2 * Copyright (C) 2012 Samsung Electronics Co.Ltd
3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
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
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>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/dma-attrs.h>
25 #include <drm/exynos_drm.h>
26 #include "exynos_drm_drv.h"
27 #include "exynos_drm_gem.h"
28 #include "exynos_drm_iommu.h"
30 #define G2D_HW_MAJOR_VER 4
31 #define G2D_HW_MINOR_VER 1
33 /* vaild register range set from user: 0x0104 ~ 0x0880 */
34 #define G2D_VALID_START 0x0104
35 #define G2D_VALID_END 0x0880
37 /* general registers */
38 #define G2D_SOFT_RESET 0x0000
39 #define G2D_INTEN 0x0004
40 #define G2D_INTC_PEND 0x000C
41 #define G2D_DMA_SFR_BASE_ADDR 0x0080
42 #define G2D_DMA_COMMAND 0x0084
43 #define G2D_DMA_STATUS 0x008C
44 #define G2D_DMA_HOLD_CMD 0x0090
46 /* command registers */
47 #define G2D_BITBLT_START 0x0100
49 /* registers for base address */
50 #define G2D_SRC_BASE_ADDR 0x0304
51 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318
52 #define G2D_DST_BASE_ADDR 0x0404
53 #define G2D_DST_PLANE2_BASE_ADDR 0x0418
54 #define G2D_PAT_BASE_ADDR 0x0500
55 #define G2D_MSK_BASE_ADDR 0x0520
58 #define G2D_SFRCLEAR (1 << 1)
59 #define G2D_R (1 << 0)
62 #define G2D_INTEN_ACF (1 << 3)
63 #define G2D_INTEN_UCF (1 << 2)
64 #define G2D_INTEN_GCF (1 << 1)
65 #define G2D_INTEN_SCF (1 << 0)
68 #define G2D_INTP_ACMD_FIN (1 << 3)
69 #define G2D_INTP_UCMD_FIN (1 << 2)
70 #define G2D_INTP_GCMD_FIN (1 << 1)
71 #define G2D_INTP_SCMD_FIN (1 << 0)
74 #define G2D_DMA_HALT (1 << 2)
75 #define G2D_DMA_CONTINUE (1 << 1)
76 #define G2D_DMA_START (1 << 0)
79 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
80 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
81 #define G2D_DMA_DONE (1 << 0)
82 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
84 /* G2D_DMA_HOLD_CMD */
85 #define G2D_USET_HOLD (1 << 2)
86 #define G2D_LIST_HOLD (1 << 1)
87 #define G2D_BITBLT_HOLD (1 << 0)
89 /* G2D_BITBLT_START */
90 #define G2D_START_CASESEL (1 << 2)
91 #define G2D_START_NHOLT (1 << 1)
92 #define G2D_START_BITBLT (1 << 0)
94 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
95 #define G2D_CMDLIST_NUM 64
96 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
97 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
99 #define MAX_BUF_ADDR_NR 6
101 /* maximum buffer pool size of userptr is 64MB as default */
102 #define MAX_POOL (64 * 1024 * 1024)
109 /* cmdlist data structure */
112 unsigned long data[G2D_CMDLIST_DATA_NUM];
113 u32 last; /* last data offset */
116 struct drm_exynos_pending_g2d_event {
117 struct drm_pending_event base;
118 struct drm_exynos_g2d_event event;
121 struct g2d_cmdlist_userptr {
122 struct list_head list;
124 unsigned long userptr;
128 struct sg_table *sgt;
129 struct vm_area_struct *vma;
135 struct g2d_cmdlist_node {
136 struct list_head list;
137 struct g2d_cmdlist *cmdlist;
139 unsigned long handles[MAX_BUF_ADDR_NR];
140 unsigned int obj_type[MAX_BUF_ADDR_NR];
143 struct drm_exynos_pending_g2d_event *event;
146 struct g2d_runqueue_node {
147 struct list_head list;
148 struct list_head run_cmdlist;
149 struct list_head event_list;
150 struct drm_file *filp;
152 struct completion complete;
158 struct clk *gate_clk;
161 struct workqueue_struct *g2d_workq;
162 struct work_struct runqueue_work;
163 struct exynos_drm_subdrv subdrv;
167 struct g2d_cmdlist_node *cmdlist_node;
168 struct list_head free_cmdlist;
169 struct mutex cmdlist_mutex;
170 dma_addr_t cmdlist_pool;
171 void *cmdlist_pool_virt;
172 struct dma_attrs cmdlist_dma_attrs;
175 struct g2d_runqueue_node *runqueue_node;
176 struct list_head runqueue;
177 struct mutex runqueue_mutex;
178 struct kmem_cache *runqueue_slab;
180 unsigned long current_pool;
181 unsigned long max_pool;
184 static int g2d_init_cmdlist(struct g2d_data *g2d)
186 struct device *dev = g2d->dev;
187 struct g2d_cmdlist_node *node = g2d->cmdlist_node;
188 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
192 init_dma_attrs(&g2d->cmdlist_dma_attrs);
193 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
195 g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
196 G2D_CMDLIST_POOL_SIZE,
197 &g2d->cmdlist_pool, GFP_KERNEL,
198 &g2d->cmdlist_dma_attrs);
199 if (!g2d->cmdlist_pool_virt) {
200 dev_err(dev, "failed to allocate dma memory\n");
204 node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
206 dev_err(dev, "failed to allocate memory\n");
211 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
213 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
215 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
217 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
223 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
224 g2d->cmdlist_pool_virt,
225 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
229 static void g2d_fini_cmdlist(struct g2d_data *g2d)
231 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
233 kfree(g2d->cmdlist_node);
234 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
235 g2d->cmdlist_pool_virt,
236 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
239 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
241 struct device *dev = g2d->dev;
242 struct g2d_cmdlist_node *node;
244 mutex_lock(&g2d->cmdlist_mutex);
245 if (list_empty(&g2d->free_cmdlist)) {
246 dev_err(dev, "there is no free cmdlist\n");
247 mutex_unlock(&g2d->cmdlist_mutex);
251 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
253 list_del_init(&node->list);
254 mutex_unlock(&g2d->cmdlist_mutex);
259 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
261 mutex_lock(&g2d->cmdlist_mutex);
262 list_move_tail(&node->list, &g2d->free_cmdlist);
263 mutex_unlock(&g2d->cmdlist_mutex);
266 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
267 struct g2d_cmdlist_node *node)
269 struct g2d_cmdlist_node *lnode;
271 if (list_empty(&g2d_priv->inuse_cmdlist))
274 /* this links to base address of new cmdlist */
275 lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
276 struct g2d_cmdlist_node, list);
277 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
280 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
283 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
286 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
290 struct g2d_cmdlist_userptr *g2d_userptr =
291 (struct g2d_cmdlist_userptr *)obj;
299 atomic_dec(&g2d_userptr->refcount);
301 if (atomic_read(&g2d_userptr->refcount) > 0)
304 if (g2d_userptr->in_pool)
308 exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
311 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
315 if (!g2d_userptr->out_of_list)
316 list_del_init(&g2d_userptr->list);
318 sg_free_table(g2d_userptr->sgt);
319 kfree(g2d_userptr->sgt);
320 g2d_userptr->sgt = NULL;
322 kfree(g2d_userptr->pages);
323 g2d_userptr->pages = NULL;
328 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
329 unsigned long userptr,
331 struct drm_file *filp,
334 struct drm_exynos_file_private *file_priv = filp->driver_priv;
335 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
336 struct g2d_cmdlist_userptr *g2d_userptr;
337 struct g2d_data *g2d;
339 struct sg_table *sgt;
340 struct vm_area_struct *vma;
341 unsigned long start, end;
342 unsigned int npages, offset;
346 DRM_ERROR("invalid userptr size.\n");
347 return ERR_PTR(-EINVAL);
350 g2d = dev_get_drvdata(g2d_priv->dev);
352 /* check if userptr already exists in userptr_list. */
353 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
354 if (g2d_userptr->userptr == userptr) {
356 * also check size because there could be same address
357 * and different size.
359 if (g2d_userptr->size == size) {
360 atomic_inc(&g2d_userptr->refcount);
361 *obj = (unsigned long)g2d_userptr;
363 return &g2d_userptr->dma_addr;
367 * at this moment, maybe g2d dma is accessing this
368 * g2d_userptr memory region so just remove this
369 * g2d_userptr object from userptr_list not to be
370 * referred again and also except it the userptr
371 * pool to be released after the dma access completion.
373 g2d_userptr->out_of_list = true;
374 g2d_userptr->in_pool = false;
375 list_del_init(&g2d_userptr->list);
381 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
383 DRM_ERROR("failed to allocate g2d_userptr.\n");
384 return ERR_PTR(-ENOMEM);
387 atomic_set(&g2d_userptr->refcount, 1);
389 start = userptr & PAGE_MASK;
390 offset = userptr & ~PAGE_MASK;
391 end = PAGE_ALIGN(userptr + size);
392 npages = (end - start) >> PAGE_SHIFT;
393 g2d_userptr->npages = npages;
395 pages = kzalloc(npages * sizeof(struct page *), GFP_KERNEL);
397 DRM_ERROR("failed to allocate pages.\n");
399 return ERR_PTR(-ENOMEM);
402 vma = find_vma(current->mm, userptr);
404 DRM_ERROR("failed to get vm region.\n");
409 if (vma->vm_end < userptr + size) {
410 DRM_ERROR("vma is too small.\n");
415 g2d_userptr->vma = exynos_gem_get_vma(vma);
416 if (!g2d_userptr->vma) {
417 DRM_ERROR("failed to copy vma.\n");
422 g2d_userptr->size = size;
424 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
427 DRM_ERROR("failed to get user pages from userptr.\n");
431 g2d_userptr->pages = pages;
433 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
435 DRM_ERROR("failed to allocate sg table.\n");
437 goto err_free_userptr;
440 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
443 DRM_ERROR("failed to get sgt from pages.\n");
447 g2d_userptr->sgt = sgt;
449 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
452 DRM_ERROR("failed to map sgt with dma region.\n");
456 g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
457 g2d_userptr->userptr = userptr;
459 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
461 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
462 g2d->current_pool += npages << PAGE_SHIFT;
463 g2d_userptr->in_pool = true;
466 *obj = (unsigned long)g2d_userptr;
468 return &g2d_userptr->dma_addr;
476 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
481 exynos_gem_put_vma(g2d_userptr->vma);
492 static void g2d_userptr_free_all(struct drm_device *drm_dev,
493 struct g2d_data *g2d,
494 struct drm_file *filp)
496 struct drm_exynos_file_private *file_priv = filp->driver_priv;
497 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
498 struct g2d_cmdlist_userptr *g2d_userptr, *n;
500 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
501 if (g2d_userptr->in_pool)
502 g2d_userptr_put_dma_addr(drm_dev,
503 (unsigned long)g2d_userptr,
506 g2d->current_pool = 0;
509 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
510 struct g2d_cmdlist_node *node,
511 struct drm_device *drm_dev,
512 struct drm_file *file)
514 struct g2d_cmdlist *cmdlist = node->cmdlist;
518 for (i = 0; i < node->map_nr; i++) {
519 unsigned long handle;
522 offset = cmdlist->last - (i * 2 + 1);
523 handle = cmdlist->data[offset];
525 if (node->obj_type[i] == BUF_TYPE_GEM) {
526 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
533 struct drm_exynos_g2d_userptr g2d_userptr;
535 if (copy_from_user(&g2d_userptr, (void __user *)handle,
536 sizeof(struct drm_exynos_g2d_userptr))) {
541 addr = g2d_userptr_get_dma_addr(drm_dev,
552 cmdlist->data[offset] = *addr;
553 node->handles[i] = handle;
559 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
560 struct g2d_cmdlist_node *node,
561 struct drm_file *filp)
563 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
566 for (i = 0; i < node->map_nr; i++) {
567 unsigned long handle = node->handles[i];
569 if (node->obj_type[i] == BUF_TYPE_GEM)
570 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
573 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
576 node->handles[i] = 0;
582 static void g2d_dma_start(struct g2d_data *g2d,
583 struct g2d_runqueue_node *runqueue_node)
585 struct g2d_cmdlist_node *node =
586 list_first_entry(&runqueue_node->run_cmdlist,
587 struct g2d_cmdlist_node, list);
589 pm_runtime_get_sync(g2d->dev);
590 clk_enable(g2d->gate_clk);
592 /* interrupt enable */
593 writel_relaxed(G2D_INTEN_ACF | G2D_INTEN_UCF | G2D_INTEN_GCF,
594 g2d->regs + G2D_INTEN);
596 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
597 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
600 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
602 struct g2d_runqueue_node *runqueue_node;
604 if (list_empty(&g2d->runqueue))
607 runqueue_node = list_first_entry(&g2d->runqueue,
608 struct g2d_runqueue_node, list);
609 list_del_init(&runqueue_node->list);
610 return runqueue_node;
613 static void g2d_free_runqueue_node(struct g2d_data *g2d,
614 struct g2d_runqueue_node *runqueue_node)
616 struct g2d_cmdlist_node *node;
621 mutex_lock(&g2d->cmdlist_mutex);
623 * commands in run_cmdlist have been completed so unmap all gem
624 * objects in each command node so that they are unreferenced.
626 list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
627 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
628 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
629 mutex_unlock(&g2d->cmdlist_mutex);
631 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
634 static void g2d_exec_runqueue(struct g2d_data *g2d)
636 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
637 if (g2d->runqueue_node)
638 g2d_dma_start(g2d, g2d->runqueue_node);
641 static void g2d_runqueue_worker(struct work_struct *work)
643 struct g2d_data *g2d = container_of(work, struct g2d_data,
647 mutex_lock(&g2d->runqueue_mutex);
648 clk_disable(g2d->gate_clk);
649 pm_runtime_put_sync(g2d->dev);
651 complete(&g2d->runqueue_node->complete);
652 if (g2d->runqueue_node->async)
653 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
656 g2d->runqueue_node = NULL;
658 g2d_exec_runqueue(g2d);
659 mutex_unlock(&g2d->runqueue_mutex);
662 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
664 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
665 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
666 struct drm_exynos_pending_g2d_event *e;
670 if (list_empty(&runqueue_node->event_list))
673 e = list_first_entry(&runqueue_node->event_list,
674 struct drm_exynos_pending_g2d_event, base.link);
676 do_gettimeofday(&now);
677 e->event.tv_sec = now.tv_sec;
678 e->event.tv_usec = now.tv_usec;
679 e->event.cmdlist_no = cmdlist_no;
681 spin_lock_irqsave(&drm_dev->event_lock, flags);
682 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
683 wake_up_interruptible(&e->base.file_priv->event_wait);
684 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
687 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
689 struct g2d_data *g2d = dev_id;
692 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
694 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
696 if (pending & G2D_INTP_GCMD_FIN) {
697 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
699 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
700 G2D_DMA_LIST_DONE_COUNT_OFFSET;
702 g2d_finish_event(g2d, cmdlist_no);
704 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
705 if (!(pending & G2D_INTP_ACMD_FIN)) {
706 writel_relaxed(G2D_DMA_CONTINUE,
707 g2d->regs + G2D_DMA_COMMAND);
711 if (pending & G2D_INTP_ACMD_FIN)
712 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
717 static int g2d_check_reg_offset(struct device *dev,
718 struct g2d_cmdlist_node *node,
719 int nr, bool for_addr)
721 struct g2d_cmdlist *cmdlist = node->cmdlist;
726 for (i = 0; i < nr; i++) {
727 index = cmdlist->last - 2 * (i + 1);
730 /* check userptr buffer type. */
731 reg_offset = (cmdlist->data[index] &
734 node->obj_type[i] = BUF_TYPE_USERPTR;
735 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
739 reg_offset = cmdlist->data[index] & ~0xfffff000;
741 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
746 switch (reg_offset) {
747 case G2D_SRC_BASE_ADDR:
748 case G2D_SRC_PLANE2_BASE_ADDR:
749 case G2D_DST_BASE_ADDR:
750 case G2D_DST_PLANE2_BASE_ADDR:
751 case G2D_PAT_BASE_ADDR:
752 case G2D_MSK_BASE_ADDR:
756 if (node->obj_type[i] != BUF_TYPE_USERPTR)
757 node->obj_type[i] = BUF_TYPE_GEM;
769 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
773 /* ioctl functions */
774 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
775 struct drm_file *file)
777 struct drm_exynos_g2d_get_ver *ver = data;
779 ver->major = G2D_HW_MAJOR_VER;
780 ver->minor = G2D_HW_MINOR_VER;
784 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
786 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
787 struct drm_file *file)
789 struct drm_exynos_file_private *file_priv = file->driver_priv;
790 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
791 struct device *dev = g2d_priv->dev;
792 struct g2d_data *g2d;
793 struct drm_exynos_g2d_set_cmdlist *req = data;
794 struct drm_exynos_g2d_cmd *cmd;
795 struct drm_exynos_pending_g2d_event *e;
796 struct g2d_cmdlist_node *node;
797 struct g2d_cmdlist *cmdlist;
805 g2d = dev_get_drvdata(dev);
809 node = g2d_get_cmdlist(g2d);
815 if (req->event_type != G2D_EVENT_NOT) {
816 spin_lock_irqsave(&drm_dev->event_lock, flags);
817 if (file->event_space < sizeof(e->event)) {
818 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
822 file->event_space -= sizeof(e->event);
823 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
825 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
827 dev_err(dev, "failed to allocate event\n");
829 spin_lock_irqsave(&drm_dev->event_lock, flags);
830 file->event_space += sizeof(e->event);
831 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
837 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
838 e->event.base.length = sizeof(e->event);
839 e->event.user_data = req->user_data;
840 e->base.event = &e->event.base;
841 e->base.file_priv = file;
842 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
847 cmdlist = node->cmdlist;
852 * If don't clear SFR registers, the cmdlist is affected by register
853 * values of previous cmdlist. G2D hw executes SFR clear command and
854 * a next command at the same time then the next command is ignored and
855 * is executed rightly from next next command, so needs a dummy command
856 * to next command of SFR clear command.
858 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
859 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
860 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
861 cmdlist->data[cmdlist->last++] = 0;
864 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
865 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
868 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
869 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
870 if (size > G2D_CMDLIST_DATA_NUM) {
871 dev_err(dev, "cmdlist size is too big\n");
876 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
878 if (copy_from_user(cmdlist->data + cmdlist->last,
880 sizeof(*cmd) * req->cmd_nr)) {
884 cmdlist->last += req->cmd_nr * 2;
886 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
890 node->map_nr = req->cmd_buf_nr;
891 if (req->cmd_buf_nr) {
892 struct drm_exynos_g2d_cmd *cmd_buf;
894 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
896 if (copy_from_user(cmdlist->data + cmdlist->last,
897 (void __user *)cmd_buf,
898 sizeof(*cmd_buf) * req->cmd_buf_nr)) {
902 cmdlist->last += req->cmd_buf_nr * 2;
904 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
908 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
913 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
914 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
917 cmdlist->head = cmdlist->last / 2;
920 cmdlist->data[cmdlist->last] = 0;
922 g2d_add_cmdlist_to_inuse(g2d_priv, node);
927 g2d_unmap_cmdlist_gem(g2d, node, file);
930 spin_lock_irqsave(&drm_dev->event_lock, flags);
931 file->event_space += sizeof(e->event);
932 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
936 g2d_put_cmdlist(g2d, node);
939 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
941 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
942 struct drm_file *file)
944 struct drm_exynos_file_private *file_priv = file->driver_priv;
945 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
946 struct device *dev = g2d_priv->dev;
947 struct g2d_data *g2d;
948 struct drm_exynos_g2d_exec *req = data;
949 struct g2d_runqueue_node *runqueue_node;
950 struct list_head *run_cmdlist;
951 struct list_head *event_list;
956 g2d = dev_get_drvdata(dev);
960 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
961 if (!runqueue_node) {
962 dev_err(dev, "failed to allocate memory\n");
965 run_cmdlist = &runqueue_node->run_cmdlist;
966 event_list = &runqueue_node->event_list;
967 INIT_LIST_HEAD(run_cmdlist);
968 INIT_LIST_HEAD(event_list);
969 init_completion(&runqueue_node->complete);
970 runqueue_node->async = req->async;
972 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
973 list_splice_init(&g2d_priv->event_list, event_list);
975 if (list_empty(run_cmdlist)) {
976 dev_err(dev, "there is no inuse cmdlist\n");
977 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
981 mutex_lock(&g2d->runqueue_mutex);
982 runqueue_node->pid = current->pid;
983 runqueue_node->filp = file;
984 list_add_tail(&runqueue_node->list, &g2d->runqueue);
985 if (!g2d->runqueue_node)
986 g2d_exec_runqueue(g2d);
987 mutex_unlock(&g2d->runqueue_mutex);
989 if (runqueue_node->async)
992 wait_for_completion(&runqueue_node->complete);
993 g2d_free_runqueue_node(g2d, runqueue_node);
998 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1000 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1002 struct g2d_data *g2d;
1005 g2d = dev_get_drvdata(dev);
1009 /* allocate dma-aware cmdlist buffer. */
1010 ret = g2d_init_cmdlist(g2d);
1012 dev_err(dev, "cmdlist init failed\n");
1016 if (!is_drm_iommu_supported(drm_dev))
1019 ret = drm_iommu_attach_device(drm_dev, dev);
1021 dev_err(dev, "failed to enable iommu.\n");
1022 g2d_fini_cmdlist(g2d);
1029 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1031 if (!is_drm_iommu_supported(drm_dev))
1034 drm_iommu_detach_device(drm_dev, dev);
1037 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1038 struct drm_file *file)
1040 struct drm_exynos_file_private *file_priv = file->driver_priv;
1041 struct exynos_drm_g2d_private *g2d_priv;
1043 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1045 dev_err(dev, "failed to allocate g2d private data\n");
1049 g2d_priv->dev = dev;
1050 file_priv->g2d_priv = g2d_priv;
1052 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1053 INIT_LIST_HEAD(&g2d_priv->event_list);
1054 INIT_LIST_HEAD(&g2d_priv->userptr_list);
1059 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1060 struct drm_file *file)
1062 struct drm_exynos_file_private *file_priv = file->driver_priv;
1063 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1064 struct g2d_data *g2d;
1065 struct g2d_cmdlist_node *node, *n;
1070 g2d = dev_get_drvdata(dev);
1074 mutex_lock(&g2d->cmdlist_mutex);
1075 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1077 * unmap all gem objects not completed.
1079 * P.S. if current process was terminated forcely then
1080 * there may be some commands in inuse_cmdlist so unmap
1083 g2d_unmap_cmdlist_gem(g2d, node, file);
1084 list_move_tail(&node->list, &g2d->free_cmdlist);
1086 mutex_unlock(&g2d->cmdlist_mutex);
1088 /* release all g2d_userptr in pool. */
1089 g2d_userptr_free_all(drm_dev, g2d, file);
1091 kfree(file_priv->g2d_priv);
1094 static int g2d_probe(struct platform_device *pdev)
1096 struct device *dev = &pdev->dev;
1097 struct resource *res;
1098 struct g2d_data *g2d;
1099 struct exynos_drm_subdrv *subdrv;
1102 g2d = devm_kzalloc(&pdev->dev, sizeof(*g2d), GFP_KERNEL);
1104 dev_err(dev, "failed to allocate driver data\n");
1108 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1109 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1110 if (!g2d->runqueue_slab)
1115 g2d->g2d_workq = create_singlethread_workqueue("g2d");
1116 if (!g2d->g2d_workq) {
1117 dev_err(dev, "failed to create workqueue\n");
1119 goto err_destroy_slab;
1122 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1123 INIT_LIST_HEAD(&g2d->free_cmdlist);
1124 INIT_LIST_HEAD(&g2d->runqueue);
1126 mutex_init(&g2d->cmdlist_mutex);
1127 mutex_init(&g2d->runqueue_mutex);
1129 g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1130 if (IS_ERR(g2d->gate_clk)) {
1131 dev_err(dev, "failed to get gate clock\n");
1132 ret = PTR_ERR(g2d->gate_clk);
1133 goto err_destroy_workqueue;
1136 pm_runtime_enable(dev);
1138 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1140 g2d->regs = devm_ioremap_resource(&pdev->dev, res);
1141 if (IS_ERR(g2d->regs)) {
1142 ret = PTR_ERR(g2d->regs);
1146 g2d->irq = platform_get_irq(pdev, 0);
1148 dev_err(dev, "failed to get irq\n");
1153 ret = devm_request_irq(&pdev->dev, g2d->irq, g2d_irq_handler, 0,
1156 dev_err(dev, "irq request failed\n");
1160 g2d->max_pool = MAX_POOL;
1162 platform_set_drvdata(pdev, g2d);
1164 subdrv = &g2d->subdrv;
1166 subdrv->probe = g2d_subdrv_probe;
1167 subdrv->remove = g2d_subdrv_remove;
1168 subdrv->open = g2d_open;
1169 subdrv->close = g2d_close;
1171 ret = exynos_drm_subdrv_register(subdrv);
1173 dev_err(dev, "failed to register drm g2d device\n");
1177 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1178 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1183 pm_runtime_disable(dev);
1184 err_destroy_workqueue:
1185 destroy_workqueue(g2d->g2d_workq);
1187 kmem_cache_destroy(g2d->runqueue_slab);
1191 static int g2d_remove(struct platform_device *pdev)
1193 struct g2d_data *g2d = platform_get_drvdata(pdev);
1195 cancel_work_sync(&g2d->runqueue_work);
1196 exynos_drm_subdrv_unregister(&g2d->subdrv);
1198 while (g2d->runqueue_node) {
1199 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1200 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1203 pm_runtime_disable(&pdev->dev);
1205 g2d_fini_cmdlist(g2d);
1206 destroy_workqueue(g2d->g2d_workq);
1207 kmem_cache_destroy(g2d->runqueue_slab);
1212 #ifdef CONFIG_PM_SLEEP
1213 static int g2d_suspend(struct device *dev)
1215 struct g2d_data *g2d = dev_get_drvdata(dev);
1217 mutex_lock(&g2d->runqueue_mutex);
1218 g2d->suspended = true;
1219 mutex_unlock(&g2d->runqueue_mutex);
1221 while (g2d->runqueue_node)
1222 /* FIXME: good range? */
1223 usleep_range(500, 1000);
1225 flush_work(&g2d->runqueue_work);
1230 static int g2d_resume(struct device *dev)
1232 struct g2d_data *g2d = dev_get_drvdata(dev);
1234 g2d->suspended = false;
1235 g2d_exec_runqueue(g2d);
1241 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
1244 static const struct of_device_id exynos_g2d_match[] = {
1245 { .compatible = "samsung,exynos5250-g2d" },
1248 MODULE_DEVICE_TABLE(of, exynos_g2d_match);
1251 struct platform_driver g2d_driver = {
1253 .remove = g2d_remove,
1256 .owner = THIS_MODULE,
1258 .of_match_table = of_match_ptr(exynos_g2d_match),