Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
[linux-3.10.git] / drivers / gpu / drm / exynos / exynos_drm_g2d.c
1 /*
2  * Copyright (C) 2012 Samsung Electronics Co.Ltd
3  * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundationr
8  */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/clk.h>
13 #include <linux/err.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20
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 */
96 struct g2d_cmdlist {
97         u32     head;
98         u32     data[G2D_CMDLIST_DATA_NUM];
99         u32     last;   /* last data offset */
100 };
101
102 struct drm_exynos_pending_g2d_event {
103         struct drm_pending_event        base;
104         struct drm_exynos_g2d_event     event;
105 };
106
107 struct g2d_gem_node {
108         struct list_head        list;
109         unsigned int            handle;
110 };
111
112 struct 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
121 struct 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
129 struct g2d_data {
130         struct device                   *dev;
131         struct clk                      *gate_clk;
132         void __iomem                    *regs;
133         int                             irq;
134         struct workqueue_struct         *g2d_workq;
135         struct work_struct              runqueue_work;
136         struct exynos_drm_subdrv        subdrv;
137         bool                            suspended;
138
139         /* cmdlist */
140         struct g2d_cmdlist_node         *cmdlist_node;
141         struct list_head                free_cmdlist;
142         struct mutex                    cmdlist_mutex;
143         dma_addr_t                      cmdlist_pool;
144         void                            *cmdlist_pool_virt;
145
146         /* runqueue*/
147         struct g2d_runqueue_node        *runqueue_node;
148         struct list_head                runqueue;
149         struct mutex                    runqueue_mutex;
150         struct kmem_cache               *runqueue_slab;
151 };
152
153 static int g2d_init_cmdlist(struct g2d_data *g2d)
154 {
155         struct device *dev = g2d->dev;
156         struct g2d_cmdlist_node *node = g2d->cmdlist_node;
157         int nr;
158         int ret;
159
160         g2d->cmdlist_pool_virt = dma_alloc_coherent(dev, G2D_CMDLIST_POOL_SIZE,
161                                                 &g2d->cmdlist_pool, GFP_KERNEL);
162         if (!g2d->cmdlist_pool_virt) {
163                 dev_err(dev, "failed to allocate dma memory\n");
164                 return -ENOMEM;
165         }
166
167         node = kcalloc(G2D_CMDLIST_NUM, G2D_CMDLIST_NUM * sizeof(*node),
168                         GFP_KERNEL);
169         if (!node) {
170                 dev_err(dev, "failed to allocate memory\n");
171                 ret = -ENOMEM;
172                 goto err;
173         }
174
175         for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
176                 node[nr].cmdlist =
177                         g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
178                 node[nr].dma_addr =
179                         g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
180
181                 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
182         }
183
184         return 0;
185
186 err:
187         dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
188                         g2d->cmdlist_pool);
189         return ret;
190 }
191
192 static void g2d_fini_cmdlist(struct g2d_data *g2d)
193 {
194         struct device *dev = g2d->dev;
195
196         kfree(g2d->cmdlist_node);
197         dma_free_coherent(dev, G2D_CMDLIST_POOL_SIZE, g2d->cmdlist_pool_virt,
198                         g2d->cmdlist_pool);
199 }
200
201 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
202 {
203         struct device *dev = g2d->dev;
204         struct g2d_cmdlist_node *node;
205
206         mutex_lock(&g2d->cmdlist_mutex);
207         if (list_empty(&g2d->free_cmdlist)) {
208                 dev_err(dev, "there is no free cmdlist\n");
209                 mutex_unlock(&g2d->cmdlist_mutex);
210                 return NULL;
211         }
212
213         node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
214                                 list);
215         list_del_init(&node->list);
216         mutex_unlock(&g2d->cmdlist_mutex);
217
218         return node;
219 }
220
221 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
222 {
223         mutex_lock(&g2d->cmdlist_mutex);
224         list_move_tail(&node->list, &g2d->free_cmdlist);
225         mutex_unlock(&g2d->cmdlist_mutex);
226 }
227
228 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
229                                      struct g2d_cmdlist_node *node)
230 {
231         struct g2d_cmdlist_node *lnode;
232
233         if (list_empty(&g2d_priv->inuse_cmdlist))
234                 goto add_to_list;
235
236         /* this links to base address of new cmdlist */
237         lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
238                                 struct g2d_cmdlist_node, list);
239         lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
240
241 add_to_list:
242         list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
243
244         if (node->event)
245                 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
246 }
247
248 static int g2d_get_cmdlist_gem(struct drm_device *drm_dev,
249                                struct drm_file *file,
250                                struct g2d_cmdlist_node *node)
251 {
252         struct drm_exynos_file_private *file_priv = file->driver_priv;
253         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
254         struct g2d_cmdlist *cmdlist = node->cmdlist;
255         dma_addr_t *addr;
256         int offset;
257         int i;
258
259         for (i = 0; i < node->gem_nr; i++) {
260                 struct g2d_gem_node *gem_node;
261
262                 gem_node = kzalloc(sizeof(*gem_node), GFP_KERNEL);
263                 if (!gem_node) {
264                         dev_err(g2d_priv->dev, "failed to allocate gem node\n");
265                         return -ENOMEM;
266                 }
267
268                 offset = cmdlist->last - (i * 2 + 1);
269                 gem_node->handle = cmdlist->data[offset];
270
271                 addr = exynos_drm_gem_get_dma_addr(drm_dev, gem_node->handle,
272                                                    file);
273                 if (IS_ERR(addr)) {
274                         node->gem_nr = i;
275                         kfree(gem_node);
276                         return PTR_ERR(addr);
277                 }
278
279                 cmdlist->data[offset] = *addr;
280                 list_add_tail(&gem_node->list, &g2d_priv->gem_list);
281                 g2d_priv->gem_nr++;
282         }
283
284         return 0;
285 }
286
287 static void g2d_put_cmdlist_gem(struct drm_device *drm_dev,
288                                 struct drm_file *file,
289                                 unsigned int nr)
290 {
291         struct drm_exynos_file_private *file_priv = file->driver_priv;
292         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
293         struct g2d_gem_node *node, *n;
294
295         list_for_each_entry_safe_reverse(node, n, &g2d_priv->gem_list, list) {
296                 if (!nr)
297                         break;
298
299                 exynos_drm_gem_put_dma_addr(drm_dev, node->handle, file);
300                 list_del_init(&node->list);
301                 kfree(node);
302                 nr--;
303         }
304 }
305
306 static void g2d_dma_start(struct g2d_data *g2d,
307                           struct g2d_runqueue_node *runqueue_node)
308 {
309         struct g2d_cmdlist_node *node =
310                                 list_first_entry(&runqueue_node->run_cmdlist,
311                                                 struct g2d_cmdlist_node, list);
312
313         pm_runtime_get_sync(g2d->dev);
314         clk_enable(g2d->gate_clk);
315
316         /* interrupt enable */
317         writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF,
318                         g2d->regs + G2D_INTEN);
319
320         writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
321         writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
322 }
323
324 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
325 {
326         struct g2d_runqueue_node *runqueue_node;
327
328         if (list_empty(&g2d->runqueue))
329                 return NULL;
330
331         runqueue_node = list_first_entry(&g2d->runqueue,
332                                          struct g2d_runqueue_node, list);
333         list_del_init(&runqueue_node->list);
334         return runqueue_node;
335 }
336
337 static void g2d_free_runqueue_node(struct g2d_data *g2d,
338                                    struct g2d_runqueue_node *runqueue_node)
339 {
340         if (!runqueue_node)
341                 return;
342
343         mutex_lock(&g2d->cmdlist_mutex);
344         list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
345         mutex_unlock(&g2d->cmdlist_mutex);
346
347         kmem_cache_free(g2d->runqueue_slab, runqueue_node);
348 }
349
350 static void g2d_exec_runqueue(struct g2d_data *g2d)
351 {
352         g2d->runqueue_node = g2d_get_runqueue_node(g2d);
353         if (g2d->runqueue_node)
354                 g2d_dma_start(g2d, g2d->runqueue_node);
355 }
356
357 static void g2d_runqueue_worker(struct work_struct *work)
358 {
359         struct g2d_data *g2d = container_of(work, struct g2d_data,
360                                             runqueue_work);
361
362
363         mutex_lock(&g2d->runqueue_mutex);
364         clk_disable(g2d->gate_clk);
365         pm_runtime_put_sync(g2d->dev);
366
367         complete(&g2d->runqueue_node->complete);
368         if (g2d->runqueue_node->async)
369                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
370
371         if (g2d->suspended)
372                 g2d->runqueue_node = NULL;
373         else
374                 g2d_exec_runqueue(g2d);
375         mutex_unlock(&g2d->runqueue_mutex);
376 }
377
378 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
379 {
380         struct drm_device *drm_dev = g2d->subdrv.drm_dev;
381         struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
382         struct drm_exynos_pending_g2d_event *e;
383         struct timeval now;
384         unsigned long flags;
385
386         if (list_empty(&runqueue_node->event_list))
387                 return;
388
389         e = list_first_entry(&runqueue_node->event_list,
390                              struct drm_exynos_pending_g2d_event, base.link);
391
392         do_gettimeofday(&now);
393         e->event.tv_sec = now.tv_sec;
394         e->event.tv_usec = now.tv_usec;
395         e->event.cmdlist_no = cmdlist_no;
396
397         spin_lock_irqsave(&drm_dev->event_lock, flags);
398         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
399         wake_up_interruptible(&e->base.file_priv->event_wait);
400         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
401 }
402
403 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
404 {
405         struct g2d_data *g2d = dev_id;
406         u32 pending;
407
408         pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
409         if (pending)
410                 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
411
412         if (pending & G2D_INTP_GCMD_FIN) {
413                 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
414
415                 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
416                                                 G2D_DMA_LIST_DONE_COUNT_OFFSET;
417
418                 g2d_finish_event(g2d, cmdlist_no);
419
420                 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
421                 if (!(pending & G2D_INTP_ACMD_FIN)) {
422                         writel_relaxed(G2D_DMA_CONTINUE,
423                                         g2d->regs + G2D_DMA_COMMAND);
424                 }
425         }
426
427         if (pending & G2D_INTP_ACMD_FIN)
428                 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
429
430         return IRQ_HANDLED;
431 }
432
433 static int g2d_check_reg_offset(struct device *dev, struct g2d_cmdlist *cmdlist,
434                                 int nr, bool for_addr)
435 {
436         int reg_offset;
437         int index;
438         int i;
439
440         for (i = 0; i < nr; i++) {
441                 index = cmdlist->last - 2 * (i + 1);
442                 reg_offset = cmdlist->data[index] & ~0xfffff000;
443
444                 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
445                         goto err;
446                 if (reg_offset % 4)
447                         goto err;
448
449                 switch (reg_offset) {
450                 case G2D_SRC_BASE_ADDR:
451                 case G2D_SRC_PLANE2_BASE_ADDR:
452                 case G2D_DST_BASE_ADDR:
453                 case G2D_DST_PLANE2_BASE_ADDR:
454                 case G2D_PAT_BASE_ADDR:
455                 case G2D_MSK_BASE_ADDR:
456                         if (!for_addr)
457                                 goto err;
458                         break;
459                 default:
460                         if (for_addr)
461                                 goto err;
462                         break;
463                 }
464         }
465
466         return 0;
467
468 err:
469         dev_err(dev, "Bad register offset: 0x%x\n", cmdlist->data[index]);
470         return -EINVAL;
471 }
472
473 /* ioctl functions */
474 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
475                              struct drm_file *file)
476 {
477         struct drm_exynos_g2d_get_ver *ver = data;
478
479         ver->major = G2D_HW_MAJOR_VER;
480         ver->minor = G2D_HW_MINOR_VER;
481
482         return 0;
483 }
484 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
485
486 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
487                                  struct drm_file *file)
488 {
489         struct drm_exynos_file_private *file_priv = file->driver_priv;
490         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
491         struct device *dev = g2d_priv->dev;
492         struct g2d_data *g2d;
493         struct drm_exynos_g2d_set_cmdlist *req = data;
494         struct drm_exynos_g2d_cmd *cmd;
495         struct drm_exynos_pending_g2d_event *e;
496         struct g2d_cmdlist_node *node;
497         struct g2d_cmdlist *cmdlist;
498         unsigned long flags;
499         int size;
500         int ret;
501
502         if (!dev)
503                 return -ENODEV;
504
505         g2d = dev_get_drvdata(dev);
506         if (!g2d)
507                 return -EFAULT;
508
509         node = g2d_get_cmdlist(g2d);
510         if (!node)
511                 return -ENOMEM;
512
513         node->event = NULL;
514
515         if (req->event_type != G2D_EVENT_NOT) {
516                 spin_lock_irqsave(&drm_dev->event_lock, flags);
517                 if (file->event_space < sizeof(e->event)) {
518                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
519                         ret = -ENOMEM;
520                         goto err;
521                 }
522                 file->event_space -= sizeof(e->event);
523                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
524
525                 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
526                 if (!e) {
527                         dev_err(dev, "failed to allocate event\n");
528
529                         spin_lock_irqsave(&drm_dev->event_lock, flags);
530                         file->event_space += sizeof(e->event);
531                         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
532
533                         ret = -ENOMEM;
534                         goto err;
535                 }
536
537                 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
538                 e->event.base.length = sizeof(e->event);
539                 e->event.user_data = req->user_data;
540                 e->base.event = &e->event.base;
541                 e->base.file_priv = file;
542                 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
543
544                 node->event = e;
545         }
546
547         cmdlist = node->cmdlist;
548
549         cmdlist->last = 0;
550
551         /*
552          * If don't clear SFR registers, the cmdlist is affected by register
553          * values of previous cmdlist. G2D hw executes SFR clear command and
554          * a next command at the same time then the next command is ignored and
555          * is executed rightly from next next command, so needs a dummy command
556          * to next command of SFR clear command.
557          */
558         cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
559         cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
560         cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
561         cmdlist->data[cmdlist->last++] = 0;
562
563         if (node->event) {
564                 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
565                 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
566         }
567
568         /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
569         size = cmdlist->last + req->cmd_nr * 2 + req->cmd_gem_nr * 2 + 2;
570         if (size > G2D_CMDLIST_DATA_NUM) {
571                 dev_err(dev, "cmdlist size is too big\n");
572                 ret = -EINVAL;
573                 goto err_free_event;
574         }
575
576         cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
577
578         if (copy_from_user(cmdlist->data + cmdlist->last,
579                                 (void __user *)cmd,
580                                 sizeof(*cmd) * req->cmd_nr)) {
581                 ret = -EFAULT;
582                 goto err_free_event;
583         }
584         cmdlist->last += req->cmd_nr * 2;
585
586         ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_nr, false);
587         if (ret < 0)
588                 goto err_free_event;
589
590         node->gem_nr = req->cmd_gem_nr;
591         if (req->cmd_gem_nr) {
592                 struct drm_exynos_g2d_cmd *cmd_gem;
593
594                 cmd_gem = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_gem;
595
596                 if (copy_from_user(cmdlist->data + cmdlist->last,
597                                         (void __user *)cmd_gem,
598                                         sizeof(*cmd_gem) * req->cmd_gem_nr)) {
599                         ret = -EFAULT;
600                         goto err_free_event;
601                 }
602                 cmdlist->last += req->cmd_gem_nr * 2;
603
604                 ret = g2d_check_reg_offset(dev, cmdlist, req->cmd_gem_nr, true);
605                 if (ret < 0)
606                         goto err_free_event;
607
608                 ret = g2d_get_cmdlist_gem(drm_dev, file, node);
609                 if (ret < 0)
610                         goto err_unmap;
611         }
612
613         cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
614         cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
615
616         /* head */
617         cmdlist->head = cmdlist->last / 2;
618
619         /* tail */
620         cmdlist->data[cmdlist->last] = 0;
621
622         g2d_add_cmdlist_to_inuse(g2d_priv, node);
623
624         return 0;
625
626 err_unmap:
627         g2d_put_cmdlist_gem(drm_dev, file, node->gem_nr);
628 err_free_event:
629         if (node->event) {
630                 spin_lock_irqsave(&drm_dev->event_lock, flags);
631                 file->event_space += sizeof(e->event);
632                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
633                 kfree(node->event);
634         }
635 err:
636         g2d_put_cmdlist(g2d, node);
637         return ret;
638 }
639 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
640
641 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
642                           struct drm_file *file)
643 {
644         struct drm_exynos_file_private *file_priv = file->driver_priv;
645         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
646         struct device *dev = g2d_priv->dev;
647         struct g2d_data *g2d;
648         struct drm_exynos_g2d_exec *req = data;
649         struct g2d_runqueue_node *runqueue_node;
650         struct list_head *run_cmdlist;
651         struct list_head *event_list;
652
653         if (!dev)
654                 return -ENODEV;
655
656         g2d = dev_get_drvdata(dev);
657         if (!g2d)
658                 return -EFAULT;
659
660         runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
661         if (!runqueue_node) {
662                 dev_err(dev, "failed to allocate memory\n");
663                 return -ENOMEM;
664         }
665         run_cmdlist = &runqueue_node->run_cmdlist;
666         event_list = &runqueue_node->event_list;
667         INIT_LIST_HEAD(run_cmdlist);
668         INIT_LIST_HEAD(event_list);
669         init_completion(&runqueue_node->complete);
670         runqueue_node->async = req->async;
671
672         list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
673         list_splice_init(&g2d_priv->event_list, event_list);
674
675         if (list_empty(run_cmdlist)) {
676                 dev_err(dev, "there is no inuse cmdlist\n");
677                 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
678                 return -EPERM;
679         }
680
681         mutex_lock(&g2d->runqueue_mutex);
682         list_add_tail(&runqueue_node->list, &g2d->runqueue);
683         if (!g2d->runqueue_node)
684                 g2d_exec_runqueue(g2d);
685         mutex_unlock(&g2d->runqueue_mutex);
686
687         if (runqueue_node->async)
688                 goto out;
689
690         wait_for_completion(&runqueue_node->complete);
691         g2d_free_runqueue_node(g2d, runqueue_node);
692
693 out:
694         return 0;
695 }
696 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
697
698 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
699                         struct drm_file *file)
700 {
701         struct drm_exynos_file_private *file_priv = file->driver_priv;
702         struct exynos_drm_g2d_private *g2d_priv;
703
704         g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
705         if (!g2d_priv) {
706                 dev_err(dev, "failed to allocate g2d private data\n");
707                 return -ENOMEM;
708         }
709
710         g2d_priv->dev = dev;
711         file_priv->g2d_priv = g2d_priv;
712
713         INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
714         INIT_LIST_HEAD(&g2d_priv->event_list);
715         INIT_LIST_HEAD(&g2d_priv->gem_list);
716
717         return 0;
718 }
719
720 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
721                         struct drm_file *file)
722 {
723         struct drm_exynos_file_private *file_priv = file->driver_priv;
724         struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
725         struct g2d_data *g2d;
726         struct g2d_cmdlist_node *node, *n;
727
728         if (!dev)
729                 return;
730
731         g2d = dev_get_drvdata(dev);
732         if (!g2d)
733                 return;
734
735         mutex_lock(&g2d->cmdlist_mutex);
736         list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list)
737                 list_move_tail(&node->list, &g2d->free_cmdlist);
738         mutex_unlock(&g2d->cmdlist_mutex);
739
740         g2d_put_cmdlist_gem(drm_dev, file, g2d_priv->gem_nr);
741
742         kfree(file_priv->g2d_priv);
743 }
744
745 static int __devinit g2d_probe(struct platform_device *pdev)
746 {
747         struct device *dev = &pdev->dev;
748         struct resource *res;
749         struct g2d_data *g2d;
750         struct exynos_drm_subdrv *subdrv;
751         int ret;
752
753         g2d = devm_kzalloc(&pdev->dev, sizeof(*g2d), GFP_KERNEL);
754         if (!g2d) {
755                 dev_err(dev, "failed to allocate driver data\n");
756                 return -ENOMEM;
757         }
758
759         g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
760                         sizeof(struct g2d_runqueue_node), 0, 0, NULL);
761         if (!g2d->runqueue_slab)
762                 return -ENOMEM;
763
764         g2d->dev = dev;
765
766         g2d->g2d_workq = create_singlethread_workqueue("g2d");
767         if (!g2d->g2d_workq) {
768                 dev_err(dev, "failed to create workqueue\n");
769                 ret = -EINVAL;
770                 goto err_destroy_slab;
771         }
772
773         INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
774         INIT_LIST_HEAD(&g2d->free_cmdlist);
775         INIT_LIST_HEAD(&g2d->runqueue);
776
777         mutex_init(&g2d->cmdlist_mutex);
778         mutex_init(&g2d->runqueue_mutex);
779
780         ret = g2d_init_cmdlist(g2d);
781         if (ret < 0)
782                 goto err_destroy_workqueue;
783
784         g2d->gate_clk = clk_get(dev, "fimg2d");
785         if (IS_ERR(g2d->gate_clk)) {
786                 dev_err(dev, "failed to get gate clock\n");
787                 ret = PTR_ERR(g2d->gate_clk);
788                 goto err_fini_cmdlist;
789         }
790
791         pm_runtime_enable(dev);
792
793         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
794
795         g2d->regs = devm_request_and_ioremap(&pdev->dev, res);
796         if (!g2d->regs) {
797                 dev_err(dev, "failed to remap I/O memory\n");
798                 ret = -ENXIO;
799                 goto err_put_clk;
800         }
801
802         g2d->irq = platform_get_irq(pdev, 0);
803         if (g2d->irq < 0) {
804                 dev_err(dev, "failed to get irq\n");
805                 ret = g2d->irq;
806                 goto err_put_clk;
807         }
808
809         ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0,
810                                                                 "drm_g2d", g2d);
811         if (ret < 0) {
812                 dev_err(dev, "irq request failed\n");
813                 goto err_put_clk;
814         }
815
816         platform_set_drvdata(pdev, g2d);
817
818         subdrv = &g2d->subdrv;
819         subdrv->dev = dev;
820         subdrv->open = g2d_open;
821         subdrv->close = g2d_close;
822
823         ret = exynos_drm_subdrv_register(subdrv);
824         if (ret < 0) {
825                 dev_err(dev, "failed to register drm g2d device\n");
826                 goto err_put_clk;
827         }
828
829         dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
830                         G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
831
832         return 0;
833
834 err_put_clk:
835         pm_runtime_disable(dev);
836         clk_put(g2d->gate_clk);
837 err_fini_cmdlist:
838         g2d_fini_cmdlist(g2d);
839 err_destroy_workqueue:
840         destroy_workqueue(g2d->g2d_workq);
841 err_destroy_slab:
842         kmem_cache_destroy(g2d->runqueue_slab);
843         return ret;
844 }
845
846 static int __devexit g2d_remove(struct platform_device *pdev)
847 {
848         struct g2d_data *g2d = platform_get_drvdata(pdev);
849
850         cancel_work_sync(&g2d->runqueue_work);
851         exynos_drm_subdrv_unregister(&g2d->subdrv);
852
853         while (g2d->runqueue_node) {
854                 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
855                 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
856         }
857
858         pm_runtime_disable(&pdev->dev);
859         clk_put(g2d->gate_clk);
860
861         g2d_fini_cmdlist(g2d);
862         destroy_workqueue(g2d->g2d_workq);
863         kmem_cache_destroy(g2d->runqueue_slab);
864
865         return 0;
866 }
867
868 #ifdef CONFIG_PM_SLEEP
869 static int g2d_suspend(struct device *dev)
870 {
871         struct g2d_data *g2d = dev_get_drvdata(dev);
872
873         mutex_lock(&g2d->runqueue_mutex);
874         g2d->suspended = true;
875         mutex_unlock(&g2d->runqueue_mutex);
876
877         while (g2d->runqueue_node)
878                 /* FIXME: good range? */
879                 usleep_range(500, 1000);
880
881         flush_work(&g2d->runqueue_work);
882
883         return 0;
884 }
885
886 static int g2d_resume(struct device *dev)
887 {
888         struct g2d_data *g2d = dev_get_drvdata(dev);
889
890         g2d->suspended = false;
891         g2d_exec_runqueue(g2d);
892
893         return 0;
894 }
895 #endif
896
897 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
898
899 struct platform_driver g2d_driver = {
900         .probe          = g2d_probe,
901         .remove         = __devexit_p(g2d_remove),
902         .driver         = {
903                 .name   = "s5p-g2d",
904                 .owner  = THIS_MODULE,
905                 .pm     = &g2d_pm_ops,
906         },
907 };