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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas...
[deliverable/linux.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_sync(&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 };
Linux kernel - Deliverables
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