Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 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

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

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