Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

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_STRIDE_REG              0x0308
 52 #define G2D_SRC_COLOR_MODE              0x030C
 53 #define G2D_SRC_LEFT_TOP                0x0310
 54 #define G2D_SRC_RIGHT_BOTTOM            0x0314
 55 #define G2D_SRC_PLANE2_BASE_ADDR        0x0318
 56 #define G2D_DST_BASE_ADDR               0x0404
 57 #define G2D_DST_STRIDE_REG              0x0408
 58 #define G2D_DST_COLOR_MODE              0x040C
 59 #define G2D_DST_LEFT_TOP                0x0410
 60 #define G2D_DST_RIGHT_BOTTOM            0x0414
 61 #define G2D_DST_PLANE2_BASE_ADDR        0x0418
 62 #define G2D_PAT_BASE_ADDR               0x0500
 63 #define G2D_MSK_BASE_ADDR               0x0520
 64 
 65 /* G2D_SOFT_RESET */
 66 #define G2D_SFRCLEAR                    (1 << 1)
 67 #define G2D_R                           (1 << 0)
 68 
 69 /* G2D_INTEN */
 70 #define G2D_INTEN_ACF                   (1 << 3)
 71 #define G2D_INTEN_UCF                   (1 << 2)
 72 #define G2D_INTEN_GCF                   (1 << 1)
 73 #define G2D_INTEN_SCF                   (1 << 0)
 74 
 75 /* G2D_INTC_PEND */
 76 #define G2D_INTP_ACMD_FIN               (1 << 3)
 77 #define G2D_INTP_UCMD_FIN               (1 << 2)
 78 #define G2D_INTP_GCMD_FIN               (1 << 1)
 79 #define G2D_INTP_SCMD_FIN               (1 << 0)
 80 
 81 /* G2D_DMA_COMMAND */
 82 #define G2D_DMA_HALT                    (1 << 2)
 83 #define G2D_DMA_CONTINUE                (1 << 1)
 84 #define G2D_DMA_START                   (1 << 0)
 85 
 86 /* G2D_DMA_STATUS */
 87 #define G2D_DMA_LIST_DONE_COUNT         (0xFF << 17)
 88 #define G2D_DMA_BITBLT_DONE_COUNT       (0xFFFF << 1)
 89 #define G2D_DMA_DONE                    (1 << 0)
 90 #define G2D_DMA_LIST_DONE_COUNT_OFFSET  17
 91 
 92 /* G2D_DMA_HOLD_CMD */
 93 #define G2D_USER_HOLD                   (1 << 2)
 94 #define G2D_LIST_HOLD                   (1 << 1)
 95 #define G2D_BITBLT_HOLD                 (1 << 0)
 96 
 97 /* G2D_BITBLT_START */
 98 #define G2D_START_CASESEL               (1 << 2)
 99 #define G2D_START_NHOLT                 (1 << 1)
100 #define G2D_START_BITBLT                (1 << 0)
101 
102 /* buffer color format */
103 #define G2D_FMT_XRGB8888                0
104 #define G2D_FMT_ARGB8888                1
105 #define G2D_FMT_RGB565                  2
106 #define G2D_FMT_XRGB1555                3
107 #define G2D_FMT_ARGB1555                4
108 #define G2D_FMT_XRGB4444                5
109 #define G2D_FMT_ARGB4444                6
110 #define G2D_FMT_PACKED_RGB888           7
111 #define G2D_FMT_A8                      11
112 #define G2D_FMT_L8                      12
113 
114 /* buffer valid length */
115 #define G2D_LEN_MIN                     1
116 #define G2D_LEN_MAX                     8000
117 
118 #define G2D_CMDLIST_SIZE                (PAGE_SIZE / 4)
119 #define G2D_CMDLIST_NUM                 64
120 #define G2D_CMDLIST_POOL_SIZE           (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
121 #define G2D_CMDLIST_DATA_NUM            (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
122 
123 /* maximum buffer pool size of userptr is 64MB as default */
124 #define MAX_POOL                (64 * 1024 * 1024)
125 
126 enum {
127         BUF_TYPE_GEM = 1,
128         BUF_TYPE_USERPTR,
129 };
130 
131 enum g2d_reg_type {
132         REG_TYPE_NONE = -1,
133         REG_TYPE_SRC,
134         REG_TYPE_SRC_PLANE2,
135         REG_TYPE_DST,
136         REG_TYPE_DST_PLANE2,
137         REG_TYPE_PAT,
138         REG_TYPE_MSK,
139         MAX_REG_TYPE_NR
140 };
141 
142 /* cmdlist data structure */
143 struct g2d_cmdlist {
144         u32             head;
145         unsigned long   data[G2D_CMDLIST_DATA_NUM];
146         u32             last;   /* last data offset */
147 };
148 
149 /*
150  * A structure of buffer description
151  *
152  * @format: color format
153  * @stride: buffer stride/pitch in bytes
154  * @left_x: the x coordinates of left top corner
155  * @top_y: the y coordinates of left top corner
156  * @right_x: the x coordinates of right bottom corner
157  * @bottom_y: the y coordinates of right bottom corner
158  *
159  */
160 struct g2d_buf_desc {
161         unsigned int    format;
162         unsigned int    stride;
163         unsigned int    left_x;
164         unsigned int    top_y;
165         unsigned int    right_x;
166         unsigned int    bottom_y;
167 };
168 
169 /*
170  * A structure of buffer information
171  *
172  * @map_nr: manages the number of mapped buffers
173  * @reg_types: stores regitster type in the order of requested command
174  * @handles: stores buffer handle in its reg_type position
175  * @types: stores buffer type in its reg_type position
176  * @descs: stores buffer description in its reg_type position
177  *
178  */
179 struct g2d_buf_info {
180         unsigned int            map_nr;
181         enum g2d_reg_type       reg_types[MAX_REG_TYPE_NR];
182         unsigned long           handles[MAX_REG_TYPE_NR];
183         unsigned int            types[MAX_REG_TYPE_NR];
184         struct g2d_buf_desc     descs[MAX_REG_TYPE_NR];
185 };
186 
187 struct drm_exynos_pending_g2d_event {
188         struct drm_pending_event        base;
189         struct drm_exynos_g2d_event     event;
190 };
191 
192 struct g2d_cmdlist_userptr {
193         struct list_head        list;
194         dma_addr_t              dma_addr;
195         unsigned long           userptr;
196         unsigned long           size;
197         struct frame_vector     *vec;
198         struct sg_table         *sgt;
199         atomic_t                refcount;
200         bool                    in_pool;
201         bool                    out_of_list;
202 };
203 struct g2d_cmdlist_node {
204         struct list_head        list;
205         struct g2d_cmdlist      *cmdlist;
206         dma_addr_t              dma_addr;
207         struct g2d_buf_info     buf_info;
208 
209         struct drm_exynos_pending_g2d_event     *event;
210 };
211 
212 struct g2d_runqueue_node {
213         struct list_head        list;
214         struct list_head        run_cmdlist;
215         struct list_head        event_list;
216         struct drm_file         *filp;
217         pid_t                   pid;
218         struct completion       complete;
219         int                     async;
220 };
221 
222 struct g2d_data {
223         struct device                   *dev;
224         struct clk                      *gate_clk;
225         void __iomem                    *regs;
226         int                             irq;
227         struct workqueue_struct         *g2d_workq;
228         struct work_struct              runqueue_work;
229         struct exynos_drm_subdrv        subdrv;
230         bool                            suspended;
231 
232         /* cmdlist */
233         struct g2d_cmdlist_node         *cmdlist_node;
234         struct list_head                free_cmdlist;
235         struct mutex                    cmdlist_mutex;
236         dma_addr_t                      cmdlist_pool;
237         void                            *cmdlist_pool_virt;
238         struct dma_attrs                cmdlist_dma_attrs;
239 
240         /* runqueue*/
241         struct g2d_runqueue_node        *runqueue_node;
242         struct list_head                runqueue;
243         struct mutex                    runqueue_mutex;
244         struct kmem_cache               *runqueue_slab;
245 
246         unsigned long                   current_pool;
247         unsigned long                   max_pool;
248 };
249 
250 static int g2d_init_cmdlist(struct g2d_data *g2d)
251 {
252         struct device *dev = g2d->dev;
253         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
254         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
255         int nr;
256         int ret;
257         struct g2d_buf_info *buf_info;
258 
259         init_dma_attrs(&g2d->cmdlist_dma_attrs);
260         dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
261 
262         g2d->cmdlist_pool_virt = dma_alloc_attrs(to_dma_dev(subdrv->drm_dev),
263                                                 G2D_CMDLIST_POOL_SIZE,
264                                                 &g2d->cmdlist_pool, GFP_KERNEL,
265                                                 &g2d->cmdlist_dma_attrs);
266         if (!g2d->cmdlist_pool_virt) {
267                 dev_err(dev, "failed to allocate dma memory\n");
268                 return -ENOMEM;
269         }
270 
271         node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
272         if (!node) {
273                 dev_err(dev, "failed to allocate memory\n");
274                 ret = -ENOMEM;
275                 goto err;
276         }
277 
278         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
279                 unsigned int i;
280 
281                 node[nr].cmdlist =
282                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
283                 node[nr].dma_addr =
284                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
285 
286                 buf_info = &node[nr].buf_info;
287                 for (i = 0; i < MAX_REG_TYPE_NR; i++)
288                         buf_info->reg_types[i] = REG_TYPE_NONE;
289 
290                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
291         }
292 
293         return 0;
294 
295 err:
296         dma_free_attrs(to_dma_dev(subdrv->drm_dev), G2D_CMDLIST_POOL_SIZE,
297                         g2d->cmdlist_pool_virt,
298                         g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
299         return ret;
300 }
301 
302 static void g2d_fini_cmdlist(struct g2d_data *g2d)
303 {
304         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
305 
306         kfree(g2d->cmdlist_node);
307 
308         if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
309                 dma_free_attrs(to_dma_dev(subdrv->drm_dev),
310                                 G2D_CMDLIST_POOL_SIZE,
311                                 g2d->cmdlist_pool_virt,
312                                 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
313         }
314 }
315 
316 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
317 {
318         struct device *dev = g2d->dev;
319         struct g2d_cmdlist_node *node;
320 
321         mutex_lock(&g2d->cmdlist_mutex);
322         if (list_empty(&g2d->free_cmdlist)) {
323                 dev_err(dev, "there is no free cmdlist\n");
324                 mutex_unlock(&g2d->cmdlist_mutex);
325                 return NULL;
326         }
327 
328         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
329                                 list);
330         list_del_init(&node->list);
331         mutex_unlock(&g2d->cmdlist_mutex);
332 
333         return node;
334 }
335 
336 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
337 {
338         mutex_lock(&g2d->cmdlist_mutex);
339         list_move_tail(&node->list, &g2d->free_cmdlist);
340         mutex_unlock(&g2d->cmdlist_mutex);
341 }
342 
343 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
344                                      struct g2d_cmdlist_node *node)
345 {
346         struct g2d_cmdlist_node *lnode;
347 
348         if (list_empty(&g2d_priv->inuse_cmdlist))
349                 goto add_to_list;
350 
351         /* this links to base address of new cmdlist */
352         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
353                                 struct g2d_cmdlist_node, list);
354         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
355 
356 add_to_list:
357         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
358 
359         if (node->event)
360                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
361 }
362 
363 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
364                                         unsigned long obj,
365                                         bool force)
366 {
367         struct g2d_cmdlist_userptr *g2d_userptr =
368                                         (struct g2d_cmdlist_userptr *)obj;
369         struct page **pages;
370 
371         if (!obj)
372                 return;
373 
374         if (force)
375                 goto out;
376 
377         atomic_dec(&g2d_userptr->refcount);
378 
379         if (atomic_read(&g2d_userptr->refcount) > 0)
380                 return;
381 
382         if (g2d_userptr->in_pool)
383                 return;
384 
385 out:
386         exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
387                                         DMA_BIDIRECTIONAL);
388 
389         pages = frame_vector_pages(g2d_userptr->vec);
390         if (!IS_ERR(pages)) {
391                 int i;
392 
393                 for (i = 0; i < frame_vector_count(g2d_userptr->vec); i++)
394                         set_page_dirty_lock(pages[i]);
395         }
396         put_vaddr_frames(g2d_userptr->vec);
397         frame_vector_destroy(g2d_userptr->vec);
398 
399         if (!g2d_userptr->out_of_list)
400                 list_del_init(&g2d_userptr->list);
401 
402         sg_free_table(g2d_userptr->sgt);
403         kfree(g2d_userptr->sgt);
404         kfree(g2d_userptr);
405 }
406 
407 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
408                                         unsigned long userptr,
409                                         unsigned long size,
410                                         struct drm_file *filp,
411                                         unsigned long *obj)
412 {
413         struct drm_exynos_file_private *file_priv = filp->driver_priv;
414         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
415         struct g2d_cmdlist_userptr *g2d_userptr;
416         struct g2d_data *g2d;
417         struct sg_table *sgt;
418         unsigned long start, end;
419         unsigned int npages, offset;
420         int ret;
421 
422         if (!size) {
423                 DRM_ERROR("invalid userptr size.\n");
424                 return ERR_PTR(-EINVAL);
425         }
426 
427         g2d = dev_get_drvdata(g2d_priv->dev);
428 
429         /* check if userptr already exists in userptr_list. */
430         list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
431                 if (g2d_userptr->userptr == userptr) {
432                         /*
433                          * also check size because there could be same address
434                          * and different size.
435                          */
436                         if (g2d_userptr->size == size) {
437                                 atomic_inc(&g2d_userptr->refcount);
438                                 *obj = (unsigned long)g2d_userptr;
439 
440                                 return &g2d_userptr->dma_addr;
441                         }
442 
443                         /*
444                          * at this moment, maybe g2d dma is accessing this
445                          * g2d_userptr memory region so just remove this
446                          * g2d_userptr object from userptr_list not to be
447                          * referred again and also except it the userptr
448                          * pool to be released after the dma access completion.
449                          */
450                         g2d_userptr->out_of_list = true;
451                         g2d_userptr->in_pool = false;
452                         list_del_init(&g2d_userptr->list);
453 
454                         break;
455                 }
456         }
457 
458         g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
459         if (!g2d_userptr)
460                 return ERR_PTR(-ENOMEM);
461 
462         atomic_set(&g2d_userptr->refcount, 1);
463         g2d_userptr->size = size;
464 
465         start = userptr & PAGE_MASK;
466         offset = userptr & ~PAGE_MASK;
467         end = PAGE_ALIGN(userptr + size);
468         npages = (end - start) >> PAGE_SHIFT;
469         g2d_userptr->vec = frame_vector_create(npages);
470         if (!g2d_userptr->vec) {
471                 ret = -ENOMEM;
472                 goto err_free;
473         }
474 
475         ret = get_vaddr_frames(start, npages, true, true, g2d_userptr->vec);
476         if (ret != npages) {
477                 DRM_ERROR("failed to get user pages from userptr.\n");
478                 if (ret < 0)
479                         goto err_destroy_framevec;
480                 ret = -EFAULT;
481                 goto err_put_framevec;
482         }
483         if (frame_vector_to_pages(g2d_userptr->vec) < 0) {
484                 ret = -EFAULT;
485                 goto err_put_framevec;
486         }
487 
488         sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
489         if (!sgt) {
490                 ret = -ENOMEM;
491                 goto err_put_framevec;
492         }
493 
494         ret = sg_alloc_table_from_pages(sgt,
495                                         frame_vector_pages(g2d_userptr->vec),
496                                         npages, offset, size, GFP_KERNEL);
497         if (ret < 0) {
498                 DRM_ERROR("failed to get sgt from pages.\n");
499                 goto err_free_sgt;
500         }
501 
502         g2d_userptr->sgt = sgt;
503 
504         ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
505                                                 DMA_BIDIRECTIONAL);
506         if (ret < 0) {
507                 DRM_ERROR("failed to map sgt with dma region.\n");
508                 goto err_sg_free_table;
509         }
510 
511         g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
512         g2d_userptr->userptr = userptr;
513 
514         list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
515 
516         if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
517                 g2d->current_pool += npages << PAGE_SHIFT;
518                 g2d_userptr->in_pool = true;
519         }
520 
521         *obj = (unsigned long)g2d_userptr;
522 
523         return &g2d_userptr->dma_addr;
524 
525 err_sg_free_table:
526         sg_free_table(sgt);
527 
528 err_free_sgt:
529         kfree(sgt);
530 
531 err_put_framevec:
532         put_vaddr_frames(g2d_userptr->vec);
533 
534 err_destroy_framevec:
535         frame_vector_destroy(g2d_userptr->vec);
536 
537 err_free:
538         kfree(g2d_userptr);
539 
540         return ERR_PTR(ret);
541 }
542 
543 static void g2d_userptr_free_all(struct drm_device *drm_dev,
544                                         struct g2d_data *g2d,
545                                         struct drm_file *filp)
546 {
547         struct drm_exynos_file_private *file_priv = filp->driver_priv;
548         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
549         struct g2d_cmdlist_userptr *g2d_userptr, *n;
550 
551         list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
552                 if (g2d_userptr->in_pool)
553                         g2d_userptr_put_dma_addr(drm_dev,
554                                                 (unsigned long)g2d_userptr,
555                                                 true);
556 
557         g2d->current_pool = 0;
558 }
559 
560 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
561 {
562         enum g2d_reg_type reg_type;
563 
564         switch (reg_offset) {
565         case G2D_SRC_BASE_ADDR:
566         case G2D_SRC_STRIDE_REG:
567         case G2D_SRC_COLOR_MODE:
568         case G2D_SRC_LEFT_TOP:
569         case G2D_SRC_RIGHT_BOTTOM:
570                 reg_type = REG_TYPE_SRC;
571                 break;
572         case G2D_SRC_PLANE2_BASE_ADDR:
573                 reg_type = REG_TYPE_SRC_PLANE2;
574                 break;
575         case G2D_DST_BASE_ADDR:
576         case G2D_DST_STRIDE_REG:
577         case G2D_DST_COLOR_MODE:
578         case G2D_DST_LEFT_TOP:
579         case G2D_DST_RIGHT_BOTTOM:
580                 reg_type = REG_TYPE_DST;
581                 break;
582         case G2D_DST_PLANE2_BASE_ADDR:
583                 reg_type = REG_TYPE_DST_PLANE2;
584                 break;
585         case G2D_PAT_BASE_ADDR:
586                 reg_type = REG_TYPE_PAT;
587                 break;
588         case G2D_MSK_BASE_ADDR:
589                 reg_type = REG_TYPE_MSK;
590                 break;
591         default:
592                 reg_type = REG_TYPE_NONE;
593                 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
594                 break;
595         }
596 
597         return reg_type;
598 }
599 
600 static unsigned long g2d_get_buf_bpp(unsigned int format)
601 {
602         unsigned long bpp;
603 
604         switch (format) {
605         case G2D_FMT_XRGB8888:
606         case G2D_FMT_ARGB8888:
607                 bpp = 4;
608                 break;
609         case G2D_FMT_RGB565:
610         case G2D_FMT_XRGB1555:
611         case G2D_FMT_ARGB1555:
612         case G2D_FMT_XRGB4444:
613         case G2D_FMT_ARGB4444:
614                 bpp = 2;
615                 break;
616         case G2D_FMT_PACKED_RGB888:
617                 bpp = 3;
618                 break;
619         default:
620                 bpp = 1;
621                 break;
622         }
623 
624         return bpp;
625 }
626 
627 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
628                                                 enum g2d_reg_type reg_type,
629                                                 unsigned long size)
630 {
631         int width, height;
632         unsigned long bpp, last_pos;
633 
634         /*
635          * check source and destination buffers only.
636          * so the others are always valid.
637          */
638         if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
639                 return true;
640 
641         /* This check also makes sure that right_x > left_x. */
642         width = (int)buf_desc->right_x - (int)buf_desc->left_x;
643         if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
644                 DRM_ERROR("width[%d] is out of range!\n", width);
645                 return false;
646         }
647 
648         /* This check also makes sure that bottom_y > top_y. */
649         height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
650         if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
651                 DRM_ERROR("height[%d] is out of range!\n", height);
652                 return false;
653         }
654 
655         bpp = g2d_get_buf_bpp(buf_desc->format);
656 
657         /* Compute the position of the last byte that the engine accesses. */
658         last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
659                 (unsigned long)buf_desc->stride +
660                 (unsigned long)buf_desc->right_x * bpp - 1;
661 
662         /*
663          * Since right_x > left_x and bottom_y > top_y we already know
664          * that the first_pos < last_pos (first_pos being the position
665          * of the first byte the engine accesses), it just remains to
666          * check if last_pos is smaller then the buffer size.
667          */
668 
669         if (last_pos >= size) {
670                 DRM_ERROR("last engine access position [%lu] "
671                         "is out of range [%lu]!\n", last_pos, size);
672                 return false;
673         }
674 
675         return true;
676 }
677 
678 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
679                                 struct g2d_cmdlist_node *node,
680                                 struct drm_device *drm_dev,
681                                 struct drm_file *file)
682 {
683         struct g2d_cmdlist *cmdlist = node->cmdlist;
684         struct g2d_buf_info *buf_info = &node->buf_info;
685         int offset;
686         int ret;
687         int i;
688 
689         for (i = 0; i < buf_info->map_nr; i++) {
690                 struct g2d_buf_desc *buf_desc;
691                 enum g2d_reg_type reg_type;
692                 int reg_pos;
693                 unsigned long handle;
694                 dma_addr_t *addr;
695 
696                 reg_pos = cmdlist->last - 2 * (i + 1);
697 
698                 offset = cmdlist->data[reg_pos];
699                 handle = cmdlist->data[reg_pos + 1];
700 
701                 reg_type = g2d_get_reg_type(offset);
702                 if (reg_type == REG_TYPE_NONE) {
703                         ret = -EFAULT;
704                         goto err;
705                 }
706 
707                 buf_desc = &buf_info->descs[reg_type];
708 
709                 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
710                         unsigned long size;
711 
712                         size = exynos_drm_gem_get_size(drm_dev, handle, file);
713                         if (!size) {
714                                 ret = -EFAULT;
715                                 goto err;
716                         }
717 
718                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
719                                                                         size)) {
720                                 ret = -EFAULT;
721                                 goto err;
722                         }
723 
724                         addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
725                                                                 file);
726                         if (IS_ERR(addr)) {
727                                 ret = -EFAULT;
728                                 goto err;
729                         }
730                 } else {
731                         struct drm_exynos_g2d_userptr g2d_userptr;
732 
733                         if (copy_from_user(&g2d_userptr, (void __user *)handle,
734                                 sizeof(struct drm_exynos_g2d_userptr))) {
735                                 ret = -EFAULT;
736                                 goto err;
737                         }
738 
739                         if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
740                                                         g2d_userptr.size)) {
741                                 ret = -EFAULT;
742                                 goto err;
743                         }
744 
745                         addr = g2d_userptr_get_dma_addr(drm_dev,
746                                                         g2d_userptr.userptr,
747                                                         g2d_userptr.size,
748                                                         file,
749                                                         &handle);
750                         if (IS_ERR(addr)) {
751                                 ret = -EFAULT;
752                                 goto err;
753                         }
754                 }
755 
756                 cmdlist->data[reg_pos + 1] = *addr;
757                 buf_info->reg_types[i] = reg_type;
758                 buf_info->handles[reg_type] = handle;
759         }
760 
761         return 0;
762 
763 err:
764         buf_info->map_nr = i;
765         return ret;
766 }
767 
768 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
769                                   struct g2d_cmdlist_node *node,
770                                   struct drm_file *filp)
771 {
772         struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
773         struct g2d_buf_info *buf_info = &node->buf_info;
774         int i;
775 
776         for (i = 0; i < buf_info->map_nr; i++) {
777                 struct g2d_buf_desc *buf_desc;
778                 enum g2d_reg_type reg_type;
779                 unsigned long handle;
780 
781                 reg_type = buf_info->reg_types[i];
782 
783                 buf_desc = &buf_info->descs[reg_type];
784                 handle = buf_info->handles[reg_type];
785 
786                 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
787                         exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
788                                                         filp);
789                 else
790                         g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
791                                                         false);
792 
793                 buf_info->reg_types[i] = REG_TYPE_NONE;
794                 buf_info->handles[reg_type] = 0;
795                 buf_info->types[reg_type] = 0;
796                 memset(buf_desc, 0x00, sizeof(*buf_desc));
797         }
798 
799         buf_info->map_nr = 0;
800 }
801 
802 static void g2d_dma_start(struct g2d_data *g2d,
803                           struct g2d_runqueue_node *runqueue_node)
804 {
805         struct g2d_cmdlist_node *node =
806                                 list_first_entry(&runqueue_node->run_cmdlist,
807                                                 struct g2d_cmdlist_node, list);
808         int ret;
809 
810         ret = pm_runtime_get_sync(g2d->dev);
811         if (ret < 0)
812                 return;
813 
814         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
815         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
816 }
817 
818 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
819 {
820         struct g2d_runqueue_node *runqueue_node;
821 
822         if (list_empty(&g2d->runqueue))
823                 return NULL;
824 
825         runqueue_node = list_first_entry(&g2d->runqueue,
826                                          struct g2d_runqueue_node, list);
827         list_del_init(&runqueue_node->list);
828         return runqueue_node;
829 }
830 
831 static void g2d_free_runqueue_node(struct g2d_data *g2d,
832                                    struct g2d_runqueue_node *runqueue_node)
833 {
834         struct g2d_cmdlist_node *node;
835 
836         if (!runqueue_node)
837                 return;
838 
839         mutex_lock(&g2d->cmdlist_mutex);
840         /*
841          * commands in run_cmdlist have been completed so unmap all gem
842          * objects in each command node so that they are unreferenced.
843          */
844         list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
845                 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
846         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
847         mutex_unlock(&g2d->cmdlist_mutex);
848 
849         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
850 }
851 
852 static void g2d_exec_runqueue(struct g2d_data *g2d)
853 {
854         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
855         if (g2d->runqueue_node)
856                 g2d_dma_start(g2d, g2d->runqueue_node);
857 }
858 
859 static void g2d_runqueue_worker(struct work_struct *work)
860 {
861         struct g2d_data *g2d = container_of(work, struct g2d_data,
862                                             runqueue_work);
863 
864         mutex_lock(&g2d->runqueue_mutex);
865         pm_runtime_put_sync(g2d->dev);
866 
867         complete(&g2d->runqueue_node->complete);
868         if (g2d->runqueue_node->async)
869                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
870 
871         if (g2d->suspended)
872                 g2d->runqueue_node = NULL;
873         else
874                 g2d_exec_runqueue(g2d);
875         mutex_unlock(&g2d->runqueue_mutex);
876 }
877 
878 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
879 {
880         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
881         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
882         struct drm_exynos_pending_g2d_event *e;
883         struct timeval now;
884 
885         if (list_empty(&runqueue_node->event_list))
886                 return;
887 
888         e = list_first_entry(&runqueue_node->event_list,
889                              struct drm_exynos_pending_g2d_event, base.link);
890 
891         do_gettimeofday(&now);
892         e->event.tv_sec = now.tv_sec;
893         e->event.tv_usec = now.tv_usec;
894         e->event.cmdlist_no = cmdlist_no;
895 
896         drm_send_event(drm_dev, &e->base);
897 }
898 
899 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
900 {
901         struct g2d_data *g2d = dev_id;
902         u32 pending;
903 
904         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
905         if (pending)
906                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
907 
908         if (pending & G2D_INTP_GCMD_FIN) {
909                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
910 
911                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
912                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
913 
914                 g2d_finish_event(g2d, cmdlist_no);
915 
916                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
917                 if (!(pending & G2D_INTP_ACMD_FIN)) {
918                         writel_relaxed(G2D_DMA_CONTINUE,
919                                         g2d->regs + G2D_DMA_COMMAND);
920                 }
921         }
922 
923         if (pending & G2D_INTP_ACMD_FIN)
924                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
925 
926         return IRQ_HANDLED;
927 }
928 
929 static int g2d_check_reg_offset(struct device *dev,
930                                 struct g2d_cmdlist_node *node,
931                                 int nr, bool for_addr)
932 {
933         struct g2d_cmdlist *cmdlist = node->cmdlist;
934         int reg_offset;
935         int index;
936         int i;
937 
938         for (i = 0; i < nr; i++) {
939                 struct g2d_buf_info *buf_info = &node->buf_info;
940                 struct g2d_buf_desc *buf_desc;
941                 enum g2d_reg_type reg_type;
942                 unsigned long value;
943 
944                 index = cmdlist->last - 2 * (i + 1);
945 
946                 reg_offset = cmdlist->data[index] & ~0xfffff000;
947                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
948                         goto err;
949                 if (reg_offset % 4)
950                         goto err;
951 
952                 switch (reg_offset) {
953                 case G2D_SRC_BASE_ADDR:
954                 case G2D_SRC_PLANE2_BASE_ADDR:
955                 case G2D_DST_BASE_ADDR:
956                 case G2D_DST_PLANE2_BASE_ADDR:
957                 case G2D_PAT_BASE_ADDR:
958                 case G2D_MSK_BASE_ADDR:
959                         if (!for_addr)
960                                 goto err;
961 
962                         reg_type = g2d_get_reg_type(reg_offset);
963 
964                         /* check userptr buffer type. */
965                         if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
966                                 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
967                                 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
968                         } else
969                                 buf_info->types[reg_type] = BUF_TYPE_GEM;
970                         break;
971                 case G2D_SRC_STRIDE_REG:
972                 case G2D_DST_STRIDE_REG:
973                         if (for_addr)
974                                 goto err;
975 
976                         reg_type = g2d_get_reg_type(reg_offset);
977 
978                         buf_desc = &buf_info->descs[reg_type];
979                         buf_desc->stride = cmdlist->data[index + 1];
980                         break;
981                 case G2D_SRC_COLOR_MODE:
982                 case G2D_DST_COLOR_MODE:
983                         if (for_addr)
984                                 goto err;
985 
986                         reg_type = g2d_get_reg_type(reg_offset);
987 
988                         buf_desc = &buf_info->descs[reg_type];
989                         value = cmdlist->data[index + 1];
990 
991                         buf_desc->format = value & 0xf;
992                         break;
993                 case G2D_SRC_LEFT_TOP:
994                 case G2D_DST_LEFT_TOP:
995                         if (for_addr)
996                                 goto err;
997 
998                         reg_type = g2d_get_reg_type(reg_offset);
999 
1000                         buf_desc = &buf_info->descs[reg_type];
1001                         value = cmdlist->data[index + 1];
1002 
1003                         buf_desc->left_x = value & 0x1fff;
1004                         buf_desc->top_y = (value & 0x1fff0000) >> 16;
1005                         break;
1006                 case G2D_SRC_RIGHT_BOTTOM:
1007                 case G2D_DST_RIGHT_BOTTOM:
1008                         if (for_addr)
1009                                 goto err;
1010 
1011                         reg_type = g2d_get_reg_type(reg_offset);
1012 
1013                         buf_desc = &buf_info->descs[reg_type];
1014                         value = cmdlist->data[index + 1];
1015 
1016                         buf_desc->right_x = value & 0x1fff;
1017                         buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1018                         break;
1019                 default:
1020                         if (for_addr)
1021                                 goto err;
1022                         break;
1023                 }
1024         }
1025 
1026         return 0;
1027 
1028 err:
1029         dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1030         return -EINVAL;
1031 }
1032 
1033 /* ioctl functions */
1034 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1035                              struct drm_file *file)
1036 {
1037         struct drm_exynos_file_private *file_priv = file->driver_priv;
1038         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1039         struct device *dev;
1040         struct g2d_data *g2d;
1041         struct drm_exynos_g2d_get_ver *ver = data;
1042 
1043         if (!g2d_priv)
1044                 return -ENODEV;
1045 
1046         dev = g2d_priv->dev;
1047         if (!dev)
1048                 return -ENODEV;
1049 
1050         g2d = dev_get_drvdata(dev);
1051         if (!g2d)
1052                 return -EFAULT;
1053 
1054         ver->major = G2D_HW_MAJOR_VER;
1055         ver->minor = G2D_HW_MINOR_VER;
1056 
1057         return 0;
1058 }
1059 
1060 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1061                                  struct drm_file *file)
1062 {
1063         struct drm_exynos_file_private *file_priv = file->driver_priv;
1064         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1065         struct device *dev;
1066         struct g2d_data *g2d;
1067         struct drm_exynos_g2d_set_cmdlist *req = data;
1068         struct drm_exynos_g2d_cmd *cmd;
1069         struct drm_exynos_pending_g2d_event *e;
1070         struct g2d_cmdlist_node *node;
1071         struct g2d_cmdlist *cmdlist;
1072         int size;
1073         int ret;
1074 
1075         if (!g2d_priv)
1076                 return -ENODEV;
1077 
1078         dev = g2d_priv->dev;
1079         if (!dev)
1080                 return -ENODEV;
1081 
1082         g2d = dev_get_drvdata(dev);
1083         if (!g2d)
1084                 return -EFAULT;
1085 
1086         node = g2d_get_cmdlist(g2d);
1087         if (!node)
1088                 return -ENOMEM;
1089 
1090         node->event = NULL;
1091 
1092         if (req->event_type != G2D_EVENT_NOT) {
1093                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1094                 if (!e) {
1095                         ret = -ENOMEM;
1096                         goto err;
1097                 }
1098 
1099                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1100                 e->event.base.length = sizeof(e->event);
1101                 e->event.user_data = req->user_data;
1102 
1103                 ret = drm_event_reserve_init(drm_dev, file, &e->base, &e->event.base);
1104                 if (ret) {
1105                         kfree(e);
1106                         goto err;
1107                 }
1108 
1109                 node->event = e;
1110         }
1111 
1112         cmdlist = node->cmdlist;
1113 
1114         cmdlist->last = 0;
1115 
1116         /*
1117          * If don't clear SFR registers, the cmdlist is affected by register
1118          * values of previous cmdlist. G2D hw executes SFR clear command and
1119          * a next command at the same time then the next command is ignored and
1120          * is executed rightly from next next command, so needs a dummy command
1121          * to next command of SFR clear command.
1122          */
1123         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1124         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1125         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1126         cmdlist->data[cmdlist->last++] = 0;
1127 
1128         /*
1129          * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1130          * and GCF bit should be set to INTEN register if user wants
1131          * G2D interrupt event once current command list execution is
1132          * finished.
1133          * Otherwise only ACF bit should be set to INTEN register so
1134          * that one interrupt is occurred after all command lists
1135          * have been completed.
1136          */
1137         if (node->event) {
1138                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1139                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1140                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1141                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1142         } else {
1143                 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1144                 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1145         }
1146 
1147         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1148         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1149         if (size > G2D_CMDLIST_DATA_NUM) {
1150                 dev_err(dev, "cmdlist size is too big\n");
1151                 ret = -EINVAL;
1152                 goto err_free_event;
1153         }
1154 
1155         cmd = (struct drm_exynos_g2d_cmd *)(unsigned long)req->cmd;
1156 
1157         if (copy_from_user(cmdlist->data + cmdlist->last,
1158                                 (void __user *)cmd,
1159                                 sizeof(*cmd) * req->cmd_nr)) {
1160                 ret = -EFAULT;
1161                 goto err_free_event;
1162         }
1163         cmdlist->last += req->cmd_nr * 2;
1164 
1165         ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1166         if (ret < 0)
1167                 goto err_free_event;
1168 
1169         node->buf_info.map_nr = req->cmd_buf_nr;
1170         if (req->cmd_buf_nr) {
1171                 struct drm_exynos_g2d_cmd *cmd_buf;
1172 
1173                 cmd_buf = (struct drm_exynos_g2d_cmd *)
1174                                 (unsigned long)req->cmd_buf;
1175 
1176                 if (copy_from_user(cmdlist->data + cmdlist->last,
1177                                         (void __user *)cmd_buf,
1178                                         sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1179                         ret = -EFAULT;
1180                         goto err_free_event;
1181                 }
1182                 cmdlist->last += req->cmd_buf_nr * 2;
1183 
1184                 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1185                 if (ret < 0)
1186                         goto err_free_event;
1187 
1188                 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1189                 if (ret < 0)
1190                         goto err_unmap;
1191         }
1192 
1193         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1194         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1195 
1196         /* head */
1197         cmdlist->head = cmdlist->last / 2;
1198 
1199         /* tail */
1200         cmdlist->data[cmdlist->last] = 0;
1201 
1202         g2d_add_cmdlist_to_inuse(g2d_priv, node);
1203 
1204         return 0;
1205 
1206 err_unmap:
1207         g2d_unmap_cmdlist_gem(g2d, node, file);
1208 err_free_event:
1209         if (node->event)
1210                 drm_event_cancel_free(drm_dev, &node->event->base);
1211 err:
1212         g2d_put_cmdlist(g2d, node);
1213         return ret;
1214 }
1215 
1216 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1217                           struct drm_file *file)
1218 {
1219         struct drm_exynos_file_private *file_priv = file->driver_priv;
1220         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1221         struct device *dev;
1222         struct g2d_data *g2d;
1223         struct drm_exynos_g2d_exec *req = data;
1224         struct g2d_runqueue_node *runqueue_node;
1225         struct list_head *run_cmdlist;
1226         struct list_head *event_list;
1227 
1228         if (!g2d_priv)
1229                 return -ENODEV;
1230 
1231         dev = g2d_priv->dev;
1232         if (!dev)
1233                 return -ENODEV;
1234 
1235         g2d = dev_get_drvdata(dev);
1236         if (!g2d)
1237                 return -EFAULT;
1238 
1239         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1240         if (!runqueue_node) {
1241                 dev_err(dev, "failed to allocate memory\n");
1242                 return -ENOMEM;
1243         }
1244         run_cmdlist = &runqueue_node->run_cmdlist;
1245         event_list = &runqueue_node->event_list;
1246         INIT_LIST_HEAD(run_cmdlist);
1247         INIT_LIST_HEAD(event_list);
1248         init_completion(&runqueue_node->complete);
1249         runqueue_node->async = req->async;
1250 
1251         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1252         list_splice_init(&g2d_priv->event_list, event_list);
1253 
1254         if (list_empty(run_cmdlist)) {
1255                 dev_err(dev, "there is no inuse cmdlist\n");
1256                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1257                 return -EPERM;
1258         }
1259 
1260         mutex_lock(&g2d->runqueue_mutex);
1261         runqueue_node->pid = current->pid;
1262         runqueue_node->filp = file;
1263         list_add_tail(&runqueue_node->list, &g2d->runqueue);
1264         if (!g2d->runqueue_node)
1265                 g2d_exec_runqueue(g2d);
1266         mutex_unlock(&g2d->runqueue_mutex);
1267 
1268         if (runqueue_node->async)
1269                 goto out;
1270 
1271         wait_for_completion(&runqueue_node->complete);
1272         g2d_free_runqueue_node(g2d, runqueue_node);
1273 
1274 out:
1275         return 0;
1276 }
1277 
1278 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1279 {
1280         struct g2d_data *g2d;
1281         int ret;
1282 
1283         g2d = dev_get_drvdata(dev);
1284         if (!g2d)
1285                 return -EFAULT;
1286 
1287         /* allocate dma-aware cmdlist buffer. */
1288         ret = g2d_init_cmdlist(g2d);
1289         if (ret < 0) {
1290                 dev_err(dev, "cmdlist init failed\n");
1291                 return ret;
1292         }
1293 
1294         ret = drm_iommu_attach_device(drm_dev, dev);
1295         if (ret < 0) {
1296                 dev_err(dev, "failed to enable iommu.\n");
1297                 g2d_fini_cmdlist(g2d);
1298         }
1299 
1300         return ret;
1301 
1302 }
1303 
1304 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1305 {
1306         drm_iommu_detach_device(drm_dev, dev);
1307 }
1308 
1309 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1310                         struct drm_file *file)
1311 {
1312         struct drm_exynos_file_private *file_priv = file->driver_priv;
1313         struct exynos_drm_g2d_private *g2d_priv;
1314 
1315         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1316         if (!g2d_priv)
1317                 return -ENOMEM;
1318 
1319         g2d_priv->dev = dev;
1320         file_priv->g2d_priv = g2d_priv;
1321 
1322         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1323         INIT_LIST_HEAD(&g2d_priv->event_list);
1324         INIT_LIST_HEAD(&g2d_priv->userptr_list);
1325 
1326         return 0;
1327 }
1328 
1329 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1330                         struct drm_file *file)
1331 {
1332         struct drm_exynos_file_private *file_priv = file->driver_priv;
1333         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1334         struct g2d_data *g2d;
1335         struct g2d_cmdlist_node *node, *n;
1336 
1337         if (!dev)
1338                 return;
1339 
1340         g2d = dev_get_drvdata(dev);
1341         if (!g2d)
1342                 return;
1343 
1344         mutex_lock(&g2d->cmdlist_mutex);
1345         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1346                 /*
1347                  * unmap all gem objects not completed.
1348                  *
1349                  * P.S. if current process was terminated forcely then
1350                  * there may be some commands in inuse_cmdlist so unmap
1351                  * them.
1352                  */
1353                 g2d_unmap_cmdlist_gem(g2d, node, file);
1354                 list_move_tail(&node->list, &g2d->free_cmdlist);
1355         }
1356         mutex_unlock(&g2d->cmdlist_mutex);
1357 
1358         /* release all g2d_userptr in pool. */
1359         g2d_userptr_free_all(drm_dev, g2d, file);
1360 
1361         kfree(file_priv->g2d_priv);
1362 }
1363 
1364 static int g2d_probe(struct platform_device *pdev)
1365 {
1366         struct device *dev = &pdev->dev;
1367         struct resource *res;
1368         struct g2d_data *g2d;
1369         struct exynos_drm_subdrv *subdrv;
1370         int ret;
1371 
1372         g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1373         if (!g2d)
1374                 return -ENOMEM;
1375 
1376         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1377                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1378         if (!g2d->runqueue_slab)
1379                 return -ENOMEM;
1380 
1381         g2d->dev = dev;
1382 
1383         g2d->g2d_workq = create_singlethread_workqueue("g2d");
1384         if (!g2d->g2d_workq) {
1385                 dev_err(dev, "failed to create workqueue\n");
1386                 ret = -EINVAL;
1387                 goto err_destroy_slab;
1388         }
1389 
1390         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1391         INIT_LIST_HEAD(&g2d->free_cmdlist);
1392         INIT_LIST_HEAD(&g2d->runqueue);
1393 
1394         mutex_init(&g2d->cmdlist_mutex);
1395         mutex_init(&g2d->runqueue_mutex);
1396 
1397         g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1398         if (IS_ERR(g2d->gate_clk)) {
1399                 dev_err(dev, "failed to get gate clock\n");
1400                 ret = PTR_ERR(g2d->gate_clk);
1401                 goto err_destroy_workqueue;
1402         }
1403 
1404         pm_runtime_enable(dev);
1405 
1406         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1407 
1408         g2d->regs = devm_ioremap_resource(dev, res);
1409         if (IS_ERR(g2d->regs)) {
1410                 ret = PTR_ERR(g2d->regs);
1411                 goto err_put_clk;
1412         }
1413 
1414         g2d->irq = platform_get_irq(pdev, 0);
1415         if (g2d->irq < 0) {
1416                 dev_err(dev, "failed to get irq\n");
1417                 ret = g2d->irq;
1418                 goto err_put_clk;
1419         }
1420 
1421         ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1422                                                                 "drm_g2d", g2d);
1423         if (ret < 0) {
1424                 dev_err(dev, "irq request failed\n");
1425                 goto err_put_clk;
1426         }
1427 
1428         g2d->max_pool = MAX_POOL;
1429 
1430         platform_set_drvdata(pdev, g2d);
1431 
1432         subdrv = &g2d->subdrv;
1433         subdrv->dev = dev;
1434         subdrv->probe = g2d_subdrv_probe;
1435         subdrv->remove = g2d_subdrv_remove;
1436         subdrv->open = g2d_open;
1437         subdrv->close = g2d_close;
1438 
1439         ret = exynos_drm_subdrv_register(subdrv);
1440         if (ret < 0) {
1441                 dev_err(dev, "failed to register drm g2d device\n");
1442                 goto err_put_clk;
1443         }
1444 
1445         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1446                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1447 
1448         return 0;
1449 
1450 err_put_clk:
1451         pm_runtime_disable(dev);
1452 err_destroy_workqueue:
1453         destroy_workqueue(g2d->g2d_workq);
1454 err_destroy_slab:
1455         kmem_cache_destroy(g2d->runqueue_slab);
1456         return ret;
1457 }
1458 
1459 static int g2d_remove(struct platform_device *pdev)
1460 {
1461         struct g2d_data *g2d = platform_get_drvdata(pdev);
1462 
1463         cancel_work_sync(&g2d->runqueue_work);
1464         exynos_drm_subdrv_unregister(&g2d->subdrv);
1465 
1466         while (g2d->runqueue_node) {
1467                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1468                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1469         }
1470 
1471         pm_runtime_disable(&pdev->dev);
1472 
1473         g2d_fini_cmdlist(g2d);
1474         destroy_workqueue(g2d->g2d_workq);
1475         kmem_cache_destroy(g2d->runqueue_slab);
1476 
1477         return 0;
1478 }
1479 
1480 #ifdef CONFIG_PM_SLEEP
1481 static int g2d_suspend(struct device *dev)
1482 {
1483         struct g2d_data *g2d = dev_get_drvdata(dev);
1484 
1485         mutex_lock(&g2d->runqueue_mutex);
1486         g2d->suspended = true;
1487         mutex_unlock(&g2d->runqueue_mutex);
1488 
1489         while (g2d->runqueue_node)
1490                 /* FIXME: good range? */
1491                 usleep_range(500, 1000);
1492 
1493         flush_work(&g2d->runqueue_work);
1494 
1495         return 0;
1496 }
1497 
1498 static int g2d_resume(struct device *dev)
1499 {
1500         struct g2d_data *g2d = dev_get_drvdata(dev);
1501 
1502         g2d->suspended = false;
1503         g2d_exec_runqueue(g2d);
1504 
1505         return 0;
1506 }
1507 #endif
1508 
1509 #ifdef CONFIG_PM
1510 static int g2d_runtime_suspend(struct device *dev)
1511 {
1512         struct g2d_data *g2d = dev_get_drvdata(dev);
1513 
1514         clk_disable_unprepare(g2d->gate_clk);
1515 
1516         return 0;
1517 }
1518 
1519 static int g2d_runtime_resume(struct device *dev)
1520 {
1521         struct g2d_data *g2d = dev_get_drvdata(dev);
1522         int ret;
1523 
1524         ret = clk_prepare_enable(g2d->gate_clk);
1525         if (ret < 0)
1526                 dev_warn(dev, "failed to enable clock.\n");
1527 
1528         return ret;
1529 }
1530 #endif
1531 
1532 static const struct dev_pm_ops g2d_pm_ops = {
1533         SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1534         SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1535 };
1536 
1537 static const struct of_device_id exynos_g2d_match[] = {
1538         { .compatible = "samsung,exynos5250-g2d" },
1539         { .compatible = "samsung,exynos4212-g2d" },
1540         {},
1541 };
1542 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1543 
1544 struct platform_driver g2d_driver = {
1545         .probe          = g2d_probe,
1546         .remove         = g2d_remove,
1547         .driver         = {
1548                 .name   = "s5p-g2d",
1549                 .owner  = THIS_MODULE,
1550                 .pm     = &g2d_pm_ops,
1551                 .of_match_table = exynos_g2d_match,
1552         },
1553 };
1554 

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