Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/gpu/drm/exynos/exynos_drm_g2d.c

  1 /*
  2  * Copyright (C) 2012 Samsung Electronics Co.Ltd
  3  * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2 as
  7  * published by the Free Software Foundationr
  8  */
  9 
 10 #include <linux/kernel.h>
 11 #include <linux/clk.h>
 12 #include <linux/err.h>
 13 #include <linux/interrupt.h>
 14 #include <linux/io.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/pm_runtime.h>
 17 #include <linux/slab.h>
 18 #include <linux/workqueue.h>
 19 #include <linux/dma-mapping.h>
 20 #include <linux/dma-attrs.h>
 21 #include <linux/of.h>
 22 
 23 #include <drm/drmP.h>
 24 #include <drm/exynos_drm.h>
 25 #include "exynos_drm_drv.h"
 26 #include "exynos_drm_g2d.h"
 27 #include "exynos_drm_gem.h"
 28 #include "exynos_drm_iommu.h"
 29 
 30 #define G2D_HW_MAJOR_VER                4
 31 #define G2D_HW_MINOR_VER                1
 32 
 33 /* vaild register range set from user: 0x0104 ~ 0x0880 */
 34 #define G2D_VALID_START                 0x0104
 35 #define G2D_VALID_END                   0x0880
 36 
 37 /* general registers */
 38 #define G2D_SOFT_RESET                  0x0000
 39 #define G2D_INTEN                       0x0004
 40 #define G2D_INTC_PEND                   0x000C
 41 #define G2D_DMA_SFR_BASE_ADDR           0x0080
 42 #define G2D_DMA_COMMAND                 0x0084
 43 #define G2D_DMA_STATUS                  0x008C
 44 #define G2D_DMA_HOLD_CMD                0x0090
 45 
 46 /* command registers */
 47 #define G2D_BITBLT_START                0x0100
 48 
 49 /* registers for base address */
 50 #define G2D_SRC_BASE_ADDR               0x0304
 51 #define G2D_SRC_COLOR_MODE              0x030C
 52 #define G2D_SRC_LEFT_TOP                0x0310
 53 #define G2D_SRC_RIGHT_BOTTOM            0x0314
 54 #define G2D_SRC_PLANE2_BASE_ADDR        0x0318
 55 #define G2D_DST_BASE_ADDR               0x0404
 56 #define G2D_DST_COLOR_MODE              0x040C
 57 #define G2D_DST_LEFT_TOP                0x0410
 58 #define G2D_DST_RIGHT_BOTTOM            0x0414
 59 #define G2D_DST_PLANE2_BASE_ADDR        0x0418
 60 #define G2D_PAT_BASE_ADDR               0x0500
 61 #define G2D_MSK_BASE_ADDR               0x0520
 62 
 63 /* G2D_SOFT_RESET */
 64 #define G2D_SFRCLEAR                    (1 << 1)
 65 #define G2D_R                           (1 << 0)
 66 
 67 /* G2D_INTEN */
 68 #define G2D_INTEN_ACF                   (1 << 3)
 69 #define G2D_INTEN_UCF                   (1 << 2)
 70 #define G2D_INTEN_GCF                   (1 << 1)
 71 #define G2D_INTEN_SCF                   (1 << 0)
 72 
 73 /* G2D_INTC_PEND */
 74 #define G2D_INTP_ACMD_FIN               (1 << 3)
 75 #define G2D_INTP_UCMD_FIN               (1 << 2)
 76 #define G2D_INTP_GCMD_FIN               (1 << 1)
 77 #define G2D_INTP_SCMD_FIN               (1 << 0)
 78 
 79 /* G2D_DMA_COMMAND */
 80 #define G2D_DMA_HALT                    (1 << 2)
 81 #define G2D_DMA_CONTINUE                (1 << 1)
 82 #define G2D_DMA_START                   (1 << 0)
 83 
 84 /* G2D_DMA_STATUS */
 85 #define G2D_DMA_LIST_DONE_COUNT         (0xFF << 17)
 86 #define G2D_DMA_BITBLT_DONE_COUNT       (0xFFFF << 1)
 87 #define G2D_DMA_DONE                    (1 << 0)
 88 #define G2D_DMA_LIST_DONE_COUNT_OFFSET  17
 89 
 90 /* G2D_DMA_HOLD_CMD */
 91 #define G2D_USER_HOLD                   (1 << 2)
 92 #define G2D_LIST_HOLD                   (1 << 1)
 93 #define G2D_BITBLT_HOLD                 (1 << 0)
 94 
 95 /* G2D_BITBLT_START */
 96 #define G2D_START_CASESEL               (1 << 2)
 97 #define G2D_START_NHOLT                 (1 << 1)
 98 #define G2D_START_BITBLT                (1 << 0)
 99 
100 /* buffer color format */
101 #define G2D_FMT_XRGB8888                0
102 #define G2D_FMT_ARGB8888                1
103 #define G2D_FMT_RGB565                  2
104 #define G2D_FMT_XRGB1555                3
105 #define G2D_FMT_ARGB1555                4
106 #define G2D_FMT_XRGB4444                5
107 #define G2D_FMT_ARGB4444                6
108 #define G2D_FMT_PACKED_RGB888           7
109 #define G2D_FMT_A8                      11
110 #define G2D_FMT_L8                      12
111 
112 /* buffer valid length */
113 #define G2D_LEN_MIN                     1
114 #define G2D_LEN_MAX                     8000
115 
116 #define G2D_CMDLIST_SIZE                (PAGE_SIZE / 4)
117 #define G2D_CMDLIST_NUM                 64
118 #define G2D_CMDLIST_POOL_SIZE           (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
119 #define G2D_CMDLIST_DATA_NUM            (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
120 
121 /* maximum buffer pool size of userptr is 64MB as default */
122 #define MAX_POOL                (64 * 1024 * 1024)
123 
124 enum {
125         BUF_TYPE_GEM = 1,
126         BUF_TYPE_USERPTR,
127 };
128 
129 enum g2d_reg_type {
130         REG_TYPE_NONE = -1,
131         REG_TYPE_SRC,
132         REG_TYPE_SRC_PLANE2,
133         REG_TYPE_DST,
134         REG_TYPE_DST_PLANE2,
135         REG_TYPE_PAT,
136         REG_TYPE_MSK,
137         MAX_REG_TYPE_NR
138 };
139 
140 /* cmdlist data structure */
141 struct g2d_cmdlist {
142         u32             head;
143         unsigned long   data[G2D_CMDLIST_DATA_NUM];
144         u32             last;   /* last data offset */
145 };
146 
147 /*
148  * A structure of buffer description
149  *
150  * @format: color format
151  * @left_x: the x coordinates of left top corner
152  * @top_y: the y coordinates of left top corner
153  * @right_x: the x coordinates of right bottom corner
154  * @bottom_y: the y coordinates of right bottom corner
155  *
156  */
157 struct g2d_buf_desc {
158         unsigned int    format;
159         unsigned int    left_x;
160         unsigned int    top_y;
161         unsigned int    right_x;
162         unsigned int    bottom_y;
163 };
164 
165 /*
166  * A structure of buffer information
167  *
168  * @map_nr: manages the number of mapped buffers
169  * @reg_types: stores regitster type in the order of requested command
170  * @handles: stores buffer handle in its reg_type position
171  * @types: stores buffer type in its reg_type position
172  * @descs: stores buffer description in its reg_type position
173  *
174  */
175 struct g2d_buf_info {
176         unsigned int            map_nr;
177         enum g2d_reg_type       reg_types[MAX_REG_TYPE_NR];
178         unsigned long           handles[MAX_REG_TYPE_NR];
179         unsigned int            types[MAX_REG_TYPE_NR];
180         struct g2d_buf_desc     descs[MAX_REG_TYPE_NR];
181 };
182 
183 struct drm_exynos_pending_g2d_event {
184         struct drm_pending_event        base;
185         struct drm_exynos_g2d_event     event;
186 };
187 
188 struct g2d_cmdlist_userptr {
189         struct list_head        list;
190         dma_addr_t              dma_addr;
191         unsigned long           userptr;
192         unsigned long           size;
193         struct page             **pages;
194         unsigned int            npages;
195         struct sg_table         *sgt;
196         struct vm_area_struct   *vma;
197         atomic_t                refcount;
198         bool                    in_pool;
199         bool                    out_of_list;
200 };
201 struct g2d_cmdlist_node {
202         struct list_head        list;
203         struct g2d_cmdlist      *cmdlist;
204         dma_addr_t              dma_addr;
205         struct g2d_buf_info     buf_info;
206 
207         struct drm_exynos_pending_g2d_event     *event;
208 };
209 
210 struct g2d_runqueue_node {
211         struct list_head        list;
212         struct list_head        run_cmdlist;
213         struct list_head        event_list;
214         struct drm_file         *filp;
215         pid_t                   pid;
216         struct completion       complete;
217         int                     async;
218 };
219 
220 struct g2d_data {
221         struct device                   *dev;
222         struct clk                      *gate_clk;
223         void __iomem                    *regs;
224         int                             irq;
225         struct workqueue_struct         *g2d_workq;
226         struct work_struct              runqueue_work;
227         struct exynos_drm_subdrv        subdrv;
228         bool                            suspended;
229 
230         /* cmdlist */
231         struct g2d_cmdlist_node         *cmdlist_node;
232         struct list_head                free_cmdlist;
233         struct mutex                    cmdlist_mutex;
234         dma_addr_t                      cmdlist_pool;
235         void                            *cmdlist_pool_virt;
236         struct dma_attrs                cmdlist_dma_attrs;
237 
238         /* runqueue*/
239         struct g2d_runqueue_node        *runqueue_node;
240         struct list_head                runqueue;
241         struct mutex                    runqueue_mutex;
242         struct kmem_cache               *runqueue_slab;
243 
244         unsigned long                   current_pool;
245         unsigned long                   max_pool;
246 };
247 
248 static int g2d_init_cmdlist(struct g2d_data *g2d)
249 {
250         struct device *dev = g2d->dev;
251         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
252         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
253         int nr;
254         int ret;
255         struct g2d_buf_info *buf_info;
256 
257         init_dma_attrs(&g2d->cmdlist_dma_attrs);
258         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
259 
260         g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
261                                                 G2D_CMDLIST_POOL_SIZE,
262                                                 &g2d->cmdlist_pool, GFP_KERNEL,
263                                                 &g2d->cmdlist_dma_attrs);
264         if (!g2d->cmdlist_pool_virt) {
265                 dev_err(dev, "failed to allocate dma memory\n");
266                 return -ENOMEM;
267         }
268 
269         node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
270         if (!node) {
271                 dev_err(dev, "failed to allocate memory\n");
272                 ret = -ENOMEM;
273                 goto err;
274         }
275 
276         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
277                 unsigned int i;
278 
279                 node[nr].cmdlist =
280                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
281                 node[nr].dma_addr =
282                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
283 
284                 buf_info = &node[nr].buf_info;
285                 for (i = 0; i < MAX_REG_TYPE_NR; i++)
286                         buf_info->reg_types[i] = REG_TYPE_NONE;
287 
288                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
289         }
290 
291         return 0;
292 
293 err:
294         dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
295                         g2d->cmdlist_pool_virt,
296                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
297         return ret;
298 }
299 
300 static void g2d_fini_cmdlist(struct g2d_data *g2d)
301 {
302         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
303 
304         kfree(g2d->cmdlist_node);
305 
306         if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
307                 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
308                                 g2d->cmdlist_pool_virt,
309                                 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
310         }
311 }
312 
313 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
314 {
315         struct device *dev = g2d->dev;
316         struct g2d_cmdlist_node *node;
317 
318         mutex_lock(&g2d->cmdlist_mutex);
319         if (list_empty(&g2d->free_cmdlist)) {
320                 dev_err(dev, "there is no free cmdlist\n");
321                 mutex_unlock(&g2d->cmdlist_mutex);
322                 return NULL;
323         }
324 
325         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
326                                 list);
327         list_del_init(&node->list);
328         mutex_unlock(&g2d->cmdlist_mutex);
329 
330         return node;
331 }
332 
333 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
334 {
335         mutex_lock(&g2d->cmdlist_mutex);
336         list_move_tail(&node->list, &g2d->free_cmdlist);
337         mutex_unlock(&g2d->cmdlist_mutex);
338 }
339 
340 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
341                                      struct g2d_cmdlist_node *node)
342 {
343         struct g2d_cmdlist_node *lnode;
344 
345         if (list_empty(&g2d_priv->inuse_cmdlist))
346                 goto add_to_list;
347 
348         /* this links to base address of new cmdlist */
349         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
350                                 struct g2d_cmdlist_node, list);
351         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
352 
353 add_to_list:
354         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
355 
356         if (node->event)
357                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
358 }
359 
360 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
361                                         unsigned long obj,
362                                         bool force)
363 {
364         struct g2d_cmdlist_userptr *g2d_userptr =
365                                         (struct g2d_cmdlist_userptr *)obj;
366 
367         if (!obj)
368                 return;
369 
370         if (force)
371                 goto out;
372 
373         atomic_dec(&g2d_userptr->refcount);
374 
375         if (atomic_read(&g2d_userptr->refcount) > 0)
376                 return;
377 
378         if (g2d_userptr->in_pool)
379                 return;
380 
381 out:
382         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
383                                         DMA_BIDIRECTIONAL);
384 
385         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
386                                         g2d_userptr->npages,
387                                         g2d_userptr->vma);
388 
389         exynos_gem_put_vma(g2d_userptr->vma);
390 
391         if (!g2d_userptr->out_of_list)
392                 list_del_init(&g2d_userptr->list);
393 
394         sg_free_table(g2d_userptr->sgt);
395         kfree(g2d_userptr->sgt);
396 
397         drm_free_large(g2d_userptr->pages);
398         kfree(g2d_userptr);
399 }
400 
401 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
402                                         unsigned long userptr,
403                                         unsigned long size,
404                                         struct drm_file *filp,
405                                         unsigned long *obj)
406 {
407         struct drm_exynos_file_private *file_priv = filp->driver_priv;
408         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
409         struct g2d_cmdlist_userptr *g2d_userptr;
410         struct g2d_data *g2d;
411         struct page **pages;
412         struct sg_table *sgt;
413         struct vm_area_struct *vma;
414         unsigned long start, end;
415         unsigned int npages, offset;
416         int ret;
417 
418         if (!size) {
419                 DRM_ERROR("invalid userptr size.\n");
420                 return ERR_PTR(-EINVAL);
421         }
422 
423         g2d = dev_get_drvdata(g2d_priv->dev);
424 
425         /* check if userptr already exists in userptr_list. */
426         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
427                 if (g2d_userptr->userptr == userptr) {
428                         /*
429                          * also check size because there could be same address
430                          * and different size.
431                          */
432                         if (g2d_userptr->size == size) {
433                                 atomic_inc(&g2d_userptr->refcount);
434                                 *obj = (unsigned long)g2d_userptr;
435 
436                                 return &g2d_userptr->dma_addr;
437                         }
438 
439                         /*
440                          * at this moment, maybe g2d dma is accessing this
441                          * g2d_userptr memory region so just remove this
442                          * g2d_userptr object from userptr_list not to be
443                          * referred again and also except it the userptr
444                          * pool to be released after the dma access completion.
445                          */
446                         g2d_userptr->out_of_list = true;
447                         g2d_userptr->in_pool = false;
448                         list_del_init(&g2d_userptr->list);
449 
450                         break;
451                 }
452         }
453 
454         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
455         if (!g2d_userptr)
456                 return ERR_PTR(-ENOMEM);
457 
458         atomic_set(&g2d_userptr->refcount, 1);
459 
460         start = userptr & PAGE_MASK;
461         offset = userptr & ~PAGE_MASK;
462         end = PAGE_ALIGN(userptr + size);
463         npages = (end - start) >> PAGE_SHIFT;
464         g2d_userptr->npages = npages;
465 
466         pages = drm_calloc_large(npages, sizeof(struct page *));
467         if (!pages) {
468                 DRM_ERROR("failed to allocate pages.\n");
469                 ret = -ENOMEM;
470                 goto err_free;
471         }
472 
473         down_read(&current->mm->mmap_sem);
474         vma = find_vma(current->mm, userptr);
475         if (!vma) {
476                 up_read(&current->mm->mmap_sem);
477                 DRM_ERROR("failed to get vm region.\n");
478                 ret = -EFAULT;
479                 goto err_free_pages;
480         }
481 
482         if (vma->vm_end < userptr + size) {
483                 up_read(&current->mm->mmap_sem);
484                 DRM_ERROR("vma is too small.\n");
485                 ret = -EFAULT;
486                 goto err_free_pages;
487         }
488 
489         g2d_userptr->vma = exynos_gem_get_vma(vma);
490         if (!g2d_userptr->vma) {
491                 up_read(&current->mm->mmap_sem);
492                 DRM_ERROR("failed to copy vma.\n");
493                 ret = -ENOMEM;
494                 goto err_free_pages;
495         }
496 
497         g2d_userptr->size = size;
498 
499         ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
500                                                 npages, pages, vma);
501         if (ret < 0) {
502                 up_read(&current->mm->mmap_sem);
503                 DRM_ERROR("failed to get user pages from userptr.\n");
504                 goto err_put_vma;
505         }
506 
507         up_read(&current->mm->mmap_sem);
508         g2d_userptr->pages = pages;
509 
510         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
511         if (!sgt) {
512                 ret = -ENOMEM;
513                 goto err_free_userptr;
514         }
515 
516         ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
517                                         size, GFP_KERNEL);
518         if (ret < 0) {
519                 DRM_ERROR("failed to get sgt from pages.\n");
520                 goto err_free_sgt;
521         }
522 
523         g2d_userptr->sgt = sgt;
524 
525         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
526                                                 DMA_BIDIRECTIONAL);
527         if (ret < 0) {
528                 DRM_ERROR("failed to map sgt with dma region.\n");
529                 goto err_sg_free_table;
530         }
531 
532         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
533         g2d_userptr->userptr = userptr;
534 
535         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
536 
537         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
538                 g2d->current_pool += npages << PAGE_SHIFT;
539                 g2d_userptr->in_pool = true;
540         }
541 
542         *obj = (unsigned long)g2d_userptr;
543 
544         return &g2d_userptr->dma_addr;
545 
546 err_sg_free_table:
547         sg_free_table(sgt);
548 
549 err_free_sgt:
550         kfree(sgt);
551 
552 err_free_userptr:
553         exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
554                                         g2d_userptr->npages,
555                                         g2d_userptr->vma);
556 
557 err_put_vma:
558         exynos_gem_put_vma(g2d_userptr->vma);
559 
560 err_free_pages:
561         drm_free_large(pages);
562 
563 err_free:
564         kfree(g2d_userptr);
565 
566         return ERR_PTR(ret);
567 }
568 
569 static void g2d_userptr_free_all(struct drm_device *drm_dev,
570                                         struct g2d_data *g2d,
571                                         struct drm_file *filp)
572 {
573         struct drm_exynos_file_private *file_priv = filp->driver_priv;
574         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
575         struct g2d_cmdlist_userptr *g2d_userptr, *n;
576 
577         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
578                 if (g2d_userptr->in_pool)
579                         g2d_userptr_put_dma_addr(drm_dev,
580                                                 (unsigned long)g2d_userptr,
581                                                 true);
582 
583         g2d->current_pool = 0;
584 }
585 
586 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
587 {
588         enum g2d_reg_type reg_type;
589 
590         switch (reg_offset) {
591         case G2D_SRC_BASE_ADDR:
592         case G2D_SRC_COLOR_MODE:
593         case G2D_SRC_LEFT_TOP:
594         case G2D_SRC_RIGHT_BOTTOM:
595                 reg_type = REG_TYPE_SRC;
596                 break;
597         case G2D_SRC_PLANE2_BASE_ADDR:
598                 reg_type = REG_TYPE_SRC_PLANE2;
599                 break;
600         case G2D_DST_BASE_ADDR:
601         case G2D_DST_COLOR_MODE:
602         case G2D_DST_LEFT_TOP:
603         case G2D_DST_RIGHT_BOTTOM:
604                 reg_type = REG_TYPE_DST;
605                 break;
606         case G2D_DST_PLANE2_BASE_ADDR:
607                 reg_type = REG_TYPE_DST_PLANE2;
608                 break;
609         case G2D_PAT_BASE_ADDR:
610                 reg_type = REG_TYPE_PAT;
611                 break;
612         case G2D_MSK_BASE_ADDR:
613                 reg_type = REG_TYPE_MSK;
614                 break;
615         default:
616                 reg_type = REG_TYPE_NONE;
617                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
618                 break;
619         }
620 
621         return reg_type;
622 }
623 
624 static unsigned long g2d_get_buf_bpp(unsigned int format)
625 {
626         unsigned long bpp;
627 
628         switch (format) {
629         case G2D_FMT_XRGB8888:
630         case G2D_FMT_ARGB8888:
631                 bpp = 4;
632                 break;
633         case G2D_FMT_RGB565:
634         case G2D_FMT_XRGB1555:
635         case G2D_FMT_ARGB1555:
636         case G2D_FMT_XRGB4444:
637         case G2D_FMT_ARGB4444:
638                 bpp = 2;
639                 break;
640         case G2D_FMT_PACKED_RGB888:
641                 bpp = 3;
642                 break;
643         default:
644                 bpp = 1;
645                 break;
646         }
647 
648         return bpp;
649 }
650 
651 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
652                                                 enum g2d_reg_type reg_type,
653                                                 unsigned long size)
654 {
655         unsigned int width, height;
656         unsigned long area;
657 
658         /*
659          * check source and destination buffers only.
660          * so the others are always valid.
661          */
662         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
663                 return true;
664 
665         width = buf_desc->right_x - buf_desc->left_x;
666         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
667                 DRM_ERROR("width[%u] is out of range!\n", width);
668                 return false;
669         }
670 
671         height = buf_desc->bottom_y - buf_desc->top_y;
672         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
673                 DRM_ERROR("height[%u] is out of range!\n", height);
674                 return false;
675         }
676 
677         area = (unsigned long)width * (unsigned long)height *
678                                         g2d_get_buf_bpp(buf_desc->format);
679         if (area > size) {
680                 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
681                 return false;
682         }
683 
684         return true;
685 }
686 
687 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
688                                 struct g2d_cmdlist_node *node,
689                                 struct drm_device *drm_dev,
690                                 struct drm_file *file)
691 {
692         struct g2d_cmdlist *cmdlist = node->cmdlist;
693         struct g2d_buf_info *buf_info = &node->buf_info;
694         int offset;
695         int ret;
696         int i;
697 
698         for (i = 0; i < buf_info->map_nr; i++) {
699                 struct g2d_buf_desc *buf_desc;
700                 enum g2d_reg_type reg_type;
701                 int reg_pos;
702                 unsigned long handle;
703                 dma_addr_t *addr;
704 
705                 reg_pos = cmdlist->last - 2 * (i + 1);
706 
707                 offset = cmdlist->data[reg_pos];
708                 handle = cmdlist->data[reg_pos + 1];
709 
710                 reg_type = g2d_get_reg_type(offset);
711                 if (reg_type == REG_TYPE_NONE) {
712                         ret = -EFAULT;
713                         goto err;
714                 }
715 
716                 buf_desc = &buf_info->descs[reg_type];
717 
718                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
719                         unsigned long size;
720 
721                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
722                         if (!size) {
723                                 ret = -EFAULT;
724                                 goto err;
725                         }
726 
727                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
728                                                                         size)) {
729                                 ret = -EFAULT;
730                                 goto err;
731                         }
732 
733                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
734                                                                 file);
735                         if (IS_ERR(addr)) {
736                                 ret = -EFAULT;
737                                 goto err;
738                         }
739                 } else {
740                         struct drm_exynos_g2d_userptr g2d_userptr;
741 
742                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
743                                 sizeof(struct drm_exynos_g2d_userptr))) {
744                                 ret = -EFAULT;
745                                 goto err;
746                         }
747 
748                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
749                                                         g2d_userptr.size)) {
750                                 ret = -EFAULT;
751                                 goto err;
752                         }
753 
754                         addr = g2d_userptr_get_dma_addr(drm_dev,
755                                                         g2d_userptr.userptr,
756                                                         g2d_userptr.size,
757                                                         file,
758                                                         &handle);
759                         if (IS_ERR(addr)) {
760                                 ret = -EFAULT;
761                                 goto err;
762                         }
763                 }
764 
765                 cmdlist->data[reg_pos + 1] = *addr;
766                 buf_info->reg_types[i] = reg_type;
767                 buf_info->handles[reg_type] = handle;
768         }
769 
770         return 0;
771 
772 err:
773         buf_info->map_nr = i;
774         return ret;
775 }
776 
777 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
778                                   struct g2d_cmdlist_node *node,
779                                   struct drm_file *filp)
780 {
781         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
782         struct g2d_buf_info *buf_info = &node->buf_info;
783         int i;
784 
785         for (i = 0; i < buf_info->map_nr; i++) {
786                 struct g2d_buf_desc *buf_desc;
787                 enum g2d_reg_type reg_type;
788                 unsigned long handle;
789 
790                 reg_type = buf_info->reg_types[i];
791 
792                 buf_desc = &buf_info->descs[reg_type];
793                 handle = buf_info->handles[reg_type];
794 
795                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
796                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
797                                                         filp);
798                 else
799                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
800                                                         false);
801 
802                 buf_info->reg_types[i] = REG_TYPE_NONE;
803                 buf_info->handles[reg_type] = 0;
804                 buf_info->types[reg_type] = 0;
805                 memset(buf_desc, 0x00, sizeof(*buf_desc));
806         }
807 
808         buf_info->map_nr = 0;
809 }
810 
811 static void g2d_dma_start(struct g2d_data *g2d,
812                           struct g2d_runqueue_node *runqueue_node)
813 {
814         struct g2d_cmdlist_node *node =
815                                 list_first_entry(&runqueue_node->run_cmdlist,
816                                                 struct g2d_cmdlist_node, list);
817         int ret;
818 
819         ret = pm_runtime_get_sync(g2d->dev);
820         if (ret < 0)
821                 return;
822 
823         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
824         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
825 }
826 
827 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
828 {
829         struct g2d_runqueue_node *runqueue_node;
830 
831         if (list_empty(&g2d->runqueue))
832                 return NULL;
833 
834         runqueue_node = list_first_entry(&g2d->runqueue,
835                                          struct g2d_runqueue_node, list);
836         list_del_init(&runqueue_node->list);
837         return runqueue_node;
838 }
839 
840 static void g2d_free_runqueue_node(struct g2d_data *g2d,
841                                    struct g2d_runqueue_node *runqueue_node)
842 {
843         struct g2d_cmdlist_node *node;
844 
845         if (!runqueue_node)
846                 return;
847 
848         mutex_lock(&g2d->cmdlist_mutex);
849         /*
850          * commands in run_cmdlist have been completed so unmap all gem
851          * objects in each command node so that they are unreferenced.
852          */
853         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
854                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
855         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
856         mutex_unlock(&g2d->cmdlist_mutex);
857 
858         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
859 }
860 
861 static void g2d_exec_runqueue(struct g2d_data *g2d)
862 {
863         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
864         if (g2d->runqueue_node)
865                 g2d_dma_start(g2d, g2d->runqueue_node);
866 }
867 
868 static void g2d_runqueue_worker(struct work_struct *work)
869 {
870         struct g2d_data *g2d = container_of(work, struct g2d_data,
871                                             runqueue_work);
872 
873         mutex_lock(&g2d->runqueue_mutex);
874         pm_runtime_put_sync(g2d->dev);
875 
876         complete(&g2d->runqueue_node->complete);
877         if (g2d->runqueue_node->async)
878                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
879 
880         if (g2d->suspended)
881                 g2d->runqueue_node = NULL;
882         else
883                 g2d_exec_runqueue(g2d);
884         mutex_unlock(&g2d->runqueue_mutex);
885 }
886 
887 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
888 {
889         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
890         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
891         struct drm_exynos_pending_g2d_event *e;
892         struct timeval now;
893         unsigned long flags;
894 
895         if (list_empty(&runqueue_node->event_list))
896                 return;
897 
898         e = list_first_entry(&runqueue_node->event_list,
899                              struct drm_exynos_pending_g2d_event, base.link);
900 
901         do_gettimeofday(&now);
902         e->event.tv_sec = now.tv_sec;
903         e->event.tv_usec = now.tv_usec;
904         e->event.cmdlist_no = cmdlist_no;
905 
906         spin_lock_irqsave(&drm_dev->event_lock, flags);
907         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
908         wake_up_interruptible(&e->base.file_priv->event_wait);
909         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
910 }
911 
912 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
913 {
914         struct g2d_data *g2d = dev_id;
915         u32 pending;
916 
917         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
918         if (pending)
919                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
920 
921         if (pending & G2D_INTP_GCMD_FIN) {
922                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
923 
924                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
925                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
926 
927                 g2d_finish_event(g2d, cmdlist_no);
928 
929                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
930                 if (!(pending & G2D_INTP_ACMD_FIN)) {
931                         writel_relaxed(G2D_DMA_CONTINUE,
932                                         g2d->regs + G2D_DMA_COMMAND);
933                 }
934         }
935 
936         if (pending & G2D_INTP_ACMD_FIN)
937                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
938 
939         return IRQ_HANDLED;
940 }
941 
942 static int g2d_check_reg_offset(struct device *dev,
943                                 struct g2d_cmdlist_node *node,
944                                 int nr, bool for_addr)
945 {
946         struct g2d_cmdlist *cmdlist = node->cmdlist;
947         int reg_offset;
948         int index;
949         int i;
950 
951         for (i = 0; i < nr; i++) {
952                 struct g2d_buf_info *buf_info = &node->buf_info;
953                 struct g2d_buf_desc *buf_desc;
954                 enum g2d_reg_type reg_type;
955                 unsigned long value;
956 
957                 index = cmdlist->last - 2 * (i + 1);
958 
959                 reg_offset = cmdlist->data[index] & ~0xfffff000;
960                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
961                         goto err;
962                 if (reg_offset % 4)
963                         goto err;
964 
965                 switch (reg_offset) {
966                 case G2D_SRC_BASE_ADDR:
967                 case G2D_SRC_PLANE2_BASE_ADDR:
968                 case G2D_DST_BASE_ADDR:
969                 case G2D_DST_PLANE2_BASE_ADDR:
970                 case G2D_PAT_BASE_ADDR:
971                 case G2D_MSK_BASE_ADDR:
972                         if (!for_addr)
973                                 goto err;
974 
975                         reg_type = g2d_get_reg_type(reg_offset);
976                         if (reg_type == REG_TYPE_NONE)
977                                 goto err;
978 
979                         /* check userptr buffer type. */
980                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
981                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
982                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
983                         } else
984                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
985                         break;
986                 case G2D_SRC_COLOR_MODE:
987                 case G2D_DST_COLOR_MODE:
988                         if (for_addr)
989                                 goto err;
990 
991                         reg_type = g2d_get_reg_type(reg_offset);
992                         if (reg_type == REG_TYPE_NONE)
993                                 goto err;
994 
995                         buf_desc = &buf_info->descs[reg_type];
996                         value = cmdlist->data[index + 1];
997 
998                         buf_desc->format = value & 0xf;
999                         break;
1000                 case G2D_SRC_LEFT_TOP:
1001                 case G2D_DST_LEFT_TOP:
1002                         if (for_addr)
1003                                 goto err;
1004 
1005                         reg_type = g2d_get_reg_type(reg_offset);
1006                         if (reg_type == REG_TYPE_NONE)
1007                                 goto err;
1008 
1009                         buf_desc = &buf_info->descs[reg_type];
1010                         value = cmdlist->data[index + 1];
1011 
1012                         buf_desc->left_x = value & 0x1fff;
1013                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1014                         break;
1015                 case G2D_SRC_RIGHT_BOTTOM:
1016                 case G2D_DST_RIGHT_BOTTOM:
1017                         if (for_addr)
1018                                 goto err;
1019 
1020                         reg_type = g2d_get_reg_type(reg_offset);
1021                         if (reg_type == REG_TYPE_NONE)
1022                                 goto err;
1023 
1024                         buf_desc = &buf_info->descs[reg_type];
1025                         value = cmdlist->data[index + 1];
1026 
1027                         buf_desc->right_x = value & 0x1fff;
1028                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1029                         break;
1030                 default:
1031                         if (for_addr)
1032                                 goto err;
1033                         break;
1034                 }
1035         }
1036 
1037         return 0;
1038 
1039 err:
1040         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1041         return -EINVAL;
1042 }
1043 
1044 /* ioctl functions */
1045 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1046                              struct drm_file *file)
1047 {
1048         struct drm_exynos_file_private *file_priv = file->driver_priv;
1049         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1050         struct device *dev;
1051         struct g2d_data *g2d;
1052         struct drm_exynos_g2d_get_ver *ver = data;
1053 
1054         if (!g2d_priv)
1055                 return -ENODEV;
1056 
1057         dev = g2d_priv->dev;
1058         if (!dev)
1059                 return -ENODEV;
1060 
1061         g2d = dev_get_drvdata(dev);
1062         if (!g2d)
1063                 return -EFAULT;
1064 
1065         ver->major = G2D_HW_MAJOR_VER;
1066         ver->minor = G2D_HW_MINOR_VER;
1067 
1068         return 0;
1069 }
1070 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1071 
1072 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1073                                  struct drm_file *file)
1074 {
1075         struct drm_exynos_file_private *file_priv = file->driver_priv;
1076         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1077         struct device *dev;
1078         struct g2d_data *g2d;
1079         struct drm_exynos_g2d_set_cmdlist *req = data;
1080         struct drm_exynos_g2d_cmd *cmd;
1081         struct drm_exynos_pending_g2d_event *e;
1082         struct g2d_cmdlist_node *node;
1083         struct g2d_cmdlist *cmdlist;
1084         unsigned long flags;
1085         int size;
1086         int ret;
1087 
1088         if (!g2d_priv)
1089                 return -ENODEV;
1090 
1091         dev = g2d_priv->dev;
1092         if (!dev)
1093                 return -ENODEV;
1094 
1095         g2d = dev_get_drvdata(dev);
1096         if (!g2d)
1097                 return -EFAULT;
1098 
1099         node = g2d_get_cmdlist(g2d);
1100         if (!node)
1101                 return -ENOMEM;
1102 
1103         node->event = NULL;
1104 
1105         if (req->event_type != G2D_EVENT_NOT) {
1106                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1107                 if (file->event_space < sizeof(e->event)) {
1108                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1109                         ret = -ENOMEM;
1110                         goto err;
1111                 }
1112                 file->event_space -= sizeof(e->event);
1113                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1114 
1115                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1116                 if (!e) {
1117                         spin_lock_irqsave(&drm_dev->event_lock, flags);
1118                         file->event_space += sizeof(e->event);
1119                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1120 
1121                         ret = -ENOMEM;
1122                         goto err;
1123                 }
1124 
1125                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1126                 e->event.base.length = sizeof(e->event);
1127                 e->event.user_data = req->user_data;
1128                 e->base.event = &e->event.base;
1129                 e->base.file_priv = file;
1130                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1131 
1132                 node->event = e;
1133         }
1134 
1135         cmdlist = node->cmdlist;
1136 
1137         cmdlist->last = 0;
1138 
1139         /*
1140          * If don't clear SFR registers, the cmdlist is affected by register
1141          * values of previous cmdlist. G2D hw executes SFR clear command and
1142          * a next command at the same time then the next command is ignored and
1143          * is executed rightly from next next command, so needs a dummy command
1144          * to next command of SFR clear command.
1145          */
1146         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1147         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1148         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1149         cmdlist->data[cmdlist->last++] = 0;
1150 
1151         /*
1152          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1153          * and GCF bit should be set to INTEN register if user wants
1154          * G2D interrupt event once current command list execution is
1155          * finished.
1156          * Otherwise only ACF bit should be set to INTEN register so
1157          * that one interrupt is occurred after all command lists
1158          * have been completed.
1159          */
1160         if (node->event) {
1161                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1162                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1163                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1164                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1165         } else {
1166                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1167                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1168         }
1169 
1170         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1171         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1172         if (size > G2D_CMDLIST_DATA_NUM) {
1173                 dev_err(dev, "cmdlist size is too big\n");
1174                 ret = -EINVAL;
1175                 goto err_free_event;
1176         }
1177 
1178         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1179 
1180         if (copy_from_user(cmdlist->data + cmdlist->last,
1181                                 (void __user *)cmd,
1182                                 sizeof(*cmd) * req->cmd_nr)) {
1183                 ret = -EFAULT;
1184                 goto err_free_event;
1185         }
1186         cmdlist->last += req->cmd_nr * 2;
1187 
1188         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1189         if (ret < 0)
1190                 goto err_free_event;
1191 
1192         node->buf_info.map_nr = req->cmd_buf_nr;
1193         if (req->cmd_buf_nr) {
1194                 struct drm_exynos_g2d_cmd *cmd_buf;
1195 
1196                 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1197 
1198                 if (copy_from_user(cmdlist->data + cmdlist->last,
1199                                         (void __user *)cmd_buf,
1200                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1201                         ret = -EFAULT;
1202                         goto err_free_event;
1203                 }
1204                 cmdlist->last += req->cmd_buf_nr * 2;
1205 
1206                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1207                 if (ret < 0)
1208                         goto err_free_event;
1209 
1210                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1211                 if (ret < 0)
1212                         goto err_unmap;
1213         }
1214 
1215         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1216         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1217 
1218         /* head */
1219         cmdlist->head = cmdlist->last / 2;
1220 
1221         /* tail */
1222         cmdlist->data[cmdlist->last] = 0;
1223 
1224         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1225 
1226         return 0;
1227 
1228 err_unmap:
1229         g2d_unmap_cmdlist_gem(g2d, node, file);
1230 err_free_event:
1231         if (node->event) {
1232                 spin_lock_irqsave(&drm_dev->event_lock, flags);
1233                 file->event_space += sizeof(e->event);
1234                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1235                 kfree(node->event);
1236         }
1237 err:
1238         g2d_put_cmdlist(g2d, node);
1239         return ret;
1240 }
1241 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1242 
1243 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1244                           struct drm_file *file)
1245 {
1246         struct drm_exynos_file_private *file_priv = file->driver_priv;
1247         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1248         struct device *dev;
1249         struct g2d_data *g2d;
1250         struct drm_exynos_g2d_exec *req = data;
1251         struct g2d_runqueue_node *runqueue_node;
1252         struct list_head *run_cmdlist;
1253         struct list_head *event_list;
1254 
1255         if (!g2d_priv)
1256                 return -ENODEV;
1257 
1258         dev = g2d_priv->dev;
1259         if (!dev)
1260                 return -ENODEV;
1261 
1262         g2d = dev_get_drvdata(dev);
1263         if (!g2d)
1264                 return -EFAULT;
1265 
1266         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1267         if (!runqueue_node) {
1268                 dev_err(dev, "failed to allocate memory\n");
1269                 return -ENOMEM;
1270         }
1271         run_cmdlist = &runqueue_node->run_cmdlist;
1272         event_list = &runqueue_node->event_list;
1273         INIT_LIST_HEAD(run_cmdlist);
1274         INIT_LIST_HEAD(event_list);
1275         init_completion(&runqueue_node->complete);
1276         runqueue_node->async = req->async;
1277 
1278         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1279         list_splice_init(&g2d_priv->event_list, event_list);
1280 
1281         if (list_empty(run_cmdlist)) {
1282                 dev_err(dev, "there is no inuse cmdlist\n");
1283                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1284                 return -EPERM;
1285         }
1286 
1287         mutex_lock(&g2d->runqueue_mutex);
1288         runqueue_node->pid = current->pid;
1289         runqueue_node->filp = file;
1290         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1291         if (!g2d->runqueue_node)
1292                 g2d_exec_runqueue(g2d);
1293         mutex_unlock(&g2d->runqueue_mutex);
1294 
1295         if (runqueue_node->async)
1296                 goto out;
1297 
1298         wait_for_completion(&runqueue_node->complete);
1299         g2d_free_runqueue_node(g2d, runqueue_node);
1300 
1301 out:
1302         return 0;
1303 }
1304 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1305 
1306 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1307 {
1308         struct g2d_data *g2d;
1309         int ret;
1310 
1311         g2d = dev_get_drvdata(dev);
1312         if (!g2d)
1313                 return -EFAULT;
1314 
1315         /* allocate dma-aware cmdlist buffer. */
1316         ret = g2d_init_cmdlist(g2d);
1317         if (ret < 0) {
1318                 dev_err(dev, "cmdlist init failed\n");
1319                 return ret;
1320         }
1321 
1322         if (!is_drm_iommu_supported(drm_dev))
1323                 return 0;
1324 
1325         ret = drm_iommu_attach_device(drm_dev, dev);
1326         if (ret < 0) {
1327                 dev_err(dev, "failed to enable iommu.\n");
1328                 g2d_fini_cmdlist(g2d);
1329         }
1330 
1331         return ret;
1332 
1333 }
1334 
1335 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1336 {
1337         if (!is_drm_iommu_supported(drm_dev))
1338                 return;
1339 
1340         drm_iommu_detach_device(drm_dev, dev);
1341 }
1342 
1343 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1344                         struct drm_file *file)
1345 {
1346         struct drm_exynos_file_private *file_priv = file->driver_priv;
1347         struct exynos_drm_g2d_private *g2d_priv;
1348 
1349         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1350         if (!g2d_priv)
1351                 return -ENOMEM;
1352 
1353         g2d_priv->dev = dev;
1354         file_priv->g2d_priv = g2d_priv;
1355 
1356         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1357         INIT_LIST_HEAD(&g2d_priv->event_list);
1358         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1359 
1360         return 0;
1361 }
1362 
1363 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1364                         struct drm_file *file)
1365 {
1366         struct drm_exynos_file_private *file_priv = file->driver_priv;
1367         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1368         struct g2d_data *g2d;
1369         struct g2d_cmdlist_node *node, *n;
1370 
1371         if (!dev)
1372                 return;
1373 
1374         g2d = dev_get_drvdata(dev);
1375         if (!g2d)
1376                 return;
1377 
1378         mutex_lock(&g2d->cmdlist_mutex);
1379         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1380                 /*
1381                  * unmap all gem objects not completed.
1382                  *
1383                  * P.S. if current process was terminated forcely then
1384                  * there may be some commands in inuse_cmdlist so unmap
1385                  * them.
1386                  */
1387                 g2d_unmap_cmdlist_gem(g2d, node, file);
1388                 list_move_tail(&node->list, &g2d->free_cmdlist);
1389         }
1390         mutex_unlock(&g2d->cmdlist_mutex);
1391 
1392         /* release all g2d_userptr in pool. */
1393         g2d_userptr_free_all(drm_dev, g2d, file);
1394 
1395         kfree(file_priv->g2d_priv);
1396 }
1397 
1398 static int g2d_probe(struct platform_device *pdev)
1399 {
1400         struct device *dev = &pdev->dev;
1401         struct resource *res;
1402         struct g2d_data *g2d;
1403         struct exynos_drm_subdrv *subdrv;
1404         int ret;
1405 
1406         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1407         if (!g2d)
1408                 return -ENOMEM;
1409 
1410         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1411                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1412         if (!g2d->runqueue_slab)
1413                 return -ENOMEM;
1414 
1415         g2d->dev = dev;
1416 
1417         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1418         if (!g2d->g2d_workq) {
1419                 dev_err(dev, "failed to create workqueue\n");
1420                 ret = -EINVAL;
1421                 goto err_destroy_slab;
1422         }
1423 
1424         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1425         INIT_LIST_HEAD(&g2d->free_cmdlist);
1426         INIT_LIST_HEAD(&g2d->runqueue);
1427 
1428         mutex_init(&g2d->cmdlist_mutex);
1429         mutex_init(&g2d->runqueue_mutex);
1430 
1431         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1432         if (IS_ERR(g2d->gate_clk)) {
1433                 dev_err(dev, "failed to get gate clock\n");
1434                 ret = PTR_ERR(g2d->gate_clk);
1435                 goto err_destroy_workqueue;
1436         }
1437 
1438         pm_runtime_enable(dev);
1439 
1440         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1441 
1442         g2d->regs = devm_ioremap_resource(dev, res);
1443         if (IS_ERR(g2d->regs)) {
1444                 ret = PTR_ERR(g2d->regs);
1445                 goto err_put_clk;
1446         }
1447 
1448         g2d->irq = platform_get_irq(pdev, 0);
1449         if (g2d->irq < 0) {
1450                 dev_err(dev, "failed to get irq\n");
1451                 ret = g2d->irq;
1452                 goto err_put_clk;
1453         }
1454 
1455         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1456                                                                 "drm_g2d", g2d);
1457         if (ret < 0) {
1458                 dev_err(dev, "irq request failed\n");
1459                 goto err_put_clk;
1460         }
1461 
1462         g2d->max_pool = MAX_POOL;
1463 
1464         platform_set_drvdata(pdev, g2d);
1465 
1466         subdrv = &g2d->subdrv;
1467         subdrv->dev = dev;
1468         subdrv->probe = g2d_subdrv_probe;
1469         subdrv->remove = g2d_subdrv_remove;
1470         subdrv->open = g2d_open;
1471         subdrv->close = g2d_close;
1472 
1473         ret = exynos_drm_subdrv_register(subdrv);
1474         if (ret < 0) {
1475                 dev_err(dev, "failed to register drm g2d device\n");
1476                 goto err_put_clk;
1477         }
1478 
1479         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1480                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1481 
1482         return 0;
1483 
1484 err_put_clk:
1485         pm_runtime_disable(dev);
1486 err_destroy_workqueue:
1487         destroy_workqueue(g2d->g2d_workq);
1488 err_destroy_slab:
1489         kmem_cache_destroy(g2d->runqueue_slab);
1490         return ret;
1491 }
1492 
1493 static int g2d_remove(struct platform_device *pdev)
1494 {
1495         struct g2d_data *g2d = platform_get_drvdata(pdev);
1496 
1497         cancel_work_sync(&g2d->runqueue_work);
1498         exynos_drm_subdrv_unregister(&g2d->subdrv);
1499 
1500         while (g2d->runqueue_node) {
1501                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1502                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1503         }
1504 
1505         pm_runtime_disable(&pdev->dev);
1506 
1507         g2d_fini_cmdlist(g2d);
1508         destroy_workqueue(g2d->g2d_workq);
1509         kmem_cache_destroy(g2d->runqueue_slab);
1510 
1511         return 0;
1512 }
1513 
1514 #ifdef CONFIG_PM_SLEEP
1515 static int g2d_suspend(struct device *dev)
1516 {
1517         struct g2d_data *g2d = dev_get_drvdata(dev);
1518 
1519         mutex_lock(&g2d->runqueue_mutex);
1520         g2d->suspended = true;
1521         mutex_unlock(&g2d->runqueue_mutex);
1522 
1523         while (g2d->runqueue_node)
1524                 /* FIXME: good range? */
1525                 usleep_range(500, 1000);
1526 
1527         flush_work(&g2d->runqueue_work);
1528 
1529         return 0;
1530 }
1531 
1532 static int g2d_resume(struct device *dev)
1533 {
1534         struct g2d_data *g2d = dev_get_drvdata(dev);
1535 
1536         g2d->suspended = false;
1537         g2d_exec_runqueue(g2d);
1538 
1539         return 0;
1540 }
1541 #endif
1542 
1543 #ifdef CONFIG_PM_RUNTIME
1544 static int g2d_runtime_suspend(struct device *dev)
1545 {
1546         struct g2d_data *g2d = dev_get_drvdata(dev);
1547 
1548         clk_disable_unprepare(g2d->gate_clk);
1549 
1550         return 0;
1551 }
1552 
1553 static int g2d_runtime_resume(struct device *dev)
1554 {
1555         struct g2d_data *g2d = dev_get_drvdata(dev);
1556         int ret;
1557 
1558         ret = clk_prepare_enable(g2d->gate_clk);
1559         if (ret < 0)
1560                 dev_warn(dev, "failed to enable clock.\n");
1561 
1562         return ret;
1563 }
1564 #endif
1565 
1566 static const struct dev_pm_ops g2d_pm_ops = {
1567         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1568         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1569 };
1570 
1571 static const struct of_device_id exynos_g2d_match[] = {
1572         { .compatible = "samsung,exynos5250-g2d" },
1573         { .compatible = "samsung,exynos4212-g2d" },
1574         {},
1575 };
1576 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1577 
1578 struct platform_driver g2d_driver = {
1579         .probe          = g2d_probe,
1580         .remove         = g2d_remove,
1581         .driver         = {
1582                 .name   = "s5p-g2d",
1583                 .owner  = THIS_MODULE,
1584                 .pm     = &g2d_pm_ops,
1585                 .of_match_table = exynos_g2d_match,
1586         },
1587 };
1588 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us