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1/*
2 * Copyright (C) 2012 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundationr
8 */
9
10#include <linux/kernel.h>
11#include <linux/clk.h>
12#include <linux/err.h>
13#include <linux/interrupt.h>
14#include <linux/io.h>
15#include <linux/platform_device.h>
16#include <linux/pm_runtime.h>
17#include <linux/slab.h>
18#include <linux/workqueue.h>
19#include <linux/dma-mapping.h>
20#include <linux/dma-attrs.h>
21#include <linux/of.h>
22
23#include <drm/drmP.h>
24#include <drm/exynos_drm.h>
25#include "exynos_drm_drv.h"
26#include "exynos_drm_g2d.h"
27#include "exynos_drm_gem.h"
28#include "exynos_drm_iommu.h"
29
30#define G2D_HW_MAJOR_VER 4
31#define G2D_HW_MINOR_VER 1
32
33/* vaild register range set from user: 0x0104 ~ 0x0880 */
34#define G2D_VALID_START 0x0104
35#define G2D_VALID_END 0x0880
36
37/* general registers */
38#define G2D_SOFT_RESET 0x0000
39#define G2D_INTEN 0x0004
40#define G2D_INTC_PEND 0x000C
41#define G2D_DMA_SFR_BASE_ADDR 0x0080
42#define G2D_DMA_COMMAND 0x0084
43#define G2D_DMA_STATUS 0x008C
44#define G2D_DMA_HOLD_CMD 0x0090
45
46/* command registers */
47#define G2D_BITBLT_START 0x0100
48
49/* registers for base address */
50#define G2D_SRC_BASE_ADDR 0x0304
51#define G2D_SRC_COLOR_MODE 0x030C
52#define G2D_SRC_LEFT_TOP 0x0310
53#define G2D_SRC_RIGHT_BOTTOM 0x0314
54#define G2D_SRC_PLANE2_BASE_ADDR 0x0318
55#define G2D_DST_BASE_ADDR 0x0404
56#define G2D_DST_COLOR_MODE 0x040C
57#define G2D_DST_LEFT_TOP 0x0410
58#define G2D_DST_RIGHT_BOTTOM 0x0414
59#define G2D_DST_PLANE2_BASE_ADDR 0x0418
60#define G2D_PAT_BASE_ADDR 0x0500
61#define G2D_MSK_BASE_ADDR 0x0520
62
63/* G2D_SOFT_RESET */
64#define G2D_SFRCLEAR (1 << 1)
65#define G2D_R (1 << 0)
66
67/* G2D_INTEN */
68#define G2D_INTEN_ACF (1 << 3)
69#define G2D_INTEN_UCF (1 << 2)
70#define G2D_INTEN_GCF (1 << 1)
71#define G2D_INTEN_SCF (1 << 0)
72
73/* G2D_INTC_PEND */
74#define G2D_INTP_ACMD_FIN (1 << 3)
75#define G2D_INTP_UCMD_FIN (1 << 2)
76#define G2D_INTP_GCMD_FIN (1 << 1)
77#define G2D_INTP_SCMD_FIN (1 << 0)
78
79/* G2D_DMA_COMMAND */
80#define G2D_DMA_HALT (1 << 2)
81#define G2D_DMA_CONTINUE (1 << 1)
82#define G2D_DMA_START (1 << 0)
83
84/* G2D_DMA_STATUS */
85#define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
86#define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
87#define G2D_DMA_DONE (1 << 0)
88#define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
89
90/* G2D_DMA_HOLD_CMD */
91#define G2D_USER_HOLD (1 << 2)
92#define G2D_LIST_HOLD (1 << 1)
93#define G2D_BITBLT_HOLD (1 << 0)
94
95/* G2D_BITBLT_START */
96#define G2D_START_CASESEL (1 << 2)
97#define G2D_START_NHOLT (1 << 1)
98#define G2D_START_BITBLT (1 << 0)
99
100/* buffer color format */
101#define G2D_FMT_XRGB8888 0
102#define G2D_FMT_ARGB8888 1
103#define G2D_FMT_RGB565 2
104#define G2D_FMT_XRGB1555 3
105#define G2D_FMT_ARGB1555 4
106#define G2D_FMT_XRGB4444 5
107#define G2D_FMT_ARGB4444 6
108#define G2D_FMT_PACKED_RGB888 7
109#define G2D_FMT_A8 11
110#define G2D_FMT_L8 12
111
112/* buffer valid length */
113#define G2D_LEN_MIN 1
114#define G2D_LEN_MAX 8000
115
116#define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
117#define G2D_CMDLIST_NUM 64
118#define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
119#define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
120
121/* maximum buffer pool size of userptr is 64MB as default */
122#define MAX_POOL (64 * 1024 * 1024)
123
124enum {
125 BUF_TYPE_GEM = 1,
126 BUF_TYPE_USERPTR,
127};
128
129enum 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 */
141struct 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 */
157struct 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 */
175struct 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
183struct drm_exynos_pending_g2d_event {
184 struct drm_pending_event base;
185 struct drm_exynos_g2d_event event;
186};
187
188struct 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};
201struct 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
210struct 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
220struct 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
248static 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
293err:
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
300static 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
310static 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
330static 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
337static 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
350add_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
357static 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
378out:
379 exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
380 DMA_BIDIRECTIONAL);
381
382 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
383 g2d_userptr->npages,
384 g2d_userptr->vma);
385
386 exynos_gem_put_vma(g2d_userptr->vma);
387
388 if (!g2d_userptr->out_of_list)
389 list_del_init(&g2d_userptr->list);
390
391 sg_free_table(g2d_userptr->sgt);
392 kfree(g2d_userptr->sgt);
393
394 drm_free_large(g2d_userptr->pages);
395 kfree(g2d_userptr);
396}
397
398static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
399 unsigned long userptr,
400 unsigned long size,
401 struct drm_file *filp,
402 unsigned long *obj)
403{
404 struct drm_exynos_file_private *file_priv = filp->driver_priv;
405 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
406 struct g2d_cmdlist_userptr *g2d_userptr;
407 struct g2d_data *g2d;
408 struct page **pages;
409 struct sg_table *sgt;
410 struct vm_area_struct *vma;
411 unsigned long start, end;
412 unsigned int npages, offset;
413 int ret;
414
415 if (!size) {
416 DRM_ERROR("invalid userptr size.\n");
417 return ERR_PTR(-EINVAL);
418 }
419
420 g2d = dev_get_drvdata(g2d_priv->dev);
421
422 /* check if userptr already exists in userptr_list. */
423 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
424 if (g2d_userptr->userptr == userptr) {
425 /*
426 * also check size because there could be same address
427 * and different size.
428 */
429 if (g2d_userptr->size == size) {
430 atomic_inc(&g2d_userptr->refcount);
431 *obj = (unsigned long)g2d_userptr;
432
433 return &g2d_userptr->dma_addr;
434 }
435
436 /*
437 * at this moment, maybe g2d dma is accessing this
438 * g2d_userptr memory region so just remove this
439 * g2d_userptr object from userptr_list not to be
440 * referred again and also except it the userptr
441 * pool to be released after the dma access completion.
442 */
443 g2d_userptr->out_of_list = true;
444 g2d_userptr->in_pool = false;
445 list_del_init(&g2d_userptr->list);
446
447 break;
448 }
449 }
450
451 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
452 if (!g2d_userptr)
453 return ERR_PTR(-ENOMEM);
454
455 atomic_set(&g2d_userptr->refcount, 1);
456
457 start = userptr & PAGE_MASK;
458 offset = userptr & ~PAGE_MASK;
459 end = PAGE_ALIGN(userptr + size);
460 npages = (end - start) >> PAGE_SHIFT;
461 g2d_userptr->npages = npages;
462
463 pages = drm_calloc_large(npages, sizeof(struct page *));
464 if (!pages) {
465 DRM_ERROR("failed to allocate pages.\n");
466 ret = -ENOMEM;
467 goto err_free;
468 }
469
470 vma = find_vma(current->mm, userptr);
471 if (!vma) {
472 DRM_ERROR("failed to get vm region.\n");
473 ret = -EFAULT;
474 goto err_free_pages;
475 }
476
477 if (vma->vm_end < userptr + size) {
478 DRM_ERROR("vma is too small.\n");
479 ret = -EFAULT;
480 goto err_free_pages;
481 }
482
483 g2d_userptr->vma = exynos_gem_get_vma(vma);
484 if (!g2d_userptr->vma) {
485 DRM_ERROR("failed to copy vma.\n");
486 ret = -ENOMEM;
487 goto err_free_pages;
488 }
489
490 g2d_userptr->size = size;
491
492 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
493 npages, pages, vma);
494 if (ret < 0) {
495 DRM_ERROR("failed to get user pages from userptr.\n");
496 goto err_put_vma;
497 }
498
499 g2d_userptr->pages = pages;
500
501 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
502 if (!sgt) {
503 ret = -ENOMEM;
504 goto err_free_userptr;
505 }
506
507 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
508 size, GFP_KERNEL);
509 if (ret < 0) {
510 DRM_ERROR("failed to get sgt from pages.\n");
511 goto err_free_sgt;
512 }
513
514 g2d_userptr->sgt = sgt;
515
516 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
517 DMA_BIDIRECTIONAL);
518 if (ret < 0) {
519 DRM_ERROR("failed to map sgt with dma region.\n");
520 goto err_sg_free_table;
521 }
522
523 g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
524 g2d_userptr->userptr = userptr;
525
526 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
527
528 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
529 g2d->current_pool += npages << PAGE_SHIFT;
530 g2d_userptr->in_pool = true;
531 }
532
533 *obj = (unsigned long)g2d_userptr;
534
535 return &g2d_userptr->dma_addr;
536
537err_sg_free_table:
538 sg_free_table(sgt);
539
540err_free_sgt:
541 kfree(sgt);
542
543err_free_userptr:
544 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
545 g2d_userptr->npages,
546 g2d_userptr->vma);
547
548err_put_vma:
549 exynos_gem_put_vma(g2d_userptr->vma);
550
551err_free_pages:
552 drm_free_large(pages);
553
554err_free:
555 kfree(g2d_userptr);
556
557 return ERR_PTR(ret);
558}
559
560static void g2d_userptr_free_all(struct drm_device *drm_dev,
561 struct g2d_data *g2d,
562 struct drm_file *filp)
563{
564 struct drm_exynos_file_private *file_priv = filp->driver_priv;
565 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
566 struct g2d_cmdlist_userptr *g2d_userptr, *n;
567
568 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
569 if (g2d_userptr->in_pool)
570 g2d_userptr_put_dma_addr(drm_dev,
571 (unsigned long)g2d_userptr,
572 true);
573
574 g2d->current_pool = 0;
575}
576
577static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
578{
579 enum g2d_reg_type reg_type;
580
581 switch (reg_offset) {
582 case G2D_SRC_BASE_ADDR:
583 case G2D_SRC_COLOR_MODE:
584 case G2D_SRC_LEFT_TOP:
585 case G2D_SRC_RIGHT_BOTTOM:
586 reg_type = REG_TYPE_SRC;
587 break;
588 case G2D_SRC_PLANE2_BASE_ADDR:
589 reg_type = REG_TYPE_SRC_PLANE2;
590 break;
591 case G2D_DST_BASE_ADDR:
592 case G2D_DST_COLOR_MODE:
593 case G2D_DST_LEFT_TOP:
594 case G2D_DST_RIGHT_BOTTOM:
595 reg_type = REG_TYPE_DST;
596 break;
597 case G2D_DST_PLANE2_BASE_ADDR:
598 reg_type = REG_TYPE_DST_PLANE2;
599 break;
600 case G2D_PAT_BASE_ADDR:
601 reg_type = REG_TYPE_PAT;
602 break;
603 case G2D_MSK_BASE_ADDR:
604 reg_type = REG_TYPE_MSK;
605 break;
606 default:
607 reg_type = REG_TYPE_NONE;
608 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
609 break;
610 }
611
612 return reg_type;
613}
614
615static unsigned long g2d_get_buf_bpp(unsigned int format)
616{
617 unsigned long bpp;
618
619 switch (format) {
620 case G2D_FMT_XRGB8888:
621 case G2D_FMT_ARGB8888:
622 bpp = 4;
623 break;
624 case G2D_FMT_RGB565:
625 case G2D_FMT_XRGB1555:
626 case G2D_FMT_ARGB1555:
627 case G2D_FMT_XRGB4444:
628 case G2D_FMT_ARGB4444:
629 bpp = 2;
630 break;
631 case G2D_FMT_PACKED_RGB888:
632 bpp = 3;
633 break;
634 default:
635 bpp = 1;
636 break;
637 }
638
639 return bpp;
640}
641
642static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
643 enum g2d_reg_type reg_type,
644 unsigned long size)
645{
646 unsigned int width, height;
647 unsigned long area;
648
649 /*
650 * check source and destination buffers only.
651 * so the others are always valid.
652 */
653 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
654 return true;
655
656 width = buf_desc->right_x - buf_desc->left_x;
657 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
658 DRM_ERROR("width[%u] is out of range!\n", width);
659 return false;
660 }
661
662 height = buf_desc->bottom_y - buf_desc->top_y;
663 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
664 DRM_ERROR("height[%u] is out of range!\n", height);
665 return false;
666 }
667
668 area = (unsigned long)width * (unsigned long)height *
669 g2d_get_buf_bpp(buf_desc->format);
670 if (area > size) {
671 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
672 return false;
673 }
674
675 return true;
676}
677
678static 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
763err:
764 buf_info->map_nr = i;
765 return ret;
766}
767
768static 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
802static 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
818static 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
831static 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
852static 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
859static 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
878static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
879{
880 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
881 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
882 struct drm_exynos_pending_g2d_event *e;
883 struct timeval now;
884 unsigned long flags;
885
886 if (list_empty(&runqueue_node->event_list))
887 return;
888
889 e = list_first_entry(&runqueue_node->event_list,
890 struct drm_exynos_pending_g2d_event, base.link);
891
892 do_gettimeofday(&now);
893 e->event.tv_sec = now.tv_sec;
894 e->event.tv_usec = now.tv_usec;
895 e->event.cmdlist_no = cmdlist_no;
896
897 spin_lock_irqsave(&drm_dev->event_lock, flags);
898 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
899 wake_up_interruptible(&e->base.file_priv->event_wait);
900 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
901}
902
903static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
904{
905 struct g2d_data *g2d = dev_id;
906 u32 pending;
907
908 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
909 if (pending)
910 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
911
912 if (pending & G2D_INTP_GCMD_FIN) {
913 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
914
915 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
916 G2D_DMA_LIST_DONE_COUNT_OFFSET;
917
918 g2d_finish_event(g2d, cmdlist_no);
919
920 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
921 if (!(pending & G2D_INTP_ACMD_FIN)) {
922 writel_relaxed(G2D_DMA_CONTINUE,
923 g2d->regs + G2D_DMA_COMMAND);
924 }
925 }
926
927 if (pending & G2D_INTP_ACMD_FIN)
928 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
929
930 return IRQ_HANDLED;
931}
932
933static int g2d_check_reg_offset(struct device *dev,
934 struct g2d_cmdlist_node *node,
935 int nr, bool for_addr)
936{
937 struct g2d_cmdlist *cmdlist = node->cmdlist;
938 int reg_offset;
939 int index;
940 int i;
941
942 for (i = 0; i < nr; i++) {
943 struct g2d_buf_info *buf_info = &node->buf_info;
944 struct g2d_buf_desc *buf_desc;
945 enum g2d_reg_type reg_type;
946 unsigned long value;
947
948 index = cmdlist->last - 2 * (i + 1);
949
950 reg_offset = cmdlist->data[index] & ~0xfffff000;
951 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
952 goto err;
953 if (reg_offset % 4)
954 goto err;
955
956 switch (reg_offset) {
957 case G2D_SRC_BASE_ADDR:
958 case G2D_SRC_PLANE2_BASE_ADDR:
959 case G2D_DST_BASE_ADDR:
960 case G2D_DST_PLANE2_BASE_ADDR:
961 case G2D_PAT_BASE_ADDR:
962 case G2D_MSK_BASE_ADDR:
963 if (!for_addr)
964 goto err;
965
966 reg_type = g2d_get_reg_type(reg_offset);
967 if (reg_type == REG_TYPE_NONE)
968 goto err;
969
970 /* check userptr buffer type. */
971 if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
972 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
973 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
974 } else
975 buf_info->types[reg_type] = BUF_TYPE_GEM;
976 break;
977 case G2D_SRC_COLOR_MODE:
978 case G2D_DST_COLOR_MODE:
979 if (for_addr)
980 goto err;
981
982 reg_type = g2d_get_reg_type(reg_offset);
983 if (reg_type == REG_TYPE_NONE)
984 goto err;
985
986 buf_desc = &buf_info->descs[reg_type];
987 value = cmdlist->data[index + 1];
988
989 buf_desc->format = value & 0xf;
990 break;
991 case G2D_SRC_LEFT_TOP:
992 case G2D_DST_LEFT_TOP:
993 if (for_addr)
994 goto err;
995
996 reg_type = g2d_get_reg_type(reg_offset);
997 if (reg_type == REG_TYPE_NONE)
998 goto err;
999
1000 buf_desc = &buf_info->descs[reg_type];
1001 value = cmdlist->data[index + 1];
1002
1003 buf_desc->left_x = value & 0x1fff;
1004 buf_desc->top_y = (value & 0x1fff0000) >> 16;
1005 break;
1006 case G2D_SRC_RIGHT_BOTTOM:
1007 case G2D_DST_RIGHT_BOTTOM:
1008 if (for_addr)
1009 goto err;
1010
1011 reg_type = g2d_get_reg_type(reg_offset);
1012 if (reg_type == REG_TYPE_NONE)
1013 goto err;
1014
1015 buf_desc = &buf_info->descs[reg_type];
1016 value = cmdlist->data[index + 1];
1017
1018 buf_desc->right_x = value & 0x1fff;
1019 buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1020 break;
1021 default:
1022 if (for_addr)
1023 goto err;
1024 break;
1025 }
1026 }
1027
1028 return 0;
1029
1030err:
1031 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1032 return -EINVAL;
1033}
1034
1035/* ioctl functions */
1036int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1037 struct drm_file *file)
1038{
1039 struct drm_exynos_g2d_get_ver *ver = data;
1040
1041 ver->major = G2D_HW_MAJOR_VER;
1042 ver->minor = G2D_HW_MINOR_VER;
1043
1044 return 0;
1045}
1046EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1047
1048int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1049 struct drm_file *file)
1050{
1051 struct drm_exynos_file_private *file_priv = file->driver_priv;
1052 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1053 struct device *dev = g2d_priv->dev;
1054 struct g2d_data *g2d;
1055 struct drm_exynos_g2d_set_cmdlist *req = data;
1056 struct drm_exynos_g2d_cmd *cmd;
1057 struct drm_exynos_pending_g2d_event *e;
1058 struct g2d_cmdlist_node *node;
1059 struct g2d_cmdlist *cmdlist;
1060 unsigned long flags;
1061 int size;
1062 int ret;
1063
1064 if (!dev)
1065 return -ENODEV;
1066
1067 g2d = dev_get_drvdata(dev);
1068 if (!g2d)
1069 return -EFAULT;
1070
1071 node = g2d_get_cmdlist(g2d);
1072 if (!node)
1073 return -ENOMEM;
1074
1075 node->event = NULL;
1076
1077 if (req->event_type != G2D_EVENT_NOT) {
1078 spin_lock_irqsave(&drm_dev->event_lock, flags);
1079 if (file->event_space < sizeof(e->event)) {
1080 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1081 ret = -ENOMEM;
1082 goto err;
1083 }
1084 file->event_space -= sizeof(e->event);
1085 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1086
1087 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1088 if (!e) {
1089 spin_lock_irqsave(&drm_dev->event_lock, flags);
1090 file->event_space += sizeof(e->event);
1091 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1092
1093 ret = -ENOMEM;
1094 goto err;
1095 }
1096
1097 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1098 e->event.base.length = sizeof(e->event);
1099 e->event.user_data = req->user_data;
1100 e->base.event = &e->event.base;
1101 e->base.file_priv = file;
1102 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1103
1104 node->event = e;
1105 }
1106
1107 cmdlist = node->cmdlist;
1108
1109 cmdlist->last = 0;
1110
1111 /*
1112 * If don't clear SFR registers, the cmdlist is affected by register
1113 * values of previous cmdlist. G2D hw executes SFR clear command and
1114 * a next command at the same time then the next command is ignored and
1115 * is executed rightly from next next command, so needs a dummy command
1116 * to next command of SFR clear command.
1117 */
1118 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1119 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1120 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1121 cmdlist->data[cmdlist->last++] = 0;
1122
1123 /*
1124 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1125 * and GCF bit should be set to INTEN register if user wants
1126 * G2D interrupt event once current command list execution is
1127 * finished.
1128 * Otherwise only ACF bit should be set to INTEN register so
1129 * that one interrupt is occurred after all command lists
1130 * have been completed.
1131 */
1132 if (node->event) {
1133 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1134 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1135 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1136 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1137 } else {
1138 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1139 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1140 }
1141
1142 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1143 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1144 if (size > G2D_CMDLIST_DATA_NUM) {
1145 dev_err(dev, "cmdlist size is too big\n");
1146 ret = -EINVAL;
1147 goto err_free_event;
1148 }
1149
1150 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1151
1152 if (copy_from_user(cmdlist->data + cmdlist->last,
1153 (void __user *)cmd,
1154 sizeof(*cmd) * req->cmd_nr)) {
1155 ret = -EFAULT;
1156 goto err_free_event;
1157 }
1158 cmdlist->last += req->cmd_nr * 2;
1159
1160 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1161 if (ret < 0)
1162 goto err_free_event;
1163
1164 node->buf_info.map_nr = req->cmd_buf_nr;
1165 if (req->cmd_buf_nr) {
1166 struct drm_exynos_g2d_cmd *cmd_buf;
1167
1168 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1169
1170 if (copy_from_user(cmdlist->data + cmdlist->last,
1171 (void __user *)cmd_buf,
1172 sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1173 ret = -EFAULT;
1174 goto err_free_event;
1175 }
1176 cmdlist->last += req->cmd_buf_nr * 2;
1177
1178 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1179 if (ret < 0)
1180 goto err_free_event;
1181
1182 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1183 if (ret < 0)
1184 goto err_unmap;
1185 }
1186
1187 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1188 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1189
1190 /* head */
1191 cmdlist->head = cmdlist->last / 2;
1192
1193 /* tail */
1194 cmdlist->data[cmdlist->last] = 0;
1195
1196 g2d_add_cmdlist_to_inuse(g2d_priv, node);
1197
1198 return 0;
1199
1200err_unmap:
1201 g2d_unmap_cmdlist_gem(g2d, node, file);
1202err_free_event:
1203 if (node->event) {
1204 spin_lock_irqsave(&drm_dev->event_lock, flags);
1205 file->event_space += sizeof(e->event);
1206 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1207 kfree(node->event);
1208 }
1209err:
1210 g2d_put_cmdlist(g2d, node);
1211 return ret;
1212}
1213EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1214
1215int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1216 struct drm_file *file)
1217{
1218 struct drm_exynos_file_private *file_priv = file->driver_priv;
1219 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1220 struct device *dev = g2d_priv->dev;
1221 struct g2d_data *g2d;
1222 struct drm_exynos_g2d_exec *req = data;
1223 struct g2d_runqueue_node *runqueue_node;
1224 struct list_head *run_cmdlist;
1225 struct list_head *event_list;
1226
1227 if (!dev)
1228 return -ENODEV;
1229
1230 g2d = dev_get_drvdata(dev);
1231 if (!g2d)
1232 return -EFAULT;
1233
1234 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1235 if (!runqueue_node) {
1236 dev_err(dev, "failed to allocate memory\n");
1237 return -ENOMEM;
1238 }
1239 run_cmdlist = &runqueue_node->run_cmdlist;
1240 event_list = &runqueue_node->event_list;
1241 INIT_LIST_HEAD(run_cmdlist);
1242 INIT_LIST_HEAD(event_list);
1243 init_completion(&runqueue_node->complete);
1244 runqueue_node->async = req->async;
1245
1246 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1247 list_splice_init(&g2d_priv->event_list, event_list);
1248
1249 if (list_empty(run_cmdlist)) {
1250 dev_err(dev, "there is no inuse cmdlist\n");
1251 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1252 return -EPERM;
1253 }
1254
1255 mutex_lock(&g2d->runqueue_mutex);
1256 runqueue_node->pid = current->pid;
1257 runqueue_node->filp = file;
1258 list_add_tail(&runqueue_node->list, &g2d->runqueue);
1259 if (!g2d->runqueue_node)
1260 g2d_exec_runqueue(g2d);
1261 mutex_unlock(&g2d->runqueue_mutex);
1262
1263 if (runqueue_node->async)
1264 goto out;
1265
1266 wait_for_completion(&runqueue_node->complete);
1267 g2d_free_runqueue_node(g2d, runqueue_node);
1268
1269out:
1270 return 0;
1271}
1272EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1273
1274static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1275{
1276 struct g2d_data *g2d;
1277 int ret;
1278
1279 g2d = dev_get_drvdata(dev);
1280 if (!g2d)
1281 return -EFAULT;
1282
1283 /* allocate dma-aware cmdlist buffer. */
1284 ret = g2d_init_cmdlist(g2d);
1285 if (ret < 0) {
1286 dev_err(dev, "cmdlist init failed\n");
1287 return ret;
1288 }
1289
1290 if (!is_drm_iommu_supported(drm_dev))
1291 return 0;
1292
1293 ret = drm_iommu_attach_device(drm_dev, dev);
1294 if (ret < 0) {
1295 dev_err(dev, "failed to enable iommu.\n");
1296 g2d_fini_cmdlist(g2d);
1297 }
1298
1299 return ret;
1300
1301}
1302
1303static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1304{
1305 if (!is_drm_iommu_supported(drm_dev))
1306 return;
1307
1308 drm_iommu_detach_device(drm_dev, dev);
1309}
1310
1311static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1312 struct drm_file *file)
1313{
1314 struct drm_exynos_file_private *file_priv = file->driver_priv;
1315 struct exynos_drm_g2d_private *g2d_priv;
1316
1317 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1318 if (!g2d_priv)
1319 return -ENOMEM;
1320
1321 g2d_priv->dev = dev;
1322 file_priv->g2d_priv = g2d_priv;
1323
1324 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1325 INIT_LIST_HEAD(&g2d_priv->event_list);
1326 INIT_LIST_HEAD(&g2d_priv->userptr_list);
1327
1328 return 0;
1329}
1330
1331static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1332 struct drm_file *file)
1333{
1334 struct drm_exynos_file_private *file_priv = file->driver_priv;
1335 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1336 struct g2d_data *g2d;
1337 struct g2d_cmdlist_node *node, *n;
1338
1339 if (!dev)
1340 return;
1341
1342 g2d = dev_get_drvdata(dev);
1343 if (!g2d)
1344 return;
1345
1346 mutex_lock(&g2d->cmdlist_mutex);
1347 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1348 /*
1349 * unmap all gem objects not completed.
1350 *
1351 * P.S. if current process was terminated forcely then
1352 * there may be some commands in inuse_cmdlist so unmap
1353 * them.
1354 */
1355 g2d_unmap_cmdlist_gem(g2d, node, file);
1356 list_move_tail(&node->list, &g2d->free_cmdlist);
1357 }
1358 mutex_unlock(&g2d->cmdlist_mutex);
1359
1360 /* release all g2d_userptr in pool. */
1361 g2d_userptr_free_all(drm_dev, g2d, file);
1362
1363 kfree(file_priv->g2d_priv);
1364}
1365
1366static int g2d_probe(struct platform_device *pdev)
1367{
1368 struct device *dev = &pdev->dev;
1369 struct resource *res;
1370 struct g2d_data *g2d;
1371 struct exynos_drm_subdrv *subdrv;
1372 int ret;
1373
1374 g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1375 if (!g2d)
1376 return -ENOMEM;
1377
1378 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1379 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1380 if (!g2d->runqueue_slab)
1381 return -ENOMEM;
1382
1383 g2d->dev = dev;
1384
1385 g2d->g2d_workq = create_singlethread_workqueue("g2d");
1386 if (!g2d->g2d_workq) {
1387 dev_err(dev, "failed to create workqueue\n");
1388 ret = -EINVAL;
1389 goto err_destroy_slab;
1390 }
1391
1392 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1393 INIT_LIST_HEAD(&g2d->free_cmdlist);
1394 INIT_LIST_HEAD(&g2d->runqueue);
1395
1396 mutex_init(&g2d->cmdlist_mutex);
1397 mutex_init(&g2d->runqueue_mutex);
1398
1399 g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1400 if (IS_ERR(g2d->gate_clk)) {
1401 dev_err(dev, "failed to get gate clock\n");
1402 ret = PTR_ERR(g2d->gate_clk);
1403 goto err_destroy_workqueue;
1404 }
1405
1406 pm_runtime_enable(dev);
1407
1408 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1409
1410 g2d->regs = devm_ioremap_resource(dev, res);
1411 if (IS_ERR(g2d->regs)) {
1412 ret = PTR_ERR(g2d->regs);
1413 goto err_put_clk;
1414 }
1415
1416 g2d->irq = platform_get_irq(pdev, 0);
1417 if (g2d->irq < 0) {
1418 dev_err(dev, "failed to get irq\n");
1419 ret = g2d->irq;
1420 goto err_put_clk;
1421 }
1422
1423 ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1424 "drm_g2d", g2d);
1425 if (ret < 0) {
1426 dev_err(dev, "irq request failed\n");
1427 goto err_put_clk;
1428 }
1429
1430 g2d->max_pool = MAX_POOL;
1431
1432 platform_set_drvdata(pdev, g2d);
1433
1434 subdrv = &g2d->subdrv;
1435 subdrv->dev = dev;
1436 subdrv->probe = g2d_subdrv_probe;
1437 subdrv->remove = g2d_subdrv_remove;
1438 subdrv->open = g2d_open;
1439 subdrv->close = g2d_close;
1440
1441 ret = exynos_drm_subdrv_register(subdrv);
1442 if (ret < 0) {
1443 dev_err(dev, "failed to register drm g2d device\n");
1444 goto err_put_clk;
1445 }
1446
1447 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1448 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1449
1450 return 0;
1451
1452err_put_clk:
1453 pm_runtime_disable(dev);
1454err_destroy_workqueue:
1455 destroy_workqueue(g2d->g2d_workq);
1456err_destroy_slab:
1457 kmem_cache_destroy(g2d->runqueue_slab);
1458 return ret;
1459}
1460
1461static int g2d_remove(struct platform_device *pdev)
1462{
1463 struct g2d_data *g2d = platform_get_drvdata(pdev);
1464
1465 cancel_work_sync(&g2d->runqueue_work);
1466 exynos_drm_subdrv_unregister(&g2d->subdrv);
1467
1468 while (g2d->runqueue_node) {
1469 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1470 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1471 }
1472
1473 pm_runtime_disable(&pdev->dev);
1474
1475 g2d_fini_cmdlist(g2d);
1476 destroy_workqueue(g2d->g2d_workq);
1477 kmem_cache_destroy(g2d->runqueue_slab);
1478
1479 return 0;
1480}
1481
1482#ifdef CONFIG_PM_SLEEP
1483static int g2d_suspend(struct device *dev)
1484{
1485 struct g2d_data *g2d = dev_get_drvdata(dev);
1486
1487 mutex_lock(&g2d->runqueue_mutex);
1488 g2d->suspended = true;
1489 mutex_unlock(&g2d->runqueue_mutex);
1490
1491 while (g2d->runqueue_node)
1492 /* FIXME: good range? */
1493 usleep_range(500, 1000);
1494
1495 flush_work(&g2d->runqueue_work);
1496
1497 return 0;
1498}
1499
1500static int g2d_resume(struct device *dev)
1501{
1502 struct g2d_data *g2d = dev_get_drvdata(dev);
1503
1504 g2d->suspended = false;
1505 g2d_exec_runqueue(g2d);
1506
1507 return 0;
1508}
1509#endif
1510
1511#ifdef CONFIG_PM_RUNTIME
1512static int g2d_runtime_suspend(struct device *dev)
1513{
1514 struct g2d_data *g2d = dev_get_drvdata(dev);
1515
1516 clk_disable_unprepare(g2d->gate_clk);
1517
1518 return 0;
1519}
1520
1521static int g2d_runtime_resume(struct device *dev)
1522{
1523 struct g2d_data *g2d = dev_get_drvdata(dev);
1524 int ret;
1525
1526 ret = clk_prepare_enable(g2d->gate_clk);
1527 if (ret < 0)
1528 dev_warn(dev, "failed to enable clock.\n");
1529
1530 return ret;
1531}
1532#endif
1533
1534static const struct dev_pm_ops g2d_pm_ops = {
1535 SET_SYSTEM_SLEEP_PM_OPS(g2d_suspend, g2d_resume)
1536 SET_RUNTIME_PM_OPS(g2d_runtime_suspend, g2d_runtime_resume, NULL)
1537};
1538
1539static const struct of_device_id exynos_g2d_match[] = {
1540 { .compatible = "samsung,exynos5250-g2d" },
1541 {},
1542};
1543
1544struct 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};