drivers/gpu/drm/rockchip/rockchip_drm_rga.c

   1 #include <linux/clk.h>
   2 #include <linux/debugfs.h>
   3 #include <linux/delay.h>
   4 #include <linux/dma-buf.h>
   5 #include <linux/dma-mapping.h>
   6 #include <linux/interrupt.h>
   7 #include <linux/of.h>
   8 #include <linux/of_address.h>
   9 #include <linux/of_device.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/reset.h>
  12 #include <linux/seq_file.h>
  13 #include <linux/slab.h>
  14 #include <linux/uaccess.h>
  15
  16 #include <asm/cacheflush.h>
  17 #include <drm/drmP.h>
  18 #include <drm/rockchip_drm.h>
  19
  20 #include "rockchip_drm_drv.h"
  21 #include "rockchip_drm_rga.h"
  22
  23 #define RGA_MODE_BASE_REG               0x0100
  24 #define RGA_MODE_MAX_REG                0x017C
  25
  26 #define RGA_SYS_CTRL                    0x0000
  27 #define RGA_CMD_CTRL                    0x0004
  28 #define RGA_CMD_BASE                    0x0008
  29 #define RGA_INT                         0x0010
  30 #define RGA_MMU_CTRL0                   0x0014
  31 #define RGA_VERSION_INFO                0x0028
  32
  33 #define RGA_SRC_Y_RGB_BASE_ADDR         0x0108
  34 #define RGA_SRC_CB_BASE_ADDR            0x010C
  35 #define RGA_SRC_CR_BASE_ADDR            0x0110
  36 #define RGA_SRC1_RGB_BASE_ADDR          0x0114
  37 #define RGA_DST_Y_RGB_BASE_ADDR         0x013C
  38 #define RGA_DST_CB_BASE_ADDR            0x0140
  39 #define RGA_DST_CR_BASE_ADDR            0x014C
  40 #define RGA_MMU_CTRL1                   0x016C
  41 #define RGA_MMU_SRC_BASE                0x0170
  42 #define RGA_MMU_SRC1_BASE               0x0174
  43 #define RGA_MMU_DST_BASE                0x0178
  44
  45 static void __user *rga_compat_ptr(u64 value)
  46 {
  47 #ifdef CONFIG_ARM64
  48         return (void __user *)(value);
  49 #else
  50         return (void __user *)((u32)(value));
  51 #endif
  52 }
  53
  54 static void rga_dma_flush_range(void *ptr, int size)
  55 {
  56 #ifdef CONFIG_ARM
  57         dmac_flush_range(ptr, ptr + size);
  58         outer_flush_range(virt_to_phys(ptr), virt_to_phys(ptr + size));
  59 #elif defined CONFIG_ARM64
  60         __dma_flush_range(ptr, ptr + size);
  61 #endif
  62 }
  63
  64 static inline void rga_write(struct rockchip_rga *rga, u32 reg, u32 value)
  65 {
  66         writel(value, rga->regs + reg);
  67 }
  68
  69 static inline u32 rga_read(struct rockchip_rga *rga, u32 reg)
  70 {
  71         return readl(rga->regs + reg);
  72 }
  73
  74 static inline void rga_mod(struct rockchip_rga *rga, u32 reg, u32 val, u32 mask)
  75 {
  76         u32 temp = rga_read(rga, reg) & ~(mask);
  77
  78         temp |= val & mask;
  79         rga_write(rga, reg, temp);
  80 }
  81
  82 static int rga_enable_clocks(struct rockchip_rga *rga)
  83 {
  84         int ret;
  85
  86         ret = clk_prepare_enable(rga->sclk);
  87         if (ret) {
  88                 dev_err(rga->dev, "Cannot enable rga sclk: %d\n", ret);
  89                 return ret;
  90         }
  91
  92         ret = clk_prepare_enable(rga->aclk);
  93         if (ret) {
  94                 dev_err(rga->dev, "Cannot enable rga aclk: %d\n", ret);
  95                 goto err_disable_sclk;
  96         }
  97
  98         ret = clk_prepare_enable(rga->hclk);
  99         if (ret) {
 100                 dev_err(rga->dev, "Cannot enable rga hclk: %d\n", ret);
 101                 goto err_disable_aclk;
 102         }
 103
 104         return 0;
 105
 106 err_disable_sclk:
 107         clk_disable_unprepare(rga->sclk);
 108 err_disable_aclk:
 109         clk_disable_unprepare(rga->aclk);
 110
 111         return ret;
 112 }
 113
 114 static void rga_disable_clocks(struct rockchip_rga *rga)
 115 {
 116         clk_disable_unprepare(rga->sclk);
 117         clk_disable_unprepare(rga->hclk);
 118         clk_disable_unprepare(rga->aclk);
 119 }
 120
 121 static void rga_init_cmdlist(struct rockchip_rga *rga)
 122 {
 123         struct rga_cmdlist_node *node;
 124         int nr;
 125
 126         node = rga->cmdlist_node;
 127
 128         for (nr = 0; nr < ARRAY_SIZE(rga->cmdlist_node); nr++)
 129                 list_add_tail(&node[nr].list, &rga->free_cmdlist);
 130 }
 131
 132 static int rga_alloc_dma_buf_for_cmdlist(struct rga_runqueue_node *runqueue)
 133 {
 134         struct list_head *run_cmdlist = &runqueue->run_cmdlist;
 135         struct device *dev = runqueue->dev;
 136         struct dma_attrs cmdlist_dma_attrs;
 137         struct rga_cmdlist_node *node;
 138         void *cmdlist_pool_virt;
 139         dma_addr_t cmdlist_pool;
 140         int cmdlist_cnt = 0;
 141         int count = 0;
 142
 143         list_for_each_entry(node, run_cmdlist, list)
 144                 cmdlist_cnt++;
 145
 146         init_dma_attrs(&cmdlist_dma_attrs);
 147         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &runqueue->cmdlist_dma_attrs);
 148
 149         cmdlist_pool_virt = dma_alloc_attrs(dev, cmdlist_cnt * RGA_CMDLIST_SIZE,
 150                                             &cmdlist_pool, GFP_KERNEL,
 151                                             &cmdlist_dma_attrs);
 152         if (!cmdlist_pool_virt) {
 153                 dev_err(dev, "failed to allocate cmdlist dma memory\n");
 154                 return -ENOMEM;
 155         }
 156
 157         /*
 158          * Fill in the RGA operation registers from cmdlist command buffer,
 159          * and also filled in the MMU TLB base information.
 160          */
 161         list_for_each_entry(node, run_cmdlist, list) {
 162                 struct rga_cmdlist *cmdlist = &node->cmdlist;
 163                 unsigned int mmu_ctrl = 0;
 164                 unsigned int reg;
 165                 u32 *dest;
 166                 int i;
 167
 168                 dest = cmdlist_pool_virt + RGA_CMDLIST_SIZE * 4 * count++;
 169
 170                 for (i = 0; i < cmdlist->last / 2; i++) {
 171                         reg = (node->cmdlist.data[2 * i] - RGA_MODE_BASE_REG);
 172                         if (reg > RGA_MODE_BASE_REG)
 173                                 continue;
 174                         dest[reg >> 2] = cmdlist->data[2 * i + 1];
 175                 }
 176
 177                 if (cmdlist->src_mmu_pages) {
 178                         reg = RGA_MMU_SRC_BASE - RGA_MODE_BASE_REG;
 179                         dest[reg >> 2] = virt_to_phys(cmdlist->src_mmu_pages) >> 4;
 180                         mmu_ctrl |= 0x7;
 181                 }
 182
 183                 if (cmdlist->dst_mmu_pages) {
 184                         reg = RGA_MMU_DST_BASE - RGA_MODE_BASE_REG;
 185                         dest[reg >> 2] = virt_to_phys(cmdlist->dst_mmu_pages) >> 4;
 186                         mmu_ctrl |= 0x7 << 8;
 187                 }
 188
 189                 if (cmdlist->src1_mmu_pages) {
 190                         reg = RGA_MMU_SRC1_BASE - RGA_MODE_BASE_REG;
 191                         dest[reg >> 2] = virt_to_phys(cmdlist->src1_mmu_pages) >> 4;
 192                         mmu_ctrl |= 0x7 << 4;
 193                 }
 194
 195                 reg = RGA_MMU_CTRL1 - RGA_MODE_BASE_REG;
 196                 dest[reg >> 2] = mmu_ctrl;
 197         }
 198
 199         rga_dma_flush_range(cmdlist_pool_virt, cmdlist_cnt * RGA_CMDLIST_SIZE);
 200
 201         runqueue->cmdlist_dma_attrs = cmdlist_dma_attrs;
 202         runqueue->cmdlist_pool_virt = cmdlist_pool_virt;
 203         runqueue->cmdlist_pool = cmdlist_pool;
 204         runqueue->cmdlist_cnt = cmdlist_cnt;
 205
 206         return 0;
 207 }
 208
 209 static int rga_check_reg_offset(struct device *dev,
 210                                 struct rga_cmdlist_node *node)
 211 {
 212         struct rga_cmdlist *cmdlist = &node->cmdlist;
 213         int index;
 214         int reg;
 215         int i;
 216
 217         for (i = 0; i < cmdlist->last / 2; i++) {
 218                 index = cmdlist->last - 2 * (i + 1);
 219                 reg = cmdlist->data[index];
 220
 221                 switch (reg) {
 222                 case RGA_BUF_TYPE_GEMFD | RGA_DST_Y_RGB_BASE_ADDR:
 223                 case RGA_BUF_TYPE_GEMFD | RGA_SRC_Y_RGB_BASE_ADDR:
 224                         break;
 225
 226                 case RGA_BUF_TYPE_USERPTR | RGA_DST_Y_RGB_BASE_ADDR:
 227                 case RGA_BUF_TYPE_USERPTR | RGA_SRC_Y_RGB_BASE_ADDR:
 228                         goto err;
 229
 230                 default:
 231                         if (reg < RGA_MODE_BASE_REG || reg > RGA_MODE_MAX_REG)
 232                                 goto err;
 233
 234                         if (reg % 4)
 235                                 goto err;
 236                 }
 237         }
 238
 239         return 0;
 240
 241 err:
 242         dev_err(dev, "Bad register offset: 0x%x\n", cmdlist->data[index]);
 243         return -EINVAL;
 244 }
 245
 246 static struct dma_buf_attachment *
 247 rga_gem_buf_to_pages(struct rockchip_rga *rga, void **mmu_pages, int fd)
 248 {
 249         struct dma_buf_attachment *attach;
 250         struct dma_buf *dmabuf;
 251         struct sg_table *sgt;
 252         struct scatterlist *sgl;
 253         unsigned int mapped_size = 0;
 254         unsigned int address;
 255         unsigned int len;
 256         unsigned int i, p;
 257         unsigned int *pages;
 258         int ret;
 259
 260         dmabuf = dma_buf_get(fd);
 261         if (IS_ERR(dmabuf)) {
 262                 dev_err(rga->dev, "Failed to get dma_buf with fd %d\n", fd);
 263                 return ERR_PTR(-EINVAL);
 264         }
 265
 266         attach = dma_buf_attach(dmabuf, rga->dev);
 267         if (IS_ERR(attach)) {
 268                 dev_err(rga->dev, "Failed to attach dma_buf\n");
 269                 ret = PTR_ERR(attach);
 270                 goto failed_attach;
 271         }
 272
 273         sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
 274         if (IS_ERR(sgt)) {
 275                 dev_err(rga->dev, "Failed to map dma_buf attachment\n");
 276                 ret = PTR_ERR(sgt);
 277                 goto failed_detach;
 278         }
 279
 280         /*
 281          * Alloc (2^3 * 4K) = 32K byte for storing pages, those space could
 282          * cover 32K * 4K = 128M ram address.
 283          */
 284         pages = (unsigned int *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 3);
 285
 286         for_each_sg(sgt->sgl, sgl, sgt->nents, i) {
 287                 len = sg_dma_len(sgl) >> PAGE_SHIFT;
 288                 address = sg_phys(sgl);
 289
 290                 for (p = 0; p < len; p++) {
 291                         dma_addr_t phys = address + (p << PAGE_SHIFT);
 292
 293                         pages[mapped_size + p] = phys;
 294                 }
 295
 296                 mapped_size += len;
 297         }
 298
 299         rga_dma_flush_range(pages, 32 * 1024);
 300
 301         *mmu_pages = pages;
 302
 303         dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL);
 304
 305         return attach;
 306
 307 failed_detach:
 308         dma_buf_detach(dmabuf, attach);
 309 failed_attach:
 310         dma_buf_put(dmabuf);
 311
 312         return ERR_PTR(ret);
 313 }
 314
 315 static int rga_map_cmdlist_gem(struct rockchip_rga *rga,
 316                                struct rga_cmdlist_node *node,
 317                                struct drm_device *drm_dev,
 318                                struct drm_file *file)
 319 {
 320         struct rga_cmdlist *cmdlist = &node->cmdlist;
 321         struct dma_buf_attachment *attach;
 322         void *mmu_pages;
 323         int fd;
 324         int i;
 325
 326         for (i = 0; i < cmdlist->last / 2; i++) {
 327                 int index = cmdlist->last - 2 * (i + 1);
 328
 329                 switch (cmdlist->data[index]) {
 330                 case RGA_SRC_Y_RGB_BASE_ADDR | RGA_BUF_TYPE_GEMFD:
 331                         fd = cmdlist->data[index + 1];
 332                         attach = rga_gem_buf_to_pages(rga, &mmu_pages, fd);
 333                         if (IS_ERR(attach))
 334                                 return PTR_ERR(attach);
 335
 336                         cmdlist->src_attach = attach;
 337                         cmdlist->src_mmu_pages = mmu_pages;
 338                         break;
 339
 340                 case RGA_DST_Y_RGB_BASE_ADDR | RGA_BUF_TYPE_GEMFD:
 341                         fd = cmdlist->data[index + 1];
 342                         attach = rga_gem_buf_to_pages(rga, &mmu_pages, fd);
 343                         if (IS_ERR(attach))
 344                                 return PTR_ERR(attach);
 345
 346                         cmdlist->dst_attach = attach;
 347                         cmdlist->dst_mmu_pages = mmu_pages;
 348                         break;
 349                 }
 350         }
 351
 352         return 0;
 353 }
 354
 355 static void rga_unmap_cmdlist_gem(struct rockchip_rga *rga,
 356                                   struct rga_cmdlist_node *node)
 357 {
 358         struct dma_buf_attachment *attach;
 359         struct dma_buf *dma_buf;
 360
 361         attach = node->cmdlist.src_attach;
 362         if (attach) {
 363                 dma_buf = attach->dmabuf;
 364                 dma_buf_detach(dma_buf, attach);
 365                 dma_buf_put(dma_buf);
 366         }
 367         node->cmdlist.src_attach = NULL;
 368
 369         attach = node->cmdlist.dst_attach;
 370         if (attach) {
 371                 dma_buf = attach->dmabuf;
 372                 dma_buf_detach(dma_buf, attach);
 373                 dma_buf_put(dma_buf);
 374         }
 375         node->cmdlist.dst_attach = NULL;
 376
 377         if (node->cmdlist.src_mmu_pages)
 378                 free_pages((unsigned long)node->cmdlist.src_mmu_pages, 3);
 379         node->cmdlist.src_mmu_pages = NULL;
 380
 381         if (node->cmdlist.src1_mmu_pages)
 382                 free_pages((unsigned long)node->cmdlist.src1_mmu_pages, 3);
 383         node->cmdlist.src1_mmu_pages = NULL;
 384
 385         if (node->cmdlist.dst_mmu_pages)
 386                 free_pages((unsigned long)node->cmdlist.dst_mmu_pages, 3);
 387         node->cmdlist.dst_mmu_pages = NULL;
 388 }
 389
 390 static void rga_cmd_start(struct rockchip_rga *rga,
 391                           struct rga_runqueue_node *runqueue)
 392 {
 393         int ret;
 394
 395         ret = pm_runtime_get_sync(rga->dev);
 396         if (ret < 0)
 397                 return;
 398
 399         rga_write(rga, RGA_SYS_CTRL, 0x00);
 400
 401         rga_write(rga, RGA_CMD_BASE, runqueue->cmdlist_pool);
 402
 403         rga_write(rga, RGA_SYS_CTRL, 0x22);
 404
 405         rga_write(rga, RGA_INT, 0x600);
 406
 407         rga_write(rga, RGA_CMD_CTRL, ((runqueue->cmdlist_cnt - 1) << 3) | 0x1);
 408 }
 409
 410 static void rga_free_runqueue_node(struct rockchip_rga *rga,
 411                                    struct rga_runqueue_node *runqueue)
 412 {
 413         struct rga_cmdlist_node *node;
 414
 415         if (!runqueue)
 416                 return;
 417
 418         if (runqueue->cmdlist_pool_virt && runqueue->cmdlist_pool)
 419                 dma_free_attrs(rga->dev, runqueue->cmdlist_cnt * RGA_CMDLIST_SIZE,
 420                                runqueue->cmdlist_pool_virt,
 421                                runqueue->cmdlist_pool,
 422                                &runqueue->cmdlist_dma_attrs);
 423
 424         mutex_lock(&rga->cmdlist_mutex);
 425         /*
 426          * commands in run_cmdlist have been completed so unmap all gem
 427          * objects in each command node so that they are unreferenced.
 428          */
 429         list_for_each_entry(node, &runqueue->run_cmdlist, list)
 430                 rga_unmap_cmdlist_gem(rga, node);
 431         list_splice_tail_init(&runqueue->run_cmdlist, &rga->free_cmdlist);
 432         mutex_unlock(&rga->cmdlist_mutex);
 433
 434         kmem_cache_free(rga->runqueue_slab, runqueue);
 435 }
 436
 437 static struct rga_runqueue_node *rga_get_runqueue(struct rockchip_rga *rga)
 438 {
 439         struct rga_runqueue_node *runqueue;
 440
 441         if (list_empty(&rga->runqueue_list))
 442                 return NULL;
 443
 444         runqueue = list_first_entry(&rga->runqueue_list,
 445                                     struct rga_runqueue_node, list);
 446         list_del_init(&runqueue->list);
 447
 448         return runqueue;
 449 }
 450
 451 static void rga_exec_runqueue(struct rockchip_rga *rga)
 452 {
 453         rga->runqueue_node = rga_get_runqueue(rga);
 454         if (rga->runqueue_node)
 455                 rga_cmd_start(rga, rga->runqueue_node);
 456 }
 457
 458 static struct rga_cmdlist_node *rga_get_cmdlist(struct rockchip_rga *rga)
 459 {
 460         struct rga_cmdlist_node *node;
 461         struct device *dev = rga->dev;
 462
 463         mutex_lock(&rga->cmdlist_mutex);
 464         if (list_empty(&rga->free_cmdlist)) {
 465                 dev_err(dev, "there is no free cmdlist\n");
 466                 mutex_unlock(&rga->cmdlist_mutex);
 467                 return NULL;
 468         }
 469
 470         node = list_first_entry(&rga->free_cmdlist,
 471                                 struct rga_cmdlist_node, list);
 472         list_del_init(&node->list);
 473         mutex_unlock(&rga->cmdlist_mutex);
 474
 475         return node;
 476 }
 477
 478 static void rga_put_cmdlist(struct rockchip_rga *rga, struct rga_cmdlist_node *node)
 479 {
 480         mutex_lock(&rga->cmdlist_mutex);
 481         list_move_tail(&node->list, &rga->free_cmdlist);
 482         mutex_unlock(&rga->cmdlist_mutex);
 483 }
 484
 485 static void rga_add_cmdlist_to_inuse(struct rockchip_drm_rga_private *rga_priv,
 486                                      struct rga_cmdlist_node *node)
 487 {
 488         struct rga_cmdlist_node *lnode;
 489
 490         if (list_empty(&rga_priv->inuse_cmdlist))
 491                 goto add_to_list;
 492
 493         /* this links to base address of new cmdlist */
 494         lnode = list_entry(rga_priv->inuse_cmdlist.prev,
 495                            struct rga_cmdlist_node, list);
 496
 497 add_to_list:
 498         list_add_tail(&node->list, &rga_priv->inuse_cmdlist);
 499 }
 500
 501 /*
 502  * IOCRL functions for userspace to get RGA version.
 503  */
 504 int rockchip_rga_get_ver_ioctl(struct drm_device *drm_dev, void *data,
 505                                struct drm_file *file)
 506 {
 507         struct rockchip_drm_file_private *file_priv = file->driver_priv;
 508         struct rockchip_drm_rga_private *rga_priv = file_priv->rga_priv;
 509         struct drm_rockchip_rga_get_ver *ver = data;
 510         struct rockchip_rga *rga;
 511         struct device *dev;
 512
 513         if (!rga_priv)
 514                 return -ENODEV;
 515
 516         dev = rga_priv->dev;
 517         if (!dev)
 518                 return -ENODEV;
 519
 520         rga = dev_get_drvdata(dev);
 521         if (!rga)
 522                 return -EFAULT;
 523
 524         ver->major = rga->version.major;
 525         ver->minor = rga->version.minor;
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * IOCRL functions for userspace to send an RGA request.
 532  */
 533 int rockchip_rga_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
 534                                    struct drm_file *file)
 535 {
 536         struct rockchip_drm_file_private *file_priv = file->driver_priv;
 537         struct rockchip_drm_rga_private *rga_priv = file_priv->rga_priv;
 538         struct drm_rockchip_rga_set_cmdlist *req = data;
 539         struct rga_cmdlist_node *node;
 540         struct rga_cmdlist *cmdlist;
 541         struct rockchip_rga *rga;
 542         int ret;
 543
 544         if (!rga_priv)
 545                 return -ENODEV;
 546
 547         if (!rga_priv->dev)
 548                 return -ENODEV;
 549
 550         rga = dev_get_drvdata(rga_priv->dev);
 551         if (!rga)
 552                 return -EFAULT;
 553
 554         if (req->cmd_nr > RGA_CMDLIST_SIZE || req->cmd_buf_nr > RGA_CMDBUF_SIZE) {
 555                 dev_err(rga->dev, "cmdlist size is too big\n");
 556                 return -EINVAL;
 557         }
 558
 559         node = rga_get_cmdlist(rga);
 560         if (!node)
 561                 return -ENOMEM;
 562
 563         cmdlist = &node->cmdlist;
 564         cmdlist->last = 0;
 565
 566         /*
 567          * Copy the command / buffer registers setting from userspace, each
 568          * command have two integer, one for register offset, another for
 569          * register value.
 570          */
 571         if (copy_from_user(cmdlist->data, rga_compat_ptr(req->cmd),
 572                            sizeof(struct drm_rockchip_rga_cmd) * req->cmd_nr))
 573                 return -EFAULT;
 574         cmdlist->last += req->cmd_nr * 2;
 575
 576         if (copy_from_user(&cmdlist->data[cmdlist->last],
 577                            rga_compat_ptr(req->cmd_buf),
 578                            sizeof(struct drm_rockchip_rga_cmd) * req->cmd_buf_nr))
 579                 return -EFAULT;
 580         cmdlist->last += req->cmd_buf_nr * 2;
 581
 582         /*
 583          * Check the userspace command registers, and mapping the framebuffer,
 584          * create the RGA mmu pages or get the framebuffer dma address.
 585          */
 586         ret = rga_check_reg_offset(rga->dev, node);
 587         if (ret < 0) {
 588                 dev_err(rga->dev, "Check reg offset failed\n");
 589                 goto err_free_cmdlist;
 590         }
 591
 592         ret = rga_map_cmdlist_gem(rga, node, drm_dev, file);
 593         if (ret < 0) {
 594                 dev_err(rga->dev, "Failed to map cmdlist\n");
 595                 goto err_unmap_cmdlist;
 596         }
 597
 598         rga_add_cmdlist_to_inuse(rga_priv, node);
 599
 600         return 0;
 601
 602 err_unmap_cmdlist:
 603         rga_unmap_cmdlist_gem(rga, node);
 604 err_free_cmdlist:
 605         rga_put_cmdlist(rga, node);
 606
 607         return ret;
 608 }
 609
 610 /*
 611  * IOCRL functions for userspace to start RGA transform.
 612  */
 613 int rockchip_rga_exec_ioctl(struct drm_device *drm_dev, void *data,
 614                             struct drm_file *file)
 615 {
 616         struct rockchip_drm_file_private *file_priv = file->driver_priv;
 617         struct rockchip_drm_rga_private *rga_priv = file_priv->rga_priv;
 618         struct rga_runqueue_node *runqueue;
 619         struct rockchip_rga *rga;
 620         struct device *dev;
 621         int ret;
 622
 623         if (!rga_priv)
 624                 return -ENODEV;
 625
 626         dev = rga_priv->dev;
 627         if (!dev)
 628                 return -ENODEV;
 629
 630         rga = dev_get_drvdata(dev);
 631         if (!rga)
 632                 return -EFAULT;
 633
 634         runqueue = kmem_cache_alloc(rga->runqueue_slab, GFP_KERNEL);
 635         if (!runqueue) {
 636                 dev_err(rga->dev, "failed to allocate memory\n");
 637                 return -ENOMEM;
 638         }
 639
 640         runqueue->dev = rga->dev;
 641
 642         init_completion(&runqueue->complete);
 643
 644         INIT_LIST_HEAD(&runqueue->run_cmdlist);
 645
 646         list_splice_init(&rga_priv->inuse_cmdlist, &runqueue->run_cmdlist);
 647
 648         if (list_empty(&runqueue->run_cmdlist)) {
 649                 dev_err(rga->dev, "there is no inuse cmdlist\n");
 650                 kmem_cache_free(rga->runqueue_slab, runqueue);
 651                 return -EPERM;
 652         }
 653
 654         ret = rga_alloc_dma_buf_for_cmdlist(runqueue);
 655         if (ret < 0) {
 656                 dev_err(rga->dev, "cmdlist init failed\n");
 657                 return ret;
 658         }
 659
 660         mutex_lock(&rga->runqueue_mutex);
 661         runqueue->pid = current->pid;
 662         runqueue->file = file;
 663         list_add_tail(&runqueue->list, &rga->runqueue_list);
 664         if (!rga->runqueue_node)
 665                 rga_exec_runqueue(rga);
 666         mutex_unlock(&rga->runqueue_mutex);
 667
 668         wait_for_completion(&runqueue->complete);
 669         rga_free_runqueue_node(rga, runqueue);
 670
 671         return 0;
 672 }
 673
 674 static int rockchip_rga_open(struct drm_device *drm_dev, struct device *dev,
 675                              struct drm_file *file)
 676 {
 677         struct rockchip_drm_file_private *file_priv = file->driver_priv;
 678         struct rockchip_drm_rga_private *rga_priv;
 679
 680         rga_priv = kzalloc(sizeof(*rga_priv), GFP_KERNEL);
 681         if (!rga_priv)
 682                 return -ENOMEM;
 683
 684         rga_priv->dev = dev;
 685         file_priv->rga_priv = rga_priv;
 686
 687         INIT_LIST_HEAD(&rga_priv->inuse_cmdlist);
 688
 689         return 0;
 690 }
 691
 692 static void rockchip_rga_close(struct drm_device *drm_dev, struct device *dev,
 693                                struct drm_file *file)
 694 {
 695         struct rockchip_drm_file_private *file_priv = file->driver_priv;
 696         struct rockchip_drm_rga_private *rga_priv = file_priv->rga_priv;
 697         struct rga_cmdlist_node *node, *n;
 698         struct rockchip_rga *rga;
 699
 700         if (!dev)
 701                 return;
 702
 703         rga = dev_get_drvdata(dev);
 704         if (!rga)
 705                 return;
 706
 707         mutex_lock(&rga->cmdlist_mutex);
 708         list_for_each_entry_safe(node, n, &rga_priv->inuse_cmdlist, list) {
 709                 /*
 710                  * unmap all gem objects not completed.
 711                  *
 712                  * P.S. if current process was terminated forcely then
 713                  * there may be some commands in inuse_cmdlist so unmap
 714                  * them.
 715                  */
 716                 rga_unmap_cmdlist_gem(rga, node);
 717                 list_move_tail(&node->list, &rga->free_cmdlist);
 718         }
 719         mutex_unlock(&rga->cmdlist_mutex);
 720
 721         kfree(file_priv->rga_priv);
 722 }
 723
 724 static void rga_runqueue_worker(struct work_struct *work)
 725 {
 726         struct rockchip_rga *rga = container_of(work, struct rockchip_rga,
 727                                             runqueue_work);
 728
 729         mutex_lock(&rga->runqueue_mutex);
 730         pm_runtime_put_sync(rga->dev);
 731
 732         complete(&rga->runqueue_node->complete);
 733
 734         if (rga->suspended)
 735                 rga->runqueue_node = NULL;
 736         else
 737                 rga_exec_runqueue(rga);
 738
 739         mutex_unlock(&rga->runqueue_mutex);
 740 }
 741
 742 static irqreturn_t rga_irq_handler(int irq, void *dev_id)
 743 {
 744         struct rockchip_rga *rga = dev_id;
 745         int intr;
 746
 747         intr = rga_read(rga, RGA_INT) & 0xf;
 748
 749         rga_mod(rga, RGA_INT, intr << 4, 0xf << 4);
 750
 751         if (intr & 0x04)
 752                 queue_work(rga->rga_workq, &rga->runqueue_work);
 753
 754         return IRQ_HANDLED;
 755 }
 756
 757 static int rga_parse_dt(struct rockchip_rga *rga)
 758 {
 759         struct reset_control *core_rst, *axi_rst, *ahb_rst;
 760
 761         core_rst = devm_reset_control_get(rga->dev, "core");
 762         if (IS_ERR(core_rst)) {
 763                 dev_err(rga->dev, "failed to get core reset controller\n");
 764                 return PTR_ERR(core_rst);
 765         }
 766
 767         axi_rst = devm_reset_control_get(rga->dev, "axi");
 768         if (IS_ERR(axi_rst)) {
 769                 dev_err(rga->dev, "failed to get axi reset controller\n");
 770                 return PTR_ERR(axi_rst);
 771         }
 772
 773         ahb_rst = devm_reset_control_get(rga->dev, "ahb");
 774         if (IS_ERR(ahb_rst)) {
 775                 dev_err(rga->dev, "failed to get ahb reset controller\n");
 776                 return PTR_ERR(ahb_rst);
 777         }
 778
 779         reset_control_assert(core_rst);
 780         udelay(1);
 781         reset_control_deassert(core_rst);
 782
 783         reset_control_assert(axi_rst);
 784         udelay(1);
 785         reset_control_deassert(axi_rst);
 786
 787         reset_control_assert(ahb_rst);
 788         udelay(1);
 789         reset_control_deassert(ahb_rst);
 790
 791         rga->sclk = devm_clk_get(rga->dev, "sclk");
 792         if (IS_ERR(rga->sclk)) {
 793                 dev_err(rga->dev, "failed to get sclk clock\n");
 794                 return PTR_ERR(rga->sclk);
 795         }
 796
 797         rga->aclk = devm_clk_get(rga->dev, "aclk");
 798         if (IS_ERR(rga->aclk)) {
 799                 dev_err(rga->dev, "failed to get aclk clock\n");
 800                 return PTR_ERR(rga->aclk);
 801         }
 802
 803         rga->hclk = devm_clk_get(rga->dev, "hclk");
 804         if (IS_ERR(rga->hclk)) {
 805                 dev_err(rga->dev, "failed to get hclk clock\n");
 806                 return PTR_ERR(rga->hclk);
 807         }
 808
 809         return rga_enable_clocks(rga);
 810 }
 811
 812 static const struct of_device_id rockchip_rga_dt_ids[] = {
 813         { .compatible = "rockchip,rk3288-rga", },
 814         { .compatible = "rockchip,rk3228-rga", },
 815         { .compatible = "rockchip,rk3399-rga", },
 816         {},
 817 };
 818 MODULE_DEVICE_TABLE(of, rockchip_rga_dt_ids);
 819
 820 static int rga_probe(struct platform_device *pdev)
 821 {
 822         struct drm_rockchip_subdrv *subdrv;
 823         struct rockchip_rga *rga;
 824         struct resource *iores;
 825         int irq;
 826         int ret;
 827
 828         if (!pdev->dev.of_node)
 829                 return -ENODEV;
 830
 831         rga = devm_kzalloc(&pdev->dev, sizeof(*rga), GFP_KERNEL);
 832         if (!rga)
 833                 return -ENOMEM;
 834
 835         rga->dev = &pdev->dev;
 836
 837         rga->runqueue_slab = kmem_cache_create("rga_runqueue_slab",
 838                                                sizeof(struct rga_runqueue_node),
 839                                                0, 0, NULL);
 840         if (!rga->runqueue_slab)
 841                 return -ENOMEM;
 842
 843         rga->rga_workq = create_singlethread_workqueue("rga");
 844         if (!rga->rga_workq) {
 845                 dev_err(rga->dev, "failed to create workqueue\n");
 846                 ret = -ENOMEM;
 847                 goto err_destroy_slab;
 848         }
 849
 850         INIT_WORK(&rga->runqueue_work, rga_runqueue_worker);
 851         INIT_LIST_HEAD(&rga->runqueue_list);
 852         mutex_init(&rga->runqueue_mutex);
 853
 854         INIT_LIST_HEAD(&rga->free_cmdlist);
 855         mutex_init(&rga->cmdlist_mutex);
 856
 857         rga_init_cmdlist(rga);
 858
 859         ret = rga_parse_dt(rga);
 860         if (ret) {
 861                 dev_err(rga->dev, "Unable to parse OF data\n");
 862                 goto err_destroy_workqueue;
 863         }
 864
 865         pm_runtime_enable(rga->dev);
 866
 867         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 868
 869         rga->regs = devm_ioremap_resource(rga->dev, iores);
 870         if (IS_ERR(rga->regs)) {
 871                 ret = PTR_ERR(rga->regs);
 872                 goto err_put_clk;
 873         }
 874
 875         irq = platform_get_irq(pdev, 0);
 876         if (irq < 0) {
 877                 dev_err(rga->dev, "failed to get irq\n");
 878                 ret = irq;
 879                 goto err_put_clk;
 880         }
 881
 882         ret = devm_request_irq(rga->dev, irq, rga_irq_handler, 0,
 883                                dev_name(rga->dev), rga);
 884         if (ret < 0) {
 885                 dev_err(rga->dev, "failed to request irq\n");
 886                 goto err_put_clk;
 887         }
 888
 889         platform_set_drvdata(pdev, rga);
 890
 891         rga->version.major = (rga_read(rga, RGA_VERSION_INFO) >> 24) & 0xFF;
 892         rga->version.minor = (rga_read(rga, RGA_VERSION_INFO) >> 20) & 0x0F;
 893
 894         subdrv = &rga->subdrv;
 895         subdrv->dev = rga->dev;
 896         subdrv->open = rockchip_rga_open;
 897         subdrv->close = rockchip_rga_close;
 898
 899         rockchip_drm_register_subdrv(subdrv);
 900
 901         return 0;
 902
 903 err_put_clk:
 904         pm_runtime_disable(rga->dev);
 905 err_destroy_workqueue:
 906         destroy_workqueue(rga->rga_workq);
 907 err_destroy_slab:
 908         kmem_cache_destroy(rga->runqueue_slab);
 909
 910         return ret;
 911 }
 912
 913 static int rga_remove(struct platform_device *pdev)
 914 {
 915         struct rockchip_rga *rga = platform_get_drvdata(pdev);
 916
 917         cancel_work_sync(&rga->runqueue_work);
 918
 919         while (rga->runqueue_node) {
 920                 rga_free_runqueue_node(rga, rga->runqueue_node);
 921                 rga->runqueue_node = rga_get_runqueue(rga);
 922         }
 923
 924         rockchip_drm_unregister_subdrv(&rga->subdrv);
 925
 926         pm_runtime_disable(rga->dev);
 927
 928         return 0;
 929 }
 930
 931 static int rga_suspend(struct device *dev)
 932 {
 933         struct rockchip_rga *rga = dev_get_drvdata(dev);
 934
 935         mutex_lock(&rga->runqueue_mutex);
 936         rga->suspended = true;
 937         mutex_unlock(&rga->runqueue_mutex);
 938
 939         flush_work(&rga->runqueue_work);
 940
 941         return 0;
 942 }
 943
 944 static int rga_resume(struct device *dev)
 945 {
 946         struct rockchip_rga *rga = dev_get_drvdata(dev);
 947
 948         rga->suspended = false;
 949         rga_exec_runqueue(rga);
 950
 951         return 0;
 952 }
 953
 954 #ifdef CONFIG_PM
 955 static int rga_runtime_suspend(struct device *dev)
 956 {
 957         struct rockchip_rga *rga = dev_get_drvdata(dev);
 958
 959         rga_disable_clocks(rga);
 960
 961         return 0;
 962 }
 963
 964 static int rga_runtime_resume(struct device *dev)
 965 {
 966         struct rockchip_rga *rga = dev_get_drvdata(dev);
 967
 968         return rga_enable_clocks(rga);
 969 }
 970 #endif
 971
 972 static const struct dev_pm_ops rga_pm = {
 973         SET_SYSTEM_SLEEP_PM_OPS(rga_suspend, rga_resume)
 974         SET_RUNTIME_PM_OPS(rga_runtime_suspend,
 975                            rga_runtime_resume, NULL)
 976 };
 977
 978 static struct platform_driver rga_pltfm_driver = {
 979         .probe  = rga_probe,
 980         .remove = rga_remove,
 981         .driver = {
 982                 .name = "rockchip-rga",
 983                 .pm = &rga_pm,
 984                 .of_match_table = rockchip_rga_dt_ids,
 985         },
 986 };
 987
 988 module_platform_driver(rga_pltfm_driver);
 989
 990 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 991 MODULE_DESCRIPTION("Rockchip RGA Driver Extension");
 992 MODULE_LICENSE("GPL");
 993 MODULE_ALIAS("platform:rockchip-rga");