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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_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
126enum {
127 BUF_TYPE_GEM = 1,
128 BUF_TYPE_USERPTR,
129};
130
131enum 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 */
143struct 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 */
160struct 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 */
179struct 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
187struct drm_exynos_pending_g2d_event {
188 struct drm_pending_event base;
189 struct drm_exynos_g2d_event event;
190};
191
192struct 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};
203struct 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
212struct 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
222struct 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
250static 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
295err:
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
302static 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
316static 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
336static 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
343static 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
356add_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
363static 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
385out:
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
407static 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
525err_sg_free_table:
526 sg_free_table(sgt);
527
528err_free_sgt:
529 kfree(sgt);
530
531err_put_framevec:
532 put_vaddr_frames(g2d_userptr->vec);
533
534err_destroy_framevec:
535 frame_vector_destroy(g2d_userptr->vec);
536
537err_free:
538 kfree(g2d_userptr);
539
540 return ERR_PTR(ret);
541}
542
543static 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
560static 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
600static 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
627static 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
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
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
899static 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
929static 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
1028err:
1029 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1030 return -EINVAL;
1031}
1032
1033/* ioctl functions */
1034int 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
1060int 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
1206err_unmap:
1207 g2d_unmap_cmdlist_gem(g2d, node, file);
1208err_free_event:
1209 if (node->event)
1210 drm_event_cancel_free(drm_dev, &node->event->base);
1211err:
1212 g2d_put_cmdlist(g2d, node);
1213 return ret;
1214}
1215
1216int 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
1274out:
1275 return 0;
1276}
1277
1278static 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
1304static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1305{
1306 drm_iommu_detach_device(drm_dev, dev);
1307}
1308
1309static 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
1329static 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
1364static 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
1450err_put_clk:
1451 pm_runtime_disable(dev);
1452err_destroy_workqueue:
1453 destroy_workqueue(g2d->g2d_workq);
1454err_destroy_slab:
1455 kmem_cache_destroy(g2d->runqueue_slab);
1456 return ret;
1457}
1458
1459static 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
1481static 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
1498static 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
1510static 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
1519static 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
1532static 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
1537static const struct of_device_id exynos_g2d_match[] = {
1538 { .compatible = "samsung,exynos5250-g2d" },
1539 { .compatible = "samsung,exynos4212-g2d" },
1540 {},
1541};
1542MODULE_DEVICE_TABLE(of, exynos_g2d_match);
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};
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
21#include "drmP.h"
22#include "exynos_drm.h"
23#include "exynos_drm_drv.h"
24#include "exynos_drm_gem.h"
25
26#define G2D_HW_MAJOR_VER 4
27#define G2D_HW_MINOR_VER 1
28
29/* vaild register range set from user: 0x0104 ~ 0x0880 */
30#define G2D_VALID_START 0x0104
31#define G2D_VALID_END 0x0880
32
33/* general registers */
34#define G2D_SOFT_RESET 0x0000
35#define G2D_INTEN 0x0004
36#define G2D_INTC_PEND 0x000C
37#define G2D_DMA_SFR_BASE_ADDR 0x0080
38#define G2D_DMA_COMMAND 0x0084
39#define G2D_DMA_STATUS 0x008C
40#define G2D_DMA_HOLD_CMD 0x0090
41
42/* command registers */
43#define G2D_BITBLT_START 0x0100
44
45/* registers for base address */
46#define G2D_SRC_BASE_ADDR 0x0304
47#define G2D_SRC_PLANE2_BASE_ADDR 0x0318
48#define G2D_DST_BASE_ADDR 0x0404
49#define G2D_DST_PLANE2_BASE_ADDR 0x0418
50#define G2D_PAT_BASE_ADDR 0x0500
51#define G2D_MSK_BASE_ADDR 0x0520
52
53/* G2D_SOFT_RESET */
54#define G2D_SFRCLEAR (1 << 1)
55#define G2D_R (1 << 0)
56
57/* G2D_INTEN */
58#define G2D_INTEN_ACF (1 << 3)
59#define G2D_INTEN_UCF (1 << 2)
60#define G2D_INTEN_GCF (1 << 1)
61#define G2D_INTEN_SCF (1 << 0)
62
63/* G2D_INTC_PEND */
64#define G2D_INTP_ACMD_FIN (1 << 3)
65#define G2D_INTP_UCMD_FIN (1 << 2)
66#define G2D_INTP_GCMD_FIN (1 << 1)
67#define G2D_INTP_SCMD_FIN (1 << 0)
68
69/* G2D_DMA_COMMAND */
70#define G2D_DMA_HALT (1 << 2)
71#define G2D_DMA_CONTINUE (1 << 1)
72#define G2D_DMA_START (1 << 0)
73
74/* G2D_DMA_STATUS */
75#define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
76#define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
77#define G2D_DMA_DONE (1 << 0)
78#define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
79
80/* G2D_DMA_HOLD_CMD */
81#define G2D_USET_HOLD (1 << 2)
82#define G2D_LIST_HOLD (1 << 1)
83#define G2D_BITBLT_HOLD (1 << 0)
84
85/* G2D_BITBLT_START */
86#define G2D_START_CASESEL (1 << 2)
87#define G2D_START_NHOLT (1 << 1)
88#define G2D_START_BITBLT (1 << 0)
89
90#define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
91#define G2D_CMDLIST_NUM 64
92#define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
93#define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
94
95/* cmdlist data structure */
96struct g2d_cmdlist {
97 u32 head;
98 u32 data[G2D_CMDLIST_DATA_NUM];
99 u32 last; /* last data offset */
100};
101
102struct drm_exynos_pending_g2d_event {
103 struct drm_pending_event base;
104 struct drm_exynos_g2d_event event;
105};
106
107struct g2d_gem_node {
108 struct list_head list;
109 unsigned int handle;
110};
111
112struct g2d_cmdlist_node {
113 struct list_head list;
114 struct g2d_cmdlist *cmdlist;
115 unsigned int gem_nr;
116 dma_addr_t dma_addr;
117
118 struct drm_exynos_pending_g2d_event *event;
119};
120
121struct g2d_runqueue_node {
122 struct list_head list;
123 struct list_head run_cmdlist;
124 struct list_head event_list;
125 struct completion complete;
126 int async;
127};
128
129struct g2d_data {
130 struct device *dev;
131 struct clk *gate_clk;
132 struct resource *regs_res;
133 void __iomem *regs;
134 int irq;
135 struct workqueue_struct *g2d_workq;
136 struct work_struct runqueue_work;
137 struct exynos_drm_subdrv subdrv;
138 bool suspended;
139
140 /* cmdlist */
141 struct g2d_cmdlist_node *cmdlist_node;
142 struct list_head free_cmdlist;
143 struct mutex cmdlist_mutex;
144 dma_addr_t cmdlist_pool;
145 void *cmdlist_pool_virt;
146
147 /* runqueue*/
148 struct g2d_runqueue_node *runqueue_node;
149 struct list_head runqueue;
150 struct mutex runqueue_mutex;
151 struct kmem_cache *runqueue_slab;
152};
153
154static int g2d_init_cmdlist(struct g2d_data *g2d)
155{
156 struct device *dev = g2d->dev;
157 struct g2d_cmdlist_node *node = g2d->cmdlist_node;
158 int nr;
159 int ret;
160
161 g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE,
162 &g2d->cmdlist_pool, GFP_KERNEL);
163 if (!g2d->cmdlist_pool_virt) {
164 dev_err(dev, "failed to allocate dma memory\n");
165 return -ENOMEM;
166 }
167
168 node = kcalloc(G2D_CMDLIST_NUM, G2D_CMDLIST_NUM * sizeof(*node),
169 GFP_KERNEL);
170 if (!node) {
171 dev_err(dev, "failed to allocate memory\n");
172 ret = -ENOMEM;
173 goto err;
174 }
175
176 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
177 node[nr].cmdlist =
178 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
179 node[nr].dma_addr =
180 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
181
182 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
183 }
184
185 return 0;
186
187err:
188 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
189 g2d->cmdlist_pool);
190 return ret;
191}
192
193static void g2d_fini_cmdlist(struct g2d_data *g2d)
194{
195 struct device *dev = g2d->dev;
196
197 kfree(g2d->cmdlist_node);
198 dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
199 g2d->cmdlist_pool);
200}
201
202static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
203{
204 struct device *dev = g2d->dev;
205 struct g2d_cmdlist_node *node;
206
207 mutex_lock(&g2d->cmdlist_mutex);
208 if (list_empty(&g2d->free_cmdlist)) {
209 dev_err(dev, "there is no free cmdlist\n");
210 mutex_unlock(&g2d->cmdlist_mutex);
211 return NULL;
212 }
213
214 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
215 list);
216 list_del_init(&node->list);
217 mutex_unlock(&g2d->cmdlist_mutex);
218
219 return node;
220}
221
222static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
223{
224 mutex_lock(&g2d->cmdlist_mutex);
225 list_move_tail(&node->list, &g2d->free_cmdlist);
226 mutex_unlock(&g2d->cmdlist_mutex);
227}
228
229static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
230 struct g2d_cmdlist_node *node)
231{
232 struct g2d_cmdlist_node *lnode;
233
234 if (list_empty(&g2d_priv->inuse_cmdlist))
235 goto add_to_list;
236
237 /* this links to base address of new cmdlist */
238 lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
239 struct g2d_cmdlist_node, list);
240 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
241
242add_to_list:
243 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
244
245 if (node->event)
246 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
247}
248
249static int g2d_get_cmdlist_gem(struct drm_device *drm_dev,
250 struct drm_file *file,
251 struct g2d_cmdlist_node *node)
252{
253 struct drm_exynos_file_private *file_priv = file->driver_priv;
254 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
255 struct g2d_cmdlist *cmdlist = node->cmdlist;
256 dma_addr_t *addr;
257 int offset;
258 int i;
259
260 for (i = 0; i < node->gem_nr; i++) {
261 struct g2d_gem_node *gem_node;
262
263 gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL);
264 if (!gem_node) {
265 dev_err(g2d_priv->dev, "failed to allocate gem node\n");
266 return -ENOMEM;
267 }
268
269 offset = cmdlist->last - (i * 2 + 1);
270 gem_node->handle = cmdlist->data[offset];
271
272 addr = exynos_drm_gem_get_dma_addr(drm_dev, gem_node->handle,
273 file);
274 if (IS_ERR(addr)) {
275 node->gem_nr = i;
276 kfree(gem_node);
277 return PTR_ERR(addr);
278 }
279
280 cmdlist->data[offset] = *addr;
281 list_add_tail(&gem_node->list, &g2d_priv->gem_list);
282 g2d_priv->gem_nr++;
283 }
284
285 return 0;
286}
287
288static void g2d_put_cmdlist_gem(struct drm_device *drm_dev,
289 struct drm_file *file,
290 unsigned int nr)
291{
292 struct drm_exynos_file_private *file_priv = file->driver_priv;
293 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
294 struct g2d_gem_node *node, *n;
295
296 list_for_each_entry_safe_reverse(node, n, &g2d_priv->gem_list, list) {
297 if (!nr)
298 break;
299
300 exynos_drm_gem_put_dma_addr(drm_dev, node->handle, file);
301 list_del_init(&node->list);
302 kfree(node);
303 nr--;
304 }
305}
306
307static void g2d_dma_start(struct g2d_data *g2d,
308 struct g2d_runqueue_node *runqueue_node)
309{
310 struct g2d_cmdlist_node *node =
311 list_first_entry(&runqueue_node->run_cmdlist,
312 struct g2d_cmdlist_node, list);
313
314 pm_runtime_get_sync(g2d->dev);
315 clk_enable(g2d->gate_clk);
316
317 /* interrupt enable */
318 writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF,
319 g2d->regs + G2D_INTEN);
320
321 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
322 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
323}
324
325static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
326{
327 struct g2d_runqueue_node *runqueue_node;
328
329 if (list_empty(&g2d->runqueue))
330 return NULL;
331
332 runqueue_node = list_first_entry(&g2d->runqueue,
333 struct g2d_runqueue_node, list);
334 list_del_init(&runqueue_node->list);
335 return runqueue_node;
336}
337
338static void g2d_free_runqueue_node(struct g2d_data *g2d,
339 struct g2d_runqueue_node *runqueue_node)
340{
341 if (!runqueue_node)
342 return;
343
344 mutex_lock(&g2d->cmdlist_mutex);
345 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
346 mutex_unlock(&g2d->cmdlist_mutex);
347
348 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
349}
350
351static void g2d_exec_runqueue(struct g2d_data *g2d)
352{
353 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
354 if (g2d->runqueue_node)
355 g2d_dma_start(g2d, g2d->runqueue_node);
356}
357
358static void g2d_runqueue_worker(struct work_struct *work)
359{
360 struct g2d_data *g2d = container_of(work, struct g2d_data,
361 runqueue_work);
362
363
364 mutex_lock(&g2d->runqueue_mutex);
365 clk_disable(g2d->gate_clk);
366 pm_runtime_put_sync(g2d->dev);
367
368 complete(&g2d->runqueue_node->complete);
369 if (g2d->runqueue_node->async)
370 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
371
372 if (g2d->suspended)
373 g2d->runqueue_node = NULL;
374 else
375 g2d_exec_runqueue(g2d);
376 mutex_unlock(&g2d->runqueue_mutex);
377}
378
379static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
380{
381 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
382 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
383 struct drm_exynos_pending_g2d_event *e;
384 struct timeval now;
385 unsigned long flags;
386
387 if (list_empty(&runqueue_node->event_list))
388 return;
389
390 e = list_first_entry(&runqueue_node->event_list,
391 struct drm_exynos_pending_g2d_event, base.link);
392
393 do_gettimeofday(&now);
394 e->event.tv_sec = now.tv_sec;
395 e->event.tv_usec = now.tv_usec;
396 e->event.cmdlist_no = cmdlist_no;
397
398 spin_lock_irqsave(&drm_dev->event_lock, flags);
399 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
400 wake_up_interruptible(&e->base.file_priv->event_wait);
401 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
402}
403
404static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
405{
406 struct g2d_data *g2d = dev_id;
407 u32 pending;
408
409 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
410 if (pending)
411 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
412
413 if (pending & G2D_INTP_GCMD_FIN) {
414 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
415
416 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
417 G2D_DMA_LIST_DONE_COUNT_OFFSET;
418
419 g2d_finish_event(g2d, cmdlist_no);
420
421 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
422 if (!(pending & G2D_INTP_ACMD_FIN)) {
423 writel_relaxed(G2D_DMA_CONTINUE,
424 g2d->regs + G2D_DMA_COMMAND);
425 }
426 }
427
428 if (pending & G2D_INTP_ACMD_FIN)
429 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
430
431 return IRQ_HANDLED;
432}
433
434static int g2d_check_reg_offset(struct device *dev, struct g2d_cmdlist *cmdlist,
435 int nr, bool for_addr)
436{
437 int reg_offset;
438 int index;
439 int i;
440
441 for (i = 0; i < nr; i++) {
442 index = cmdlist->last - 2 * (i + 1);
443 reg_offset = cmdlist->data[index] & ~0xfffff000;
444
445 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
446 goto err;
447 if (reg_offset % 4)
448 goto err;
449
450 switch (reg_offset) {
451 case G2D_SRC_BASE_ADDR:
452 case G2D_SRC_PLANE2_BASE_ADDR:
453 case G2D_DST_BASE_ADDR:
454 case G2D_DST_PLANE2_BASE_ADDR:
455 case G2D_PAT_BASE_ADDR:
456 case G2D_MSK_BASE_ADDR:
457 if (!for_addr)
458 goto err;
459 break;
460 default:
461 if (for_addr)
462 goto err;
463 break;
464 }
465 }
466
467 return 0;
468
469err:
470 dev_err(dev, "Bad register offset: 0x%x\n", cmdlist->data[index]);
471 return -EINVAL;
472}
473
474/* ioctl functions */
475int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
476 struct drm_file *file)
477{
478 struct drm_exynos_g2d_get_ver *ver = data;
479
480 ver->major = G2D_HW_MAJOR_VER;
481 ver->minor = G2D_HW_MINOR_VER;
482
483 return 0;
484}
485EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
486
487int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
488 struct drm_file *file)
489{
490 struct drm_exynos_file_private *file_priv = file->driver_priv;
491 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
492 struct device *dev = g2d_priv->dev;
493 struct g2d_data *g2d;
494 struct drm_exynos_g2d_set_cmdlist *req = data;
495 struct drm_exynos_g2d_cmd *cmd;
496 struct drm_exynos_pending_g2d_event *e;
497 struct g2d_cmdlist_node *node;
498 struct g2d_cmdlist *cmdlist;
499 unsigned long flags;
500 int size;
501 int ret;
502
503 if (!dev)
504 return -ENODEV;
505
506 g2d = dev_get_drvdata(dev);
507 if (!g2d)
508 return -EFAULT;
509
510 node = g2d_get_cmdlist(g2d);
511 if (!node)
512 return -ENOMEM;
513
514 node->event = NULL;
515
516 if (req->event_type != G2D_EVENT_NOT) {
517 spin_lock_irqsave(&drm_dev->event_lock, flags);
518 if (file->event_space < sizeof(e->event)) {
519 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
520 ret = -ENOMEM;
521 goto err;
522 }
523 file->event_space -= sizeof(e->event);
524 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
525
526 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
527 if (!e) {
528 dev_err(dev, "failed to allocate event\n");
529
530 spin_lock_irqsave(&drm_dev->event_lock, flags);
531 file->event_space += sizeof(e->event);
532 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
533
534 ret = -ENOMEM;
535 goto err;
536 }
537
538 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
539 e->event.base.length = sizeof(e->event);
540 e->event.user_data = req->user_data;
541 e->base.event = &e->event.base;
542 e->base.file_priv = file;
543 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
544
545 node->event = e;
546 }
547
548 cmdlist = node->cmdlist;
549
550 cmdlist->last = 0;
551
552 /*
553 * If don't clear SFR registers, the cmdlist is affected by register
554 * values of previous cmdlist. G2D hw executes SFR clear command and
555 * a next command at the same time then the next command is ignored and
556 * is executed rightly from next next command, so needs a dummy command
557 * to next command of SFR clear command.
558 */
559 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
560 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
561 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
562 cmdlist->data[cmdlist->last++] = 0;
563
564 if (node->event) {
565 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
566 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
567 }
568
569 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
570 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_gem_nr * 2 + 2;
571 if (size > G2D_CMDLIST_DATA_NUM) {
572 dev_err(dev, "cmdlist size is too big\n");
573 ret = -EINVAL;
574 goto err_free_event;
575 }
576
577 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
578
579 if (copy_from_user(cmdlist->data + cmdlist->last,
580 (void __user *)cmd,
581 sizeof(*cmd) * req->cmd_nr)) {
582 ret = -EFAULT;
583 goto err_free_event;
584 }
585 cmdlist->last += req->cmd_nr * 2;
586
587 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_nr, false);
588 if (ret < 0)
589 goto err_free_event;
590
591 node->gem_nr = req->cmd_gem_nr;
592 if (req->cmd_gem_nr) {
593 struct drm_exynos_g2d_cmd *cmd_gem;
594
595 cmd_gem = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_gem;
596
597 if (copy_from_user(cmdlist->data + cmdlist->last,
598 (void __user *)cmd_gem,
599 sizeof(*cmd_gem) * req->cmd_gem_nr)) {
600 ret = -EFAULT;
601 goto err_free_event;
602 }
603 cmdlist->last += req->cmd_gem_nr * 2;
604
605 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_gem_nr, true);
606 if (ret < 0)
607 goto err_free_event;
608
609 ret = g2d_get_cmdlist_gem(drm_dev, file, node);
610 if (ret < 0)
611 goto err_unmap;
612 }
613
614 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
615 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
616
617 /* head */
618 cmdlist->head = cmdlist->last / 2;
619
620 /* tail */
621 cmdlist->data[cmdlist->last] = 0;
622
623 g2d_add_cmdlist_to_inuse(g2d_priv, node);
624
625 return 0;
626
627err_unmap:
628 g2d_put_cmdlist_gem(drm_dev, file, node->gem_nr);
629err_free_event:
630 if (node->event) {
631 spin_lock_irqsave(&drm_dev->event_lock, flags);
632 file->event_space += sizeof(e->event);
633 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
634 kfree(node->event);
635 }
636err:
637 g2d_put_cmdlist(g2d, node);
638 return ret;
639}
640EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
641
642int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
643 struct drm_file *file)
644{
645 struct drm_exynos_file_private *file_priv = file->driver_priv;
646 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
647 struct device *dev = g2d_priv->dev;
648 struct g2d_data *g2d;
649 struct drm_exynos_g2d_exec *req = data;
650 struct g2d_runqueue_node *runqueue_node;
651 struct list_head *run_cmdlist;
652 struct list_head *event_list;
653
654 if (!dev)
655 return -ENODEV;
656
657 g2d = dev_get_drvdata(dev);
658 if (!g2d)
659 return -EFAULT;
660
661 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
662 if (!runqueue_node) {
663 dev_err(dev, "failed to allocate memory\n");
664 return -ENOMEM;
665 }
666 run_cmdlist = &runqueue_node->run_cmdlist;
667 event_list = &runqueue_node->event_list;
668 INIT_LIST_HEAD(run_cmdlist);
669 INIT_LIST_HEAD(event_list);
670 init_completion(&runqueue_node->complete);
671 runqueue_node->async = req->async;
672
673 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
674 list_splice_init(&g2d_priv->event_list, event_list);
675
676 if (list_empty(run_cmdlist)) {
677 dev_err(dev, "there is no inuse cmdlist\n");
678 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
679 return -EPERM;
680 }
681
682 mutex_lock(&g2d->runqueue_mutex);
683 list_add_tail(&runqueue_node->list, &g2d->runqueue);
684 if (!g2d->runqueue_node)
685 g2d_exec_runqueue(g2d);
686 mutex_unlock(&g2d->runqueue_mutex);
687
688 if (runqueue_node->async)
689 goto out;
690
691 wait_for_completion(&runqueue_node->complete);
692 g2d_free_runqueue_node(g2d, runqueue_node);
693
694out:
695 return 0;
696}
697EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
698
699static int g2d_open(struct drm_device *drm_dev, struct device *dev,
700 struct drm_file *file)
701{
702 struct drm_exynos_file_private *file_priv = file->driver_priv;
703 struct exynos_drm_g2d_private *g2d_priv;
704
705 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
706 if (!g2d_priv) {
707 dev_err(dev, "failed to allocate g2d private data\n");
708 return -ENOMEM;
709 }
710
711 g2d_priv->dev = dev;
712 file_priv->g2d_priv = g2d_priv;
713
714 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
715 INIT_LIST_HEAD(&g2d_priv->event_list);
716 INIT_LIST_HEAD(&g2d_priv->gem_list);
717
718 return 0;
719}
720
721static void g2d_close(struct drm_device *drm_dev, struct device *dev,
722 struct drm_file *file)
723{
724 struct drm_exynos_file_private *file_priv = file->driver_priv;
725 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
726 struct g2d_data *g2d;
727 struct g2d_cmdlist_node *node, *n;
728
729 if (!dev)
730 return;
731
732 g2d = dev_get_drvdata(dev);
733 if (!g2d)
734 return;
735
736 mutex_lock(&g2d->cmdlist_mutex);
737 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list)
738 list_move_tail(&node->list, &g2d->free_cmdlist);
739 mutex_unlock(&g2d->cmdlist_mutex);
740
741 g2d_put_cmdlist_gem(drm_dev, file, g2d_priv->gem_nr);
742
743 kfree(file_priv->g2d_priv);
744}
745
746static int __devinit g2d_probe(struct platform_device *pdev)
747{
748 struct device *dev = &pdev->dev;
749 struct resource *res;
750 struct g2d_data *g2d;
751 struct exynos_drm_subdrv *subdrv;
752 int ret;
753
754 g2d = kzalloc(sizeof(*g2d), GFP_KERNEL);
755 if (!g2d) {
756 dev_err(dev, "failed to allocate driver data\n");
757 return -ENOMEM;
758 }
759
760 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
761 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
762 if (!g2d->runqueue_slab) {
763 ret = -ENOMEM;
764 goto err_free_mem;
765 }
766
767 g2d->dev = dev;
768
769 g2d->g2d_workq = create_singlethread_workqueue("g2d");
770 if (!g2d->g2d_workq) {
771 dev_err(dev, "failed to create workqueue\n");
772 ret = -EINVAL;
773 goto err_destroy_slab;
774 }
775
776 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
777 INIT_LIST_HEAD(&g2d->free_cmdlist);
778 INIT_LIST_HEAD(&g2d->runqueue);
779
780 mutex_init(&g2d->cmdlist_mutex);
781 mutex_init(&g2d->runqueue_mutex);
782
783 ret = g2d_init_cmdlist(g2d);
784 if (ret < 0)
785 goto err_destroy_workqueue;
786
787 g2d->gate_clk = clk_get(dev, "fimg2d");
788 if (IS_ERR(g2d->gate_clk)) {
789 dev_err(dev, "failed to get gate clock\n");
790 ret = PTR_ERR(g2d->gate_clk);
791 goto err_fini_cmdlist;
792 }
793
794 pm_runtime_enable(dev);
795
796 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
797 if (!res) {
798 dev_err(dev, "failed to get I/O memory\n");
799 ret = -ENOENT;
800 goto err_put_clk;
801 }
802
803 g2d->regs_res = request_mem_region(res->start, resource_size(res),
804 dev_name(dev));
805 if (!g2d->regs_res) {
806 dev_err(dev, "failed to request I/O memory\n");
807 ret = -ENOENT;
808 goto err_put_clk;
809 }
810
811 g2d->regs = ioremap(res->start, resource_size(res));
812 if (!g2d->regs) {
813 dev_err(dev, "failed to remap I/O memory\n");
814 ret = -ENXIO;
815 goto err_release_res;
816 }
817
818 g2d->irq = platform_get_irq(pdev, 0);
819 if (g2d->irq < 0) {
820 dev_err(dev, "failed to get irq\n");
821 ret = g2d->irq;
822 goto err_unmap_base;
823 }
824
825 ret = request_irq(g2d->irq, g2d_irq_handler, 0, "drm_g2d", g2d);
826 if (ret < 0) {
827 dev_err(dev, "irq request failed\n");
828 goto err_unmap_base;
829 }
830
831 platform_set_drvdata(pdev, g2d);
832
833 subdrv = &g2d->subdrv;
834 subdrv->dev = dev;
835 subdrv->open = g2d_open;
836 subdrv->close = g2d_close;
837
838 ret = exynos_drm_subdrv_register(subdrv);
839 if (ret < 0) {
840 dev_err(dev, "failed to register drm g2d device\n");
841 goto err_free_irq;
842 }
843
844 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
845 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
846
847 return 0;
848
849err_free_irq:
850 free_irq(g2d->irq, g2d);
851err_unmap_base:
852 iounmap(g2d->regs);
853err_release_res:
854 release_resource(g2d->regs_res);
855 kfree(g2d->regs_res);
856err_put_clk:
857 pm_runtime_disable(dev);
858 clk_put(g2d->gate_clk);
859err_fini_cmdlist:
860 g2d_fini_cmdlist(g2d);
861err_destroy_workqueue:
862 destroy_workqueue(g2d->g2d_workq);
863err_destroy_slab:
864 kmem_cache_destroy(g2d->runqueue_slab);
865err_free_mem:
866 kfree(g2d);
867 return ret;
868}
869
870static int __devexit g2d_remove(struct platform_device *pdev)
871{
872 struct g2d_data *g2d = platform_get_drvdata(pdev);
873
874 cancel_work_sync(&g2d->runqueue_work);
875 exynos_drm_subdrv_unregister(&g2d->subdrv);
876 free_irq(g2d->irq, g2d);
877
878 while (g2d->runqueue_node) {
879 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
880 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
881 }
882
883 iounmap(g2d->regs);
884 release_resource(g2d->regs_res);
885 kfree(g2d->regs_res);
886
887 pm_runtime_disable(&pdev->dev);
888 clk_put(g2d->gate_clk);
889
890 g2d_fini_cmdlist(g2d);
891 destroy_workqueue(g2d->g2d_workq);
892 kmem_cache_destroy(g2d->runqueue_slab);
893 kfree(g2d);
894
895 return 0;
896}
897
898#ifdef CONFIG_PM_SLEEP
899static int g2d_suspend(struct device *dev)
900{
901 struct g2d_data *g2d = dev_get_drvdata(dev);
902
903 mutex_lock(&g2d->runqueue_mutex);
904 g2d->suspended = true;
905 mutex_unlock(&g2d->runqueue_mutex);
906
907 while (g2d->runqueue_node)
908 /* FIXME: good range? */
909 usleep_range(500, 1000);
910
911 flush_work_sync(&g2d->runqueue_work);
912
913 return 0;
914}
915
916static int g2d_resume(struct device *dev)
917{
918 struct g2d_data *g2d = dev_get_drvdata(dev);
919
920 g2d->suspended = false;
921 g2d_exec_runqueue(g2d);
922
923 return 0;
924}
925#endif
926
927SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
928
929struct platform_driver g2d_driver = {
930 .probe = g2d_probe,
931 .remove = __devexit_p(g2d_remove),
932 .driver = {
933 .name = "s5p-g2d",
934 .owner = THIS_MODULE,
935 .pm = &g2d_pm_ops,
936 },
937};