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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/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};