = cmdlist->data[index] & ~0xfffff000;
 947                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
 948                         goto err;
 949                 if (reg_offset % 4)
 950                         goto err;
 951
 952                 switch (reg_offset) {
 953                 case G2D_SRC_BASE_ADDR:
 954                 case G2D_SRC_PLANE2_BASE_ADDR:
 955                 case G2D_DST_BASE_ADDR:
 956                 case G2D_DST_PLANE2_BASE_ADDR:
 957                 case G2D_PAT_BASE_ADDR:
 958                 case G2D_MSK_BASE_ADDR:
 959                         if (!for_addr)
 960                                 goto err;
 961
 962                         reg_type = g2d_get_reg_type(reg_offset);
 963
 964                         /* check userptr buffer type. */
 965                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
 966                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
 967                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
 968                         } else
 969                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
 970                         break;
 971                 case G2D_SRC_STRIDE:
 972                 case G2D_DST_STRIDE:
 973                         if (for_addr)
 974                                 goto err;
 975
 976                         reg_type = g2d_get_reg_type(reg_offset);
 977
 978                         buf_desc = &buf_info->descs[reg_type];
 979                         buf_desc->stride = cmdlist->data[index + 1];
 980                         break;
 981                 case G2D_SRC_COLOR_MODE:
 982                 case G2D_DST_COLOR_MODE:
 983                         if (for_addr)
 984                                 goto err;
 985
 986                         reg_type = g2d_get_reg_type(reg_offset);
 987
 988                         buf_desc = &buf_info->descs[reg_type];
 989                         value = cmdlist->data[index + 1];
 990
 991                         buf_desc->format = value & 0xf;
 992                         break;
 993                 case G2D_SRC_LEFT_TOP:
 994                 case G2D_DST_LEFT_TOP:
 995                         if (for_addr)
 996                                 goto err;
 997
 998                         reg_type = g2d_get_reg_type(reg_offset);
 999
1000                         buf_desc = &buf_info->descs[reg_type];
1001                         value = cmdlist->data[index + 1];
1002
1003                         buf_desc->left_x = value & 0x1fff;
1004                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1005                         break;
1006                 case G2D_SRC_RIGHT_BOTTOM:
1007                 case G2D_DST_RIGHT_BOTTOM:
1008                         if (for_addr)
1009                                 goto err;
1010
1011                         reg_type = g2d_get_reg_type(reg_offset);
1012
1013                         buf_desc = &buf_info->descs[reg_type];
1014                         value = cmdlist->data[index + 1];
1015
1016                         buf_desc->right_x = value & 0x1fff;
1017                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1018                         break;
1019                 default:
1020                         if (for_addr)
1021                                 goto err;
1022                         break;
1023                 }
1024         }
1025
1026         return 0;
1027
1028 err:
1029         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1030         return -EINVAL;
1031 }
1032
1033 /* ioctl functions */
1034 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1035                              struct drm_file *file)
1036 {
1037         struct drm_exynos_file_private *file_priv = file->driver_priv;
1038         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1039         struct device *dev;
1040         struct g2d_data *g2d;
1041         struct drm_exynos_g2d_get_ver *ver = data;
1042
1043         if (!g2d_priv)
1044                 return -ENODEV;
1045
1046         dev = g2d_priv->dev;
1047         if (!dev)
1048                 return -ENODEV;
1049
1050         g2d = dev_get_drvdata(dev);
1051         if (!g2d)
1052                 return -EFAULT;
1053
1054         ver->major = G2D_HW_MAJOR_VER;
1055         ver->minor = G2D_HW_MINOR_VER;
1056
1057         return 0;
1058 }
1059
1060 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1061                                  struct drm_file *file)
1062 {
1063         struct drm_exynos_file_private *file_priv = file->driver_priv;
1064         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1065         struct device *dev;
1066         struct g2d_data *g2d;
1067         struct drm_exynos_g2d_set_cmdlist *req = data;
1068         struct drm_exynos_g2d_cmd *cmd;
1069         struct drm_exynos_pending_g2d_event *e;
1070         struct g2d_cmdlist_node *node;
1071         struct g2d_cmdlist *cmdlist;
1072         int size;
1073         int ret;
1074
1075         if (!g2d_priv)
1076                 return -ENODEV;
1077
1078         dev = g2d_priv->dev;
1079         if (!dev)
1080                 return -ENODEV;
1081
1082         g2d = dev_get_drvdata(dev);
1083         if (!g2d)
1084                 return -EFAULT;
1085
1086         node = g2d_get_cmdlist(g2d);
1087         if (!node)
1088                 return -ENOMEM;
1089
1090         node->event = NULL;
1091
1092         if (req->event_type != G2D_EVENT_NOT) {
1093                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1094                 if (!e) {
1095                         ret = -ENOMEM;
1096                         goto err;
1097                 }
1098
1099                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1100                 e->event.base.length = sizeof(e->event);
1101                 e->event.user_data = req->user_data;
1102
1103                 ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base);
1104                 if (ret) {
1105                         kfree(e);
1106                         goto err;
1107                 }
1108
1109                 node->event = e;
1110         }
1111
1112         cmdlist = node->cmdlist;
1113
1114         cmdlist->last = 0;
1115
1116         /*
1117          * If don't clear SFR registers, the cmdlist is affected by register
1118          * values of previous cmdlist. G2D hw executes SFR clear command and
1119          * a next command at the same time then the next command is ignored and
1120          * is executed rightly from next next command, so needs a dummy command
1121          * to next command of SFR clear command.
1122          */
1123         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1124         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1125         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1126         cmdlist->data[cmdlist->last++] = 0;
1127
1128         /*
1129          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1130          * and GCF bit should be set to INTEN register if user wants
1131          * G2D interrupt event once current command list execution is
1132          * finished.
1133          * Otherwise only ACF bit should be set to INTEN register so
1134          * that one interrupt is occurred after all command lists
1135          * have been completed.
1136          */
1137         if (node->event) {
1138                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1139                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1140                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1141                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1142         } else {
1143                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1144                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1145         }
1146
1147         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1148         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1149         if (size > G2D_CMDLIST_DATA_NUM) {
1150                 dev_err(dev, "cmdlist size is too big\n");
1151                 ret = -EINVAL;
1152                 goto err_free_event;
1153         }
1154
1155         cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd;
1156
1157         if (copy_from_user(cmdlist->data + cmdlist->last,
1158                                 (void __user *)cmd,
1159                                 sizeof(*cmd) * req->cmd_nr)) {
1160                 ret = -EFAULT;
1161                 goto err_free_event;
1162         }
1163         cmdlist->last += req->cmd_nr * 2;
1164
1165         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1166         if (ret < 0)
1167                 goto err_free_event;
1168
1169         node->buf_info.map_nr = req->cmd_buf_nr;
1170         if (req->cmd_buf_nr) {
1171                 struct drm_exynos_g2d_cmd *cmd_buf;
1172
1173                 cmd_buf = (struct drm_exynos_g2d_cmd *)
1174                                 (unsigned long)req->cmd_buf;
1175
1176                 if (copy_from_user(cmdlist->data + cmdlist->last,
1177                                         (void __user *)cmd_buf,
1178                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1179                         ret = -EFAULT;
1180                         goto err_free_event;
1181                 }
1182                 cmdlist->last += req->cmd_buf_nr * 2;
1183
1184                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1185                 if (ret < 0)
1186                         goto err_free_event;
1187
1188                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1189                 if (ret < 0)
1190                         goto err_unmap;
1191         }
1192
1193         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1194         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1195
1196         /* head */
1197         cmdlist->head = cmdlist->last / 2;
1198
1199         /* tail */
1200         cmdlist->data[cmdlist->last] = 0;
1201
1202         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1203
1204         return 0;
1205
1206 err_unmap:
1207         g2d_unmap_cmdlist_gem(g2d, node, file);
1208 err_free_event:
1209         if (node->event)
1210                 drm_event_cancel_free(drm_dev, &node->event->base);
1211 err:
1212         g2d_put_cmdlist(g2d, node);
1213         return ret;
1214 }
1215
1216 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1217                           struct drm_file *file)
1218 {
1219         struct drm_exynos_file_private *file_priv = file->driver_priv;
1220         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1221         struct device *dev;
1222         struct g2d_data *g2d;
1223         struct drm_exynos_g2d_exec *req = data;
1224         struct g2d_runqueue_node *runqueue_node;
1225         struct list_head *run_cmdlist;
1226         struct list_head *event_list;
1227
1228         if (!g2d_priv)
1229                 return -ENODEV;
1230
1231         dev = g2d_priv->dev;
1232         if (!dev)
1233                 return -ENODEV;
1234
1235         g2d = dev_get_drvdata(dev);
1236         if (!g2d)
1237                 return -EFAULT;
1238
1239         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1240         if (!runqueue_node) {
1241                 dev_err(dev, "failed to allocate memory\n");
1242                 return -ENOMEM;
1243         }
1244         run_cmdlist = &runqueue_node->run_cmdlist;
1245         event_list = &runqueue_node->event_list;
1246         INIT_LIST_HEAD(run_cmdlist);
1247         INIT_LIST_HEAD(event_list);
1248         init_completion(&runqueue_node->complete);
1249         runqueue_node->async = req->async;
1250
1251         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1252         list_splice_init(&g2d_priv->event_list, event_list);
1253
1254         if (list_empty(run_cmdlist)) {
1255                 dev_err(dev, "there is no inuse cmdlist\n");
1256                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1257                 return -EPERM;
1258         }
1259
1260         mutex_lock(&g2d->runqueue_mutex);
1261         runqueue_node->pid = current->pid;
1262         runqueue_node->filp = file;
1263         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1264         if (!g2d->runqueue_node)
1265                 g2d_exec_runqueue(g2d);
1266         mutex_unlock(&g2d->runqueue_mutex);
1267
1268         if (runqueue_node->async)
1269                 goto out;
1270
1271         wait_for_completion(&runqueue_node->complete);
1272         g2d_free_runqueue_node(g2d, runqueue_node);
1273
1274 out:
1275         return 0;
1276 }
1277
1278 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1279 {
1280         struct g2d_data *g2d;
1281         int ret;
1282
1283         g2d = dev_get_drvdata(dev);
1284         if (!g2d)
1285                 return -EFAULT;
1286
1287         /* allocate dma-aware cmdlist buffer. */
1288         ret = g2d_init_cmdlist(g2d);
1289         if (ret < 0) {
1290                 dev_err(dev, "cmdlist init failed\n");
1291                 return ret;
1292         }
1293
1294         ret = drm_iommu_attach_device(drm_dev, dev);
1295         if (ret < 0) {
1296                 dev_err(dev, "failed to enable iommu.\n");
1297                 g2d_fini_cmdlist(g2d);
1298         }
1299
1300         return ret;
1301
1302 }
1303
1304 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1305 {
1306         drm_iommu_detach_device(drm_dev, dev);
1307 }
1308
1309 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1310                         struct drm_file *file)
1311 {
1312         struct drm_exynos_file_private *file_priv = file->driver_priv;
1313         struct exynos_drm_g2d_private *g2d_priv;
1314
1315         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1316         if (!g2d_priv)
1317                 return -ENOMEM;
1318
1319         g2d_priv->dev = dev;
1320         file_priv->g2d_priv = g2d_priv;
1321
1322         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1323         INIT_LIST_HEAD(&g2d_priv->event_list);
1324         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1325
1326         return 0;
1327 }
1328
1329 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1330                         struct drm_file *file)
1331 {
1332         struct drm_exynos_file_private *file_priv = file->driver_priv;
1333         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1334         struct g2d_data *g2d;
1335         struct g2d_cmdlist_node *node, *n;
1336
1337         if (!dev)
1338                 return;
1339
1340         g2d = dev_get_drvdata(dev);
1341         if (!g2d)
1342                 return;
1343
1344         mutex_lock(&g2d->cmdlist_mutex);
1345         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1346                 /*
1347                  * unmap all gem objects not completed.
1348                  *
1349                  * P.S. if current process was terminated forcely then
1350                  * there may be some commands in inuse_cmdlist so unmap
1351                  * them.
1352                  */
1353                 g2d_unmap_cmdlist_gem(g2d, node, file);
1354                 list_move_tail(&node->list, &g2d->free_cmdlist);
1355         }
1356         mutex_unlock(&g2d->cmdlist_mutex);
1357
1358         /* release all g2d_userptr in pool. */
1359         g2d_userptr_free_all(drm_dev, g2d, file);
1360
1361         kfree(file_priv->g2d_priv);
1362 }
1363
1364 static int g2d_probe(struct platform_device *pdev)
1365 {
1366         struct device *dev = &pdev->dev;
1367         struct resource *res;
1368         struct g2d_data *g2d;
1369         struct exynos_drm_subdrv *subdrv;
1370         int ret;
1371
1372         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1373         if (!g2d)
1374                 return -ENOMEM;
1375
1376         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1377                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1378         if (!g2d->runqueue_slab)
1379                 return -ENOMEM;
1380
1381         g2d->dev = dev;
1382
1383         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1384         if (!g2d->g2d_workq) {
1385                 dev_err(dev, "failed to create workqueue\n");
1386                 ret = -EINVAL;
1387                 goto err_destroy_slab;
1388         }
1389
1390         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1391         INIT_LIST_HEAD(&g2d->free_cmdlist);
1392         INIT_LIST_HEAD(&g2d->runqueue);
1393
1394         mutex_init(&g2d->cmdlist_mutex);
1395         mutex_init(&g2d->runqueue_mutex);
1396
1397         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1398         if (IS_ERR(g2d->gate_clk)) {
1399                 dev_err(dev, "failed to get gate clock\n");
1400                 ret = PTR_ERR(g2d->gate_clk);
1401                 goto err_destroy_workqueue;
1402         }
1403
1404         pm_runtime_enable(dev);
1405
1406         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1407
1408         g2d->regs = devm_ioremap_resource(dev, res);
1409         if (IS_ERR(g2d->regs)) {
1410                 ret = PTR_ERR(g2d->regs);
1411                 goto err_put_clk;
1412         }
1413
1414         g2d->irq = platform_get_irq(pdev, 0);
1415         if (g2d->irq < 0) {
1416                 dev_err(dev, "failed to get irq\n");
1417                 ret = g2d->irq;
1418                 goto err_put_clk;
1419         }
1420
1421         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1422                                                                 "drm_g2d", g2d);
1423         if (ret < 0) {
1424                 dev_err(dev, "irq request failed\n");
1425                 goto err_put_clk;
1426         }
1427
1428         g2d->max_pool = MAX_POOL;
1429
1430         platform_set_drvdata(pdev, g2d);
1431
1432         subdrv = &g2d->subdrv;
1433         subdrv->dev = dev;
1434         subdrv->probe = g2d_subdrv_probe;
1435         subdrv->remove = g2d_subdrv_remove;
1436         subdrv->open = g2d_open;
1437         subdrv->close = g2d_close;
1438
1439         ret = exynos_drm_subdrv_register(subdrv);
1440         if (ret < 0) {
1441                 dev_err(dev, "failed to register drm g2d device\n");
1442                 goto err_put_clk;
1443         }
1444
1445         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1446                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1447
1448         return 0;
1449
1450 err_put_clk:
1451         pm_runtime_disable(dev);
1452 err_destroy_workqueue:
1453         destroy_workqueue(g2d->g2d_workq);
1454 err_destroy_slab:
1455         kmem_cache_destroy(g2d->runqueue_slab);
1456         return ret;
1457 }
1458
1459 static int g2d_remove(struct platform_device *pdev)
1460 {
1461         struct g2d_data *g2d = platform_get_drvdata(pdev);
1462
1463         cancel_work_sync(&g2d->runqueue_work);
1464         exynos_drm_subdrv_unregister(&g2d->subdrv);
1465
1466         while (g2d->runqueue_node) {
1467                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1468                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1469         }
1470
1471         pm_runtime_disable(&pdev->dev);
1472
1473         g2d_fini_cmdlist(g2d);
1474         destroy_workqueue(g2d->g2d_workq);
1475         kmem_cache_destroy(g2d->runqueue_slab);
1476
1477         return 0;
1478 }
1479
1480 #ifdef CONFIG_PM_SLEEP
1481 static int g2d_suspend(struct device *dev)
1482 {
1483         struct g2d_data *g2d = dev_get_drvdata(dev);
1484
1485         mutex_lock(&g2d->runqueue_mutex);
1486         g2d->suspended = true;
1487         mutex_unlock(&g2d->runqueue_mutex);
1488
1489         while (g2d->runqueue_node)
1490                 /* FIXME: good range? */
1491                 usleep_range(500, 1000);
1492
1493         flush_work(&g2d->runqueue_work);
1494
1495         return 0;
1496 }
1497
1498 static int g2d_resume(struct device *dev)
1499 {
1500         struct g2d_data *g2d = dev_get_drvdata(dev);
1501
1502         g2d->suspended = false;
1503         g2d_exec_runqueue(g2d);
1504
1505         return 0;
1506 }
1507 #endif
1508
1509 #ifdef CONFIG_PM
1510 static int g2d_runtime_suspend(struct device *dev)
1511 {
1512         struct g2d_data *g2d = dev_get_drvdata(dev);
1513
1514         clk_disable_unprepare(g2d->gate_clk);
1515
1516         return 0;
1517 }
1518
1519 static int g2d_runtime_resume(struct device *dev)
1520 {
1521         struct g2d_data *g2d = dev_get_drvdata(dev);
1522         int ret;
1523
1524         ret = clk_prepare_enable(g2d->gate_clk);
1525         if (ret < 0)
1526                 dev_warn(dev, "failed to enable clock.\n");
1527
1528         return ret;
1529 }
1530 #endif
1531
1532 static const struct dev_pm_ops g2d_pm_ops = {
1533         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1534         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1535 };
1536
1537 static const struct of_device_id exynos_g2d_match[] = {
1538         { .compatible = "samsung,exynos5250-g2d" },
1539         { .compatible = "samsung,exynos4212-g2d" },
1540         {},
1541 };
1542 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1543
1544 struct platform_driver g2d_driver = {
1545         .probe          = g2d_probe,
1546         .remove         = g2d_remove,
1547         .driver         = {
1548                 .name   = "s5p-g2d",
1549                 .owner  = THIS_MODULE,
1550                 .pm     = &g2d_pm_ops,
1551                 .of_match_table = exynos_g2d_match,
1552         },
1553 };