projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplu...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / 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/module.h>
12 #include <linux/clk.h>
13 #include <linux/err.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/dma-attrs.h>
22 #include <linux/of.h>
23
24 #include <drm/drmP.h>
25 #include <drm/exynos_drm.h>
26 #include "exynos_drm_drv.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 if (!g2d_userptr->out_of_list)
387 list_del_init(&g2d_userptr->list);
388
389 sg_free_table(g2d_userptr->sgt);
390 kfree(g2d_userptr->sgt);
391 g2d_userptr->sgt = NULL;
392
393 kfree(g2d_userptr->pages);
394 g2d_userptr->pages = NULL;
395 kfree(g2d_userptr);
396 g2d_userptr = NULL;
397 }
398
399 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
400 unsigned long userptr,
401 unsigned long size,
402 struct drm_file *filp,
403 unsigned long *obj)
404 {
405 struct drm_exynos_file_private *file_priv = filp->driver_priv;
406 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
407 struct g2d_cmdlist_userptr *g2d_userptr;
408 struct g2d_data *g2d;
409 struct page **pages;
410 struct sg_table *sgt;
411 struct vm_area_struct *vma;
412 unsigned long start, end;
413 unsigned int npages, offset;
414 int ret;
415
416 if (!size) {
417 DRM_ERROR("invalid userptr size.\n");
418 return ERR_PTR(-EINVAL);
419 }
420
421 g2d = dev_get_drvdata(g2d_priv->dev);
422
423 /* check if userptr already exists in userptr_list. */
424 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
425 if (g2d_userptr->userptr == userptr) {
426 /*
427 * also check size because there could be same address
428 * and different size.
429 */
430 if (g2d_userptr->size == size) {
431 atomic_inc(&g2d_userptr->refcount);
432 *obj = (unsigned long)g2d_userptr;
433
434 return &g2d_userptr->dma_addr;
435 }
436
437 /*
438 * at this moment, maybe g2d dma is accessing this
439 * g2d_userptr memory region so just remove this
440 * g2d_userptr object from userptr_list not to be
441 * referred again and also except it the userptr
442 * pool to be released after the dma access completion.
443 */
444 g2d_userptr->out_of_list = true;
445 g2d_userptr->in_pool = false;
446 list_del_init(&g2d_userptr->list);
447
448 break;
449 }
450 }
451
452 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
453 if (!g2d_userptr) {
454 DRM_ERROR("failed to allocate g2d_userptr.\n");
455 return ERR_PTR(-ENOMEM);
456 }
457
458 atomic_set(&g2d_userptr->refcount, 1);
459
460 start = userptr & PAGE_MASK;
461 offset = userptr & ~PAGE_MASK;
462 end = PAGE_ALIGN(userptr + size);
463 npages = (end - start) >> PAGE_SHIFT;
464 g2d_userptr->npages = npages;
465
466 pages = kzalloc(npages * sizeof(struct page *), GFP_KERNEL);
467 if (!pages) {
468 DRM_ERROR("failed to allocate pages.\n");
469 kfree(g2d_userptr);
470 return ERR_PTR(-ENOMEM);
471 }
472
473 vma = find_vma(current->mm, userptr);
474 if (!vma) {
475 DRM_ERROR("failed to get vm region.\n");
476 ret = -EFAULT;
477 goto err_free_pages;
478 }
479
480 if (vma->vm_end < userptr + size) {
481 DRM_ERROR("vma is too small.\n");
482 ret = -EFAULT;
483 goto err_free_pages;
484 }
485
486 g2d_userptr->vma = exynos_gem_get_vma(vma);
487 if (!g2d_userptr->vma) {
488 DRM_ERROR("failed to copy vma.\n");
489 ret = -ENOMEM;
490 goto err_free_pages;
491 }
492
493 g2d_userptr->size = size;
494
495 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
496 npages, pages, vma);
497 if (ret < 0) {
498 DRM_ERROR("failed to get user pages from userptr.\n");
499 goto err_put_vma;
500 }
501
502 g2d_userptr->pages = pages;
503
504 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
505 if (!sgt) {
506 DRM_ERROR("failed to allocate sg table.\n");
507 ret = -ENOMEM;
508 goto err_free_userptr;
509 }
510
511 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
512 size, GFP_KERNEL);
513 if (ret < 0) {
514 DRM_ERROR("failed to get sgt from pages.\n");
515 goto err_free_sgt;
516 }
517
518 g2d_userptr->sgt = sgt;
519
520 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
521 DMA_BIDIRECTIONAL);
522 if (ret < 0) {
523 DRM_ERROR("failed to map sgt with dma region.\n");
524 goto err_sg_free_table;
525 }
526
527 g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
528 g2d_userptr->userptr = userptr;
529
530 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
531
532 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
533 g2d->current_pool += npages << PAGE_SHIFT;
534 g2d_userptr->in_pool = true;
535 }
536
537 *obj = (unsigned long)g2d_userptr;
538
539 return &g2d_userptr->dma_addr;
540
541 err_sg_free_table:
542 sg_free_table(sgt);
543
544 err_free_sgt:
545 kfree(sgt);
546 sgt = NULL;
547
548 err_free_userptr:
549 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
550 g2d_userptr->npages,
551 g2d_userptr->vma);
552
553 err_put_vma:
554 exynos_gem_put_vma(g2d_userptr->vma);
555
556 err_free_pages:
557 kfree(pages);
558 kfree(g2d_userptr);
559 pages = NULL;
560 g2d_userptr = NULL;
561
562 return ERR_PTR(ret);
563 }
564
565 static void g2d_userptr_free_all(struct drm_device *drm_dev,
566 struct g2d_data *g2d,
567 struct drm_file *filp)
568 {
569 struct drm_exynos_file_private *file_priv = filp->driver_priv;
570 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
571 struct g2d_cmdlist_userptr *g2d_userptr, *n;
572
573 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
574 if (g2d_userptr->in_pool)
575 g2d_userptr_put_dma_addr(drm_dev,
576 (unsigned long)g2d_userptr,
577 true);
578
579 g2d->current_pool = 0;
580 }
581
582 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
583 {
584 enum g2d_reg_type reg_type;
585
586 switch (reg_offset) {
587 case G2D_SRC_BASE_ADDR:
588 case G2D_SRC_COLOR_MODE:
589 case G2D_SRC_LEFT_TOP:
590 case G2D_SRC_RIGHT_BOTTOM:
591 reg_type = REG_TYPE_SRC;
592 break;
593 case G2D_SRC_PLANE2_BASE_ADDR:
594 reg_type = REG_TYPE_SRC_PLANE2;
595 break;
596 case G2D_DST_BASE_ADDR:
597 case G2D_DST_COLOR_MODE:
598 case G2D_DST_LEFT_TOP:
599 case G2D_DST_RIGHT_BOTTOM:
600 reg_type = REG_TYPE_DST;
601 break;
602 case G2D_DST_PLANE2_BASE_ADDR:
603 reg_type = REG_TYPE_DST_PLANE2;
604 break;
605 case G2D_PAT_BASE_ADDR:
606 reg_type = REG_TYPE_PAT;
607 break;
608 case G2D_MSK_BASE_ADDR:
609 reg_type = REG_TYPE_MSK;
610 break;
611 default:
612 reg_type = REG_TYPE_NONE;
613 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
614 break;
615 };
616
617 return reg_type;
618 }
619
620 static unsigned long g2d_get_buf_bpp(unsigned int format)
621 {
622 unsigned long bpp;
623
624 switch (format) {
625 case G2D_FMT_XRGB8888:
626 case G2D_FMT_ARGB8888:
627 bpp = 4;
628 break;
629 case G2D_FMT_RGB565:
630 case G2D_FMT_XRGB1555:
631 case G2D_FMT_ARGB1555:
632 case G2D_FMT_XRGB4444:
633 case G2D_FMT_ARGB4444:
634 bpp = 2;
635 break;
636 case G2D_FMT_PACKED_RGB888:
637 bpp = 3;
638 break;
639 default:
640 bpp = 1;
641 break;
642 }
643
644 return bpp;
645 }
646
647 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
648 enum g2d_reg_type reg_type,
649 unsigned long size)
650 {
651 unsigned int width, height;
652 unsigned long area;
653
654 /*
655 * check source and destination buffers only.
656 * so the others are always valid.
657 */
658 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
659 return true;
660
661 width = buf_desc->right_x - buf_desc->left_x;
662 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
663 DRM_ERROR("width[%u] is out of range!\n", width);
664 return false;
665 }
666
667 height = buf_desc->bottom_y - buf_desc->top_y;
668 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
669 DRM_ERROR("height[%u] is out of range!\n", height);
670 return false;
671 }
672
673 area = (unsigned long)width * (unsigned long)height *
674 g2d_get_buf_bpp(buf_desc->format);
675 if (area > size) {
676 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
677 return false;
678 }
679
680 return true;
681 }
682
683 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
684 struct g2d_cmdlist_node *node,
685 struct drm_device *drm_dev,
686 struct drm_file *file)
687 {
688 struct g2d_cmdlist *cmdlist = node->cmdlist;
689 struct g2d_buf_info *buf_info = &node->buf_info;
690 int offset;
691 int ret;
692 int i;
693
694 for (i = 0; i < buf_info->map_nr; i++) {
695 struct g2d_buf_desc *buf_desc;
696 enum g2d_reg_type reg_type;
697 int reg_pos;
698 unsigned long handle;
699 dma_addr_t *addr;
700
701 reg_pos = cmdlist->last - 2 * (i + 1);
702
703 offset = cmdlist->data[reg_pos];
704 handle = cmdlist->data[reg_pos + 1];
705
706 reg_type = g2d_get_reg_type(offset);
707 if (reg_type == REG_TYPE_NONE) {
708 ret = -EFAULT;
709 goto err;
710 }
711
712 buf_desc = &buf_info->descs[reg_type];
713
714 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
715 unsigned long size;
716
717 size = exynos_drm_gem_get_size(drm_dev, handle, file);
718 if (!size) {
719 ret = -EFAULT;
720 goto err;
721 }
722
723 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
724 size)) {
725 ret = -EFAULT;
726 goto err;
727 }
728
729 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
730 file);
731 if (IS_ERR(addr)) {
732 ret = -EFAULT;
733 goto err;
734 }
735 } else {
736 struct drm_exynos_g2d_userptr g2d_userptr;
737
738 if (copy_from_user(&g2d_userptr, (void __user *)handle,
739 sizeof(struct drm_exynos_g2d_userptr))) {
740 ret = -EFAULT;
741 goto err;
742 }
743
744 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
745 g2d_userptr.size)) {
746 ret = -EFAULT;
747 goto err;
748 }
749
750 addr = g2d_userptr_get_dma_addr(drm_dev,
751 g2d_userptr.userptr,
752 g2d_userptr.size,
753 file,
754 &handle);
755 if (IS_ERR(addr)) {
756 ret = -EFAULT;
757 goto err;
758 }
759 }
760
761 cmdlist->data[reg_pos + 1] = *addr;
762 buf_info->reg_types[i] = reg_type;
763 buf_info->handles[reg_type] = handle;
764 }
765
766 return 0;
767
768 err:
769 buf_info->map_nr = i;
770 return ret;
771 }
772
773 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
774 struct g2d_cmdlist_node *node,
775 struct drm_file *filp)
776 {
777 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
778 struct g2d_buf_info *buf_info = &node->buf_info;
779 int i;
780
781 for (i = 0; i < buf_info->map_nr; i++) {
782 struct g2d_buf_desc *buf_desc;
783 enum g2d_reg_type reg_type;
784 unsigned long handle;
785
786 reg_type = buf_info->reg_types[i];
787
788 buf_desc = &buf_info->descs[reg_type];
789 handle = buf_info->handles[reg_type];
790
791 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
792 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
793 filp);
794 else
795 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
796 false);
797
798 buf_info->reg_types[i] = REG_TYPE_NONE;
799 buf_info->handles[reg_type] = 0;
800 buf_info->types[reg_type] = 0;
801 memset(buf_desc, 0x00, sizeof(*buf_desc));
802 }
803
804 buf_info->map_nr = 0;
805 }
806
807 static void g2d_dma_start(struct g2d_data *g2d,
808 struct g2d_runqueue_node *runqueue_node)
809 {
810 struct g2d_cmdlist_node *node =
811 list_first_entry(&runqueue_node->run_cmdlist,
812 struct g2d_cmdlist_node, list);
813
814 pm_runtime_get_sync(g2d->dev);
815 clk_enable(g2d->gate_clk);
816
817 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
818 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
819 }
820
821 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
822 {
823 struct g2d_runqueue_node *runqueue_node;
824
825 if (list_empty(&g2d->runqueue))
826 return NULL;
827
828 runqueue_node = list_first_entry(&g2d->runqueue,
829 struct g2d_runqueue_node, list);
830 list_del_init(&runqueue_node->list);
831 return runqueue_node;
832 }
833
834 static void g2d_free_runqueue_node(struct g2d_data *g2d,
835 struct g2d_runqueue_node *runqueue_node)
836 {
837 struct g2d_cmdlist_node *node;
838
839 if (!runqueue_node)
840 return;
841
842 mutex_lock(&g2d->cmdlist_mutex);
843 /*
844 * commands in run_cmdlist have been completed so unmap all gem
845 * objects in each command node so that they are unreferenced.
846 */
847 list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
848 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
849 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
850 mutex_unlock(&g2d->cmdlist_mutex);
851
852 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
853 }
854
855 static void g2d_exec_runqueue(struct g2d_data *g2d)
856 {
857 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
858 if (g2d->runqueue_node)
859 g2d_dma_start(g2d, g2d->runqueue_node);
860 }
861
862 static void g2d_runqueue_worker(struct work_struct *work)
863 {
864 struct g2d_data *g2d = container_of(work, struct g2d_data,
865 runqueue_work);
866
867 mutex_lock(&g2d->runqueue_mutex);
868 clk_disable(g2d->gate_clk);
869 pm_runtime_put_sync(g2d->dev);
870
871 complete(&g2d->runqueue_node->complete);
872 if (g2d->runqueue_node->async)
873 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
874
875 if (g2d->suspended)
876 g2d->runqueue_node = NULL;
877 else
878 g2d_exec_runqueue(g2d);
879 mutex_unlock(&g2d->runqueue_mutex);
880 }
881
882 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
883 {
884 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
885 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
886 struct drm_exynos_pending_g2d_event *e;
887 struct timeval now;
888 unsigned long flags;
889
890 if (list_empty(&runqueue_node->event_list))
891 return;
892
893 e = list_first_entry(&runqueue_node->event_list,
894 struct drm_exynos_pending_g2d_event, base.link);
895
896 do_gettimeofday(&now);
897 e->event.tv_sec = now.tv_sec;
898 e->event.tv_usec = now.tv_usec;
899 e->event.cmdlist_no = cmdlist_no;
900
901 spin_lock_irqsave(&drm_dev->event_lock, flags);
902 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
903 wake_up_interruptible(&e->base.file_priv->event_wait);
904 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
905 }
906
907 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
908 {
909 struct g2d_data *g2d = dev_id;
910 u32 pending;
911
912 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
913 if (pending)
914 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
915
916 if (pending & G2D_INTP_GCMD_FIN) {
917 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
918
919 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
920 G2D_DMA_LIST_DONE_COUNT_OFFSET;
921
922 g2d_finish_event(g2d, cmdlist_no);
923
924 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
925 if (!(pending & G2D_INTP_ACMD_FIN)) {
926 writel_relaxed(G2D_DMA_CONTINUE,
927 g2d->regs + G2D_DMA_COMMAND);
928 }
929 }
930
931 if (pending & G2D_INTP_ACMD_FIN)
932 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
933
934 return IRQ_HANDLED;
935 }
936
937 static int g2d_check_reg_offset(struct device *dev,
938 struct g2d_cmdlist_node *node,
939 int nr, bool for_addr)
940 {
941 struct g2d_cmdlist *cmdlist = node->cmdlist;
942 int reg_offset;
943 int index;
944 int i;
945
946 for (i = 0; i < nr; i++) {
947 struct g2d_buf_info *buf_info = &node->buf_info;
948 struct g2d_buf_desc *buf_desc;
949 enum g2d_reg_type reg_type;
950 unsigned long value;
951
952 index = cmdlist->last - 2 * (i + 1);
953
954 reg_offset = cmdlist->data[index] & ~0xfffff000;
955 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
956 goto err;
957 if (reg_offset % 4)
958 goto err;
959
960 switch (reg_offset) {
961 case G2D_SRC_BASE_ADDR:
962 case G2D_SRC_PLANE2_BASE_ADDR:
963 case G2D_DST_BASE_ADDR:
964 case G2D_DST_PLANE2_BASE_ADDR:
965 case G2D_PAT_BASE_ADDR:
966 case G2D_MSK_BASE_ADDR:
967 if (!for_addr)
968 goto err;
969
970 reg_type = g2d_get_reg_type(reg_offset);
971 if (reg_type == REG_TYPE_NONE)
972 goto err;
973
974 /* check userptr buffer type. */
975 if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
976 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
977 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
978 } else
979 buf_info->types[reg_type] = BUF_TYPE_GEM;
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 if (reg_type == REG_TYPE_NONE)
988 goto err;
989
990 buf_desc = &buf_info->descs[reg_type];
991 value = cmdlist->data[index + 1];
992
993 buf_desc->format = value & 0xf;
994 break;
995 case G2D_SRC_LEFT_TOP:
996 case G2D_DST_LEFT_TOP:
997 if (for_addr)
998 goto err;
999
1000 reg_type = g2d_get_reg_type(reg_offset);
1001 if (reg_type == REG_TYPE_NONE)
1002 goto err;
1003
1004 buf_desc = &buf_info->descs[reg_type];
1005 value = cmdlist->data[index + 1];
1006
1007 buf_desc->left_x = value & 0x1fff;
1008 buf_desc->top_y = (value & 0x1fff0000) >> 16;
1009 break;
1010 case G2D_SRC_RIGHT_BOTTOM:
1011 case G2D_DST_RIGHT_BOTTOM:
1012 if (for_addr)
1013 goto err;
1014
1015 reg_type = g2d_get_reg_type(reg_offset);
1016 if (reg_type == REG_TYPE_NONE)
1017 goto err;
1018
1019 buf_desc = &buf_info->descs[reg_type];
1020 value = cmdlist->data[index + 1];
1021
1022 buf_desc->right_x = value & 0x1fff;
1023 buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1024 break;
1025 default:
1026 if (for_addr)
1027 goto err;
1028 break;
1029 }
1030 }
1031
1032 return 0;
1033
1034 err:
1035 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1036 return -EINVAL;
1037 }
1038
1039 /* ioctl functions */
1040 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1041 struct drm_file *file)
1042 {
1043 struct drm_exynos_g2d_get_ver *ver = data;
1044
1045 ver->major = G2D_HW_MAJOR_VER;
1046 ver->minor = G2D_HW_MINOR_VER;
1047
1048 return 0;
1049 }
1050 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1051
1052 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1053 struct drm_file *file)
1054 {
1055 struct drm_exynos_file_private *file_priv = file->driver_priv;
1056 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1057 struct device *dev = g2d_priv->dev;
1058 struct g2d_data *g2d;
1059 struct drm_exynos_g2d_set_cmdlist *req = data;
1060 struct drm_exynos_g2d_cmd *cmd;
1061 struct drm_exynos_pending_g2d_event *e;
1062 struct g2d_cmdlist_node *node;
1063 struct g2d_cmdlist *cmdlist;
1064 unsigned long flags;
1065 int size;
1066 int ret;
1067
1068 if (!dev)
1069 return -ENODEV;
1070
1071 g2d = dev_get_drvdata(dev);
1072 if (!g2d)
1073 return -EFAULT;
1074
1075 node = g2d_get_cmdlist(g2d);
1076 if (!node)
1077 return -ENOMEM;
1078
1079 node->event = NULL;
1080
1081 if (req->event_type != G2D_EVENT_NOT) {
1082 spin_lock_irqsave(&drm_dev->event_lock, flags);
1083 if (file->event_space < sizeof(e->event)) {
1084 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1085 ret = -ENOMEM;
1086 goto err;
1087 }
1088 file->event_space -= sizeof(e->event);
1089 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1090
1091 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1092 if (!e) {
1093 dev_err(dev, "failed to allocate event\n");
1094
1095 spin_lock_irqsave(&drm_dev->event_lock, flags);
1096 file->event_space += sizeof(e->event);
1097 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1098
1099 ret = -ENOMEM;
1100 goto err;
1101 }
1102
1103 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1104 e->event.base.length = sizeof(e->event);
1105 e->event.user_data = req->user_data;
1106 e->base.event = &e->event.base;
1107 e->base.file_priv = file;
1108 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1109
1110 node->event = e;
1111 }
1112
1113 cmdlist = node->cmdlist;
1114
1115 cmdlist->last = 0;
1116
1117 /*
1118 * If don't clear SFR registers, the cmdlist is affected by register
1119 * values of previous cmdlist. G2D hw executes SFR clear command and
1120 * a next command at the same time then the next command is ignored and
1121 * is executed rightly from next next command, so needs a dummy command
1122 * to next command of SFR clear command.
1123 */
1124 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1125 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1126 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1127 cmdlist->data[cmdlist->last++] = 0;
1128
1129 /*
1130 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1131 * and GCF bit should be set to INTEN register if user wants
1132 * G2D interrupt event once current command list execution is
1133 * finished.
1134 * Otherwise only ACF bit should be set to INTEN register so
1135 * that one interrupt is occured after all command lists
1136 * have been completed.
1137 */
1138 if (node->event) {
1139 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1140 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1141 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1142 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1143 } else {
1144 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1145 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1146 }
1147
1148 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1149 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1150 if (size > G2D_CMDLIST_DATA_NUM) {
1151 dev_err(dev, "cmdlist size is too big\n");
1152 ret = -EINVAL;
1153 goto err_free_event;
1154 }
1155
1156 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1157
1158 if (copy_from_user(cmdlist->data + cmdlist->last,
1159 (void __user *)cmd,
1160 sizeof(*cmd) * req->cmd_nr)) {
1161 ret = -EFAULT;
1162 goto err_free_event;
1163 }
1164 cmdlist->last += req->cmd_nr * 2;
1165
1166 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1167 if (ret < 0)
1168 goto err_free_event;
1169
1170 node->buf_info.map_nr = req->cmd_buf_nr;
1171 if (req->cmd_buf_nr) {
1172 struct drm_exynos_g2d_cmd *cmd_buf;
1173
1174 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)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 spin_lock_irqsave(&drm_dev->event_lock, flags);
1211 file->event_space += sizeof(e->event);
1212 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1213 kfree(node->event);
1214 }
1215 err:
1216 g2d_put_cmdlist(g2d, node);
1217 return ret;
1218 }
1219 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1220
1221 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1222 struct drm_file *file)
1223 {
1224 struct drm_exynos_file_private *file_priv = file->driver_priv;
1225 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1226 struct device *dev = g2d_priv->dev;
1227 struct g2d_data *g2d;
1228 struct drm_exynos_g2d_exec *req = data;
1229 struct g2d_runqueue_node *runqueue_node;
1230 struct list_head *run_cmdlist;
1231 struct list_head *event_list;
1232
1233 if (!dev)
1234 return -ENODEV;
1235
1236 g2d = dev_get_drvdata(dev);
1237 if (!g2d)
1238 return -EFAULT;
1239
1240 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1241 if (!runqueue_node) {
1242 dev_err(dev, "failed to allocate memory\n");
1243 return -ENOMEM;
1244 }
1245 run_cmdlist = &runqueue_node->run_cmdlist;
1246 event_list = &runqueue_node->event_list;
1247 INIT_LIST_HEAD(run_cmdlist);
1248 INIT_LIST_HEAD(event_list);
1249 init_completion(&runqueue_node->complete);
1250 runqueue_node->async = req->async;
1251
1252 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1253 list_splice_init(&g2d_priv->event_list, event_list);
1254
1255 if (list_empty(run_cmdlist)) {
1256 dev_err(dev, "there is no inuse cmdlist\n");
1257 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1258 return -EPERM;
1259 }
1260
1261 mutex_lock(&g2d->runqueue_mutex);
1262 runqueue_node->pid = current->pid;
1263 runqueue_node->filp = file;
1264 list_add_tail(&runqueue_node->list, &g2d->runqueue);
1265 if (!g2d->runqueue_node)
1266 g2d_exec_runqueue(g2d);
1267 mutex_unlock(&g2d->runqueue_mutex);
1268
1269 if (runqueue_node->async)
1270 goto out;
1271
1272 wait_for_completion(&runqueue_node->complete);
1273 g2d_free_runqueue_node(g2d, runqueue_node);
1274
1275 out:
1276 return 0;
1277 }
1278 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1279
1280 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1281 {
1282 struct g2d_data *g2d;
1283 int ret;
1284
1285 g2d = dev_get_drvdata(dev);
1286 if (!g2d)
1287 return -EFAULT;
1288
1289 /* allocate dma-aware cmdlist buffer. */
1290 ret = g2d_init_cmdlist(g2d);
1291 if (ret < 0) {
1292 dev_err(dev, "cmdlist init failed\n");
1293 return ret;
1294 }
1295
1296 if (!is_drm_iommu_supported(drm_dev))
1297 return 0;
1298
1299 ret = drm_iommu_attach_device(drm_dev, dev);
1300 if (ret < 0) {
1301 dev_err(dev, "failed to enable iommu.\n");
1302 g2d_fini_cmdlist(g2d);
1303 }
1304
1305 return ret;
1306
1307 }
1308
1309 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1310 {
1311 if (!is_drm_iommu_supported(drm_dev))
1312 return;
1313
1314 drm_iommu_detach_device(drm_dev, dev);
1315 }
1316
1317 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1318 struct drm_file *file)
1319 {
1320 struct drm_exynos_file_private *file_priv = file->driver_priv;
1321 struct exynos_drm_g2d_private *g2d_priv;
1322
1323 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1324 if (!g2d_priv) {
1325 dev_err(dev, "failed to allocate g2d private data\n");
1326 return -ENOMEM;
1327 }
1328
1329 g2d_priv->dev = dev;
1330 file_priv->g2d_priv = g2d_priv;
1331
1332 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1333 INIT_LIST_HEAD(&g2d_priv->event_list);
1334 INIT_LIST_HEAD(&g2d_priv->userptr_list);
1335
1336 return 0;
1337 }
1338
1339 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1340 struct drm_file *file)
1341 {
1342 struct drm_exynos_file_private *file_priv = file->driver_priv;
1343 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1344 struct g2d_data *g2d;
1345 struct g2d_cmdlist_node *node, *n;
1346
1347 if (!dev)
1348 return;
1349
1350 g2d = dev_get_drvdata(dev);
1351 if (!g2d)
1352 return;
1353
1354 mutex_lock(&g2d->cmdlist_mutex);
1355 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1356 /*
1357 * unmap all gem objects not completed.
1358 *
1359 * P.S. if current process was terminated forcely then
1360 * there may be some commands in inuse_cmdlist so unmap
1361 * them.
1362 */
1363 g2d_unmap_cmdlist_gem(g2d, node, file);
1364 list_move_tail(&node->list, &g2d->free_cmdlist);
1365 }
1366 mutex_unlock(&g2d->cmdlist_mutex);
1367
1368 /* release all g2d_userptr in pool. */
1369 g2d_userptr_free_all(drm_dev, g2d, file);
1370
1371 kfree(file_priv->g2d_priv);
1372 }
1373
1374 static int g2d_probe(struct platform_device *pdev)
1375 {
1376 struct device *dev = &pdev->dev;
1377 struct resource *res;
1378 struct g2d_data *g2d;
1379 struct exynos_drm_subdrv *subdrv;
1380 int ret;
1381
1382 g2d = devm_kzalloc(&pdev->dev, sizeof(*g2d), GFP_KERNEL);
1383 if (!g2d) {
1384 dev_err(dev, "failed to allocate driver data\n");
1385 return -ENOMEM;
1386 }
1387
1388 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1389 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1390 if (!g2d->runqueue_slab)
1391 return -ENOMEM;
1392
1393 g2d->dev = dev;
1394
1395 g2d->g2d_workq = create_singlethread_workqueue("g2d");
1396 if (!g2d->g2d_workq) {
1397 dev_err(dev, "failed to create workqueue\n");
1398 ret = -EINVAL;
1399 goto err_destroy_slab;
1400 }
1401
1402 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1403 INIT_LIST_HEAD(&g2d->free_cmdlist);
1404 INIT_LIST_HEAD(&g2d->runqueue);
1405
1406 mutex_init(&g2d->cmdlist_mutex);
1407 mutex_init(&g2d->runqueue_mutex);
1408
1409 g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1410 if (IS_ERR(g2d->gate_clk)) {
1411 dev_err(dev, "failed to get gate clock\n");
1412 ret = PTR_ERR(g2d->gate_clk);
1413 goto err_destroy_workqueue;
1414 }
1415
1416 pm_runtime_enable(dev);
1417
1418 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1419
1420 g2d->regs = devm_ioremap_resource(&pdev->dev, res);
1421 if (IS_ERR(g2d->regs)) {
1422 ret = PTR_ERR(g2d->regs);
1423 goto err_put_clk;
1424 }
1425
1426 g2d->irq = platform_get_irq(pdev, 0);
1427 if (g2d->irq < 0) {
1428 dev_err(dev, "failed to get irq\n");
1429 ret = g2d->irq;
1430 goto err_put_clk;
1431 }
1432
1433 ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0,
1434 "drm_g2d", g2d);
1435 if (ret < 0) {
1436 dev_err(dev, "irq request failed\n");
1437 goto err_put_clk;
1438 }
1439
1440 g2d->max_pool = MAX_POOL;
1441
1442 platform_set_drvdata(pdev, g2d);
1443
1444 subdrv = &g2d->subdrv;
1445 subdrv->dev = dev;
1446 subdrv->probe = g2d_subdrv_probe;
1447 subdrv->remove = g2d_subdrv_remove;
1448 subdrv->open = g2d_open;
1449 subdrv->close = g2d_close;
1450
1451 ret = exynos_drm_subdrv_register(subdrv);
1452 if (ret < 0) {
1453 dev_err(dev, "failed to register drm g2d device\n");
1454 goto err_put_clk;
1455 }
1456
1457 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1458 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1459
1460 return 0;
1461
1462 err_put_clk:
1463 pm_runtime_disable(dev);
1464 err_destroy_workqueue:
1465 destroy_workqueue(g2d->g2d_workq);
1466 err_destroy_slab:
1467 kmem_cache_destroy(g2d->runqueue_slab);
1468 return ret;
1469 }
1470
1471 static int g2d_remove(struct platform_device *pdev)
1472 {
1473 struct g2d_data *g2d = platform_get_drvdata(pdev);
1474
1475 cancel_work_sync(&g2d->runqueue_work);
1476 exynos_drm_subdrv_unregister(&g2d->subdrv);
1477
1478 while (g2d->runqueue_node) {
1479 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1480 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1481 }
1482
1483 pm_runtime_disable(&pdev->dev);
1484
1485 g2d_fini_cmdlist(g2d);
1486 destroy_workqueue(g2d->g2d_workq);
1487 kmem_cache_destroy(g2d->runqueue_slab);
1488
1489 return 0;
1490 }
1491
1492 #ifdef CONFIG_PM_SLEEP
1493 static int g2d_suspend(struct device *dev)
1494 {
1495 struct g2d_data *g2d = dev_get_drvdata(dev);
1496
1497 mutex_lock(&g2d->runqueue_mutex);
1498 g2d->suspended = true;
1499 mutex_unlock(&g2d->runqueue_mutex);
1500
1501 while (g2d->runqueue_node)
1502 /* FIXME: good range? */
1503 usleep_range(500, 1000);
1504
1505 flush_work(&g2d->runqueue_work);
1506
1507 return 0;
1508 }
1509
1510 static int g2d_resume(struct device *dev)
1511 {
1512 struct g2d_data *g2d = dev_get_drvdata(dev);
1513
1514 g2d->suspended = false;
1515 g2d_exec_runqueue(g2d);
1516
1517 return 0;
1518 }
1519 #endif
1520
1521 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
1522
1523 #ifdef CONFIG_OF
1524 static const struct of_device_id exynos_g2d_match[] = {
1525 { .compatible = "samsung,exynos5250-g2d" },
1526 {},
1527 };
1528 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1529 #endif
1530
1531 struct platform_driver g2d_driver = {
1532 .probe = g2d_probe,
1533 .remove = g2d_remove,
1534 .driver = {
1535 .name = "s5p-g2d",
1536 .owner = THIS_MODULE,
1537 .pm = &g2d_pm_ops,
1538 .of_match_table = of_match_ptr(exynos_g2d_match),
1539 },
1540 };
kernel source for telekom puls (alcatel/mediatek)