Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
exynos_drm_g2d.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2012 Samsung Electronics Co.Ltd
3  * Authors: Joonyoung Shim <[email protected]>
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 <drm/drmP.h>
22 #include <drm/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  pid_t pid;
126  struct completion complete;
127  int async;
128 };
129 
130 struct g2d_data {
131  struct device *dev;
132  struct clk *gate_clk;
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 
154 static 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, sizeof(*node), 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  runqueue_node->pid = current->pid;
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 
694 out:
695  return 0;
696 }
697 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
698 
699 static 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 
721 static 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 
746 static 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 = devm_kzalloc(&pdev->dev, 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  return -ENOMEM;
764 
765  g2d->dev = dev;
766 
767  g2d->g2d_workq = create_singlethread_workqueue("g2d");
768  if (!g2d->g2d_workq) {
769  dev_err(dev, "failed to create workqueue\n");
770  ret = -EINVAL;
771  goto err_destroy_slab;
772  }
773 
774  INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
775  INIT_LIST_HEAD(&g2d->free_cmdlist);
776  INIT_LIST_HEAD(&g2d->runqueue);
777 
778  mutex_init(&g2d->cmdlist_mutex);
779  mutex_init(&g2d->runqueue_mutex);
780 
781  ret = g2d_init_cmdlist(g2d);
782  if (ret < 0)
783  goto err_destroy_workqueue;
784 
785  g2d->gate_clk = clk_get(dev, "fimg2d");
786  if (IS_ERR(g2d->gate_clk)) {
787  dev_err(dev, "failed to get gate clock\n");
788  ret = PTR_ERR(g2d->gate_clk);
789  goto err_fini_cmdlist;
790  }
791 
792  pm_runtime_enable(dev);
793 
794  res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
795 
796  g2d->regs = devm_request_and_ioremap(&pdev->dev, res);
797  if (!g2d->regs) {
798  dev_err(dev, "failed to remap I/O memory\n");
799  ret = -ENXIO;
800  goto err_put_clk;
801  }
802 
803  g2d->irq = platform_get_irq(pdev, 0);
804  if (g2d->irq < 0) {
805  dev_err(dev, "failed to get irq\n");
806  ret = g2d->irq;
807  goto err_put_clk;
808  }
809 
810  ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0,
811  "drm_g2d", g2d);
812  if (ret < 0) {
813  dev_err(dev, "irq request failed\n");
814  goto err_put_clk;
815  }
816 
817  platform_set_drvdata(pdev, g2d);
818 
819  subdrv = &g2d->subdrv;
820  subdrv->dev = dev;
821  subdrv->open = g2d_open;
822  subdrv->close = g2d_close;
823 
824  ret = exynos_drm_subdrv_register(subdrv);
825  if (ret < 0) {
826  dev_err(dev, "failed to register drm g2d device\n");
827  goto err_put_clk;
828  }
829 
830  dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
831  G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
832 
833  return 0;
834 
835 err_put_clk:
836  pm_runtime_disable(dev);
837  clk_put(g2d->gate_clk);
838 err_fini_cmdlist:
839  g2d_fini_cmdlist(g2d);
840 err_destroy_workqueue:
841  destroy_workqueue(g2d->g2d_workq);
842 err_destroy_slab:
843  kmem_cache_destroy(g2d->runqueue_slab);
844  return ret;
845 }
846 
847 static int __devexit g2d_remove(struct platform_device *pdev)
848 {
849  struct g2d_data *g2d = platform_get_drvdata(pdev);
850 
851  cancel_work_sync(&g2d->runqueue_work);
852  exynos_drm_subdrv_unregister(&g2d->subdrv);
853 
854  while (g2d->runqueue_node) {
855  g2d_free_runqueue_node(g2d, g2d->runqueue_node);
856  g2d->runqueue_node = g2d_get_runqueue_node(g2d);
857  }
858 
859  pm_runtime_disable(&pdev->dev);
860  clk_put(g2d->gate_clk);
861 
862  g2d_fini_cmdlist(g2d);
863  destroy_workqueue(g2d->g2d_workq);
864  kmem_cache_destroy(g2d->runqueue_slab);
865 
866  return 0;
867 }
868 
869 #ifdef CONFIG_PM_SLEEP
870 static int g2d_suspend(struct device *dev)
871 {
872  struct g2d_data *g2d = dev_get_drvdata(dev);
873 
874  mutex_lock(&g2d->runqueue_mutex);
875  g2d->suspended = true;
876  mutex_unlock(&g2d->runqueue_mutex);
877 
878  while (g2d->runqueue_node)
879  /* FIXME: good range? */
880  usleep_range(500, 1000);
881 
882  flush_work(&g2d->runqueue_work);
883 
884  return 0;
885 }
886 
887 static int g2d_resume(struct device *dev)
888 {
889  struct g2d_data *g2d = dev_get_drvdata(dev);
890 
891  g2d->suspended = false;
892  g2d_exec_runqueue(g2d);
893 
894  return 0;
895 }
896 #endif
897 
898 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
899 
900 struct platform_driver g2d_driver = {
901  .probe = g2d_probe,
902  .remove = __devexit_p(g2d_remove),
903  .driver = {
904  .name = "s5p-g2d",
905  .owner = THIS_MODULE,
906  .pm = &g2d_pm_ops,
907  },
908 };
Generated on Thu Jan 10 2013 13:31:22 for Linux Kernel by   doxygen 1.8.2