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/clk.h>
12 #include <linux/err.h>
13 #include <linux/interrupt.h>
15 #include <linux/platform_device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/slab.h>
18 #include <linux/workqueue.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/dma-attrs.h>
24 #include <drm/exynos_drm.h>
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_gem.h"
27 #include "exynos_drm_iommu.h"
29 #define G2D_HW_MAJOR_VER 4
30 #define G2D_HW_MINOR_VER 1
32 /* vaild register range set from user: 0x0104 ~ 0x0880 */
33 #define G2D_VALID_START 0x0104
34 #define G2D_VALID_END 0x0880
36 /* general registers */
37 #define G2D_SOFT_RESET 0x0000
38 #define G2D_INTEN 0x0004
39 #define G2D_INTC_PEND 0x000C
40 #define G2D_DMA_SFR_BASE_ADDR 0x0080
41 #define G2D_DMA_COMMAND 0x0084
42 #define G2D_DMA_STATUS 0x008C
43 #define G2D_DMA_HOLD_CMD 0x0090
45 /* command registers */
46 #define G2D_BITBLT_START 0x0100
48 /* registers for base address */
49 #define G2D_SRC_BASE_ADDR 0x0304
50 #define G2D_SRC_COLOR_MODE 0x030C
51 #define G2D_SRC_LEFT_TOP 0x0310
52 #define G2D_SRC_RIGHT_BOTTOM 0x0314
53 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318
54 #define G2D_DST_BASE_ADDR 0x0404
55 #define G2D_DST_COLOR_MODE 0x040C
56 #define G2D_DST_LEFT_TOP 0x0410
57 #define G2D_DST_RIGHT_BOTTOM 0x0414
58 #define G2D_DST_PLANE2_BASE_ADDR 0x0418
59 #define G2D_PAT_BASE_ADDR 0x0500
60 #define G2D_MSK_BASE_ADDR 0x0520
63 #define G2D_SFRCLEAR (1 << 1)
64 #define G2D_R (1 << 0)
67 #define G2D_INTEN_ACF (1 << 3)
68 #define G2D_INTEN_UCF (1 << 2)
69 #define G2D_INTEN_GCF (1 << 1)
70 #define G2D_INTEN_SCF (1 << 0)
73 #define G2D_INTP_ACMD_FIN (1 << 3)
74 #define G2D_INTP_UCMD_FIN (1 << 2)
75 #define G2D_INTP_GCMD_FIN (1 << 1)
76 #define G2D_INTP_SCMD_FIN (1 << 0)
79 #define G2D_DMA_HALT (1 << 2)
80 #define G2D_DMA_CONTINUE (1 << 1)
81 #define G2D_DMA_START (1 << 0)
84 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
85 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
86 #define G2D_DMA_DONE (1 << 0)
87 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
89 /* G2D_DMA_HOLD_CMD */
90 #define G2D_USER_HOLD (1 << 2)
91 #define G2D_LIST_HOLD (1 << 1)
92 #define G2D_BITBLT_HOLD (1 << 0)
94 /* G2D_BITBLT_START */
95 #define G2D_START_CASESEL (1 << 2)
96 #define G2D_START_NHOLT (1 << 1)
97 #define G2D_START_BITBLT (1 << 0)
99 /* buffer color format */
100 #define G2D_FMT_XRGB8888 0
101 #define G2D_FMT_ARGB8888 1
102 #define G2D_FMT_RGB565 2
103 #define G2D_FMT_XRGB1555 3
104 #define G2D_FMT_ARGB1555 4
105 #define G2D_FMT_XRGB4444 5
106 #define G2D_FMT_ARGB4444 6
107 #define G2D_FMT_PACKED_RGB888 7
108 #define G2D_FMT_A8 11
109 #define G2D_FMT_L8 12
111 /* buffer valid length */
112 #define G2D_LEN_MIN 1
113 #define G2D_LEN_MAX 8000
115 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
116 #define G2D_CMDLIST_NUM 64
117 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
118 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
120 /* maximum buffer pool size of userptr is 64MB as default */
121 #define MAX_POOL (64 * 1024 * 1024)
139 /* cmdlist data structure */
142 unsigned long data[G2D_CMDLIST_DATA_NUM];
143 u32 last; /* last data offset */
147 * A structure of buffer description
149 * @format: color format
150 * @left_x: the x coordinates of left top corner
151 * @top_y: the y coordinates of left top corner
152 * @right_x: the x coordinates of right bottom corner
153 * @bottom_y: the y coordinates of right bottom corner
156 struct g2d_buf_desc {
160 unsigned int right_x;
161 unsigned int bottom_y;
165 * A structure of buffer information
167 * @map_nr: manages the number of mapped buffers
168 * @reg_types: stores regitster type in the order of requested command
169 * @handles: stores buffer handle in its reg_type position
170 * @types: stores buffer type in its reg_type position
171 * @descs: stores buffer description in its reg_type position
174 struct g2d_buf_info {
176 enum g2d_reg_type reg_types[MAX_REG_TYPE_NR];
177 unsigned long handles[MAX_REG_TYPE_NR];
178 unsigned int types[MAX_REG_TYPE_NR];
179 struct g2d_buf_desc descs[MAX_REG_TYPE_NR];
182 struct drm_exynos_pending_g2d_event {
183 struct drm_pending_event base;
184 struct drm_exynos_g2d_event event;
187 struct g2d_cmdlist_userptr {
188 struct list_head list;
190 unsigned long userptr;
194 struct sg_table *sgt;
195 struct vm_area_struct *vma;
200 struct g2d_cmdlist_node {
201 struct list_head list;
202 struct g2d_cmdlist *cmdlist;
204 struct g2d_buf_info buf_info;
206 struct drm_exynos_pending_g2d_event *event;
209 struct g2d_runqueue_node {
210 struct list_head list;
211 struct list_head run_cmdlist;
212 struct list_head event_list;
213 struct drm_file *filp;
215 struct completion complete;
221 struct clk *gate_clk;
224 struct workqueue_struct *g2d_workq;
225 struct work_struct runqueue_work;
226 struct exynos_drm_subdrv subdrv;
230 struct g2d_cmdlist_node *cmdlist_node;
231 struct list_head free_cmdlist;
232 struct mutex cmdlist_mutex;
233 dma_addr_t cmdlist_pool;
234 void *cmdlist_pool_virt;
235 struct dma_attrs cmdlist_dma_attrs;
238 struct g2d_runqueue_node *runqueue_node;
239 struct list_head runqueue;
240 struct mutex runqueue_mutex;
241 struct kmem_cache *runqueue_slab;
243 unsigned long current_pool;
244 unsigned long max_pool;
247 static int g2d_init_cmdlist(struct g2d_data *g2d)
249 struct device *dev = g2d->dev;
250 struct g2d_cmdlist_node *node = g2d->cmdlist_node;
251 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
254 struct g2d_buf_info *buf_info;
256 init_dma_attrs(&g2d->cmdlist_dma_attrs);
257 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &g2d->cmdlist_dma_attrs);
259 g2d->cmdlist_pool_virt = dma_alloc_attrs(subdrv->drm_dev->dev,
260 G2D_CMDLIST_POOL_SIZE,
261 &g2d->cmdlist_pool, GFP_KERNEL,
262 &g2d->cmdlist_dma_attrs);
263 if (!g2d->cmdlist_pool_virt) {
264 dev_err(dev, "failed to allocate dma memory\n");
268 node = kcalloc(G2D_CMDLIST_NUM, sizeof(*node), GFP_KERNEL);
270 dev_err(dev, "failed to allocate memory\n");
275 for (nr = 0; nr < G2D_CMDLIST_NUM; nr++) {
279 g2d->cmdlist_pool_virt + nr * G2D_CMDLIST_SIZE;
281 g2d->cmdlist_pool + nr * G2D_CMDLIST_SIZE;
283 buf_info = &node[nr].buf_info;
284 for (i = 0; i < MAX_REG_TYPE_NR; i++)
285 buf_info->reg_types[i] = REG_TYPE_NONE;
287 list_add_tail(&node[nr].list, &g2d->free_cmdlist);
293 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
294 g2d->cmdlist_pool_virt,
295 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
299 static void g2d_fini_cmdlist(struct g2d_data *g2d)
301 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
303 kfree(g2d->cmdlist_node);
304 dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
305 g2d->cmdlist_pool_virt,
306 g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
309 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
311 struct device *dev = g2d->dev;
312 struct g2d_cmdlist_node *node;
314 mutex_lock(&g2d->cmdlist_mutex);
315 if (list_empty(&g2d->free_cmdlist)) {
316 dev_err(dev, "there is no free cmdlist\n");
317 mutex_unlock(&g2d->cmdlist_mutex);
321 node = list_first_entry(&g2d->free_cmdlist, struct g2d_cmdlist_node,
323 list_del_init(&node->list);
324 mutex_unlock(&g2d->cmdlist_mutex);
329 static void g2d_put_cmdlist(struct g2d_data *g2d, struct g2d_cmdlist_node *node)
331 mutex_lock(&g2d->cmdlist_mutex);
332 list_move_tail(&node->list, &g2d->free_cmdlist);
333 mutex_unlock(&g2d->cmdlist_mutex);
336 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv,
337 struct g2d_cmdlist_node *node)
339 struct g2d_cmdlist_node *lnode;
341 if (list_empty(&g2d_priv->inuse_cmdlist))
344 /* this links to base address of new cmdlist */
345 lnode = list_entry(g2d_priv->inuse_cmdlist.prev,
346 struct g2d_cmdlist_node, list);
347 lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr;
350 list_add_tail(&node->list, &g2d_priv->inuse_cmdlist);
353 list_add_tail(&node->event->base.link, &g2d_priv->event_list);
356 static void g2d_userptr_put_dma_addr(struct drm_device *drm_dev,
360 struct g2d_cmdlist_userptr *g2d_userptr =
361 (struct g2d_cmdlist_userptr *)obj;
369 atomic_dec(&g2d_userptr->refcount);
371 if (atomic_read(&g2d_userptr->refcount) > 0)
374 if (g2d_userptr->in_pool)
378 exynos_gem_unmap_sgt_from_dma(drm_dev, g2d_userptr->sgt,
381 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
385 if (!g2d_userptr->out_of_list)
386 list_del_init(&g2d_userptr->list);
388 sg_free_table(g2d_userptr->sgt);
389 kfree(g2d_userptr->sgt);
391 drm_free_large(g2d_userptr->pages);
395 static dma_addr_t *g2d_userptr_get_dma_addr(struct drm_device *drm_dev,
396 unsigned long userptr,
398 struct drm_file *filp,
401 struct drm_exynos_file_private *file_priv = filp->driver_priv;
402 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
403 struct g2d_cmdlist_userptr *g2d_userptr;
404 struct g2d_data *g2d;
406 struct sg_table *sgt;
407 struct vm_area_struct *vma;
408 unsigned long start, end;
409 unsigned int npages, offset;
413 DRM_ERROR("invalid userptr size.\n");
414 return ERR_PTR(-EINVAL);
417 g2d = dev_get_drvdata(g2d_priv->dev);
419 /* check if userptr already exists in userptr_list. */
420 list_for_each_entry(g2d_userptr, &g2d_priv->userptr_list, list) {
421 if (g2d_userptr->userptr == userptr) {
423 * also check size because there could be same address
424 * and different size.
426 if (g2d_userptr->size == size) {
427 atomic_inc(&g2d_userptr->refcount);
428 *obj = (unsigned long)g2d_userptr;
430 return &g2d_userptr->dma_addr;
434 * at this moment, maybe g2d dma is accessing this
435 * g2d_userptr memory region so just remove this
436 * g2d_userptr object from userptr_list not to be
437 * referred again and also except it the userptr
438 * pool to be released after the dma access completion.
440 g2d_userptr->out_of_list = true;
441 g2d_userptr->in_pool = false;
442 list_del_init(&g2d_userptr->list);
448 g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
450 DRM_ERROR("failed to allocate g2d_userptr.\n");
451 return ERR_PTR(-ENOMEM);
454 atomic_set(&g2d_userptr->refcount, 1);
456 start = userptr & PAGE_MASK;
457 offset = userptr & ~PAGE_MASK;
458 end = PAGE_ALIGN(userptr + size);
459 npages = (end - start) >> PAGE_SHIFT;
460 g2d_userptr->npages = npages;
462 pages = drm_calloc_large(npages, sizeof(struct page *));
464 DRM_ERROR("failed to allocate pages.\n");
469 vma = find_vma(current->mm, userptr);
471 DRM_ERROR("failed to get vm region.\n");
476 if (vma->vm_end < userptr + size) {
477 DRM_ERROR("vma is too small.\n");
482 g2d_userptr->vma = exynos_gem_get_vma(vma);
483 if (!g2d_userptr->vma) {
484 DRM_ERROR("failed to copy vma.\n");
489 g2d_userptr->size = size;
491 ret = exynos_gem_get_pages_from_userptr(start & PAGE_MASK,
494 DRM_ERROR("failed to get user pages from userptr.\n");
498 g2d_userptr->pages = pages;
500 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
502 DRM_ERROR("failed to allocate sg table.\n");
504 goto err_free_userptr;
507 ret = sg_alloc_table_from_pages(sgt, pages, npages, offset,
510 DRM_ERROR("failed to get sgt from pages.\n");
514 g2d_userptr->sgt = sgt;
516 ret = exynos_gem_map_sgt_with_dma(drm_dev, g2d_userptr->sgt,
519 DRM_ERROR("failed to map sgt with dma region.\n");
520 goto err_sg_free_table;
523 g2d_userptr->dma_addr = sgt->sgl[0].dma_address;
524 g2d_userptr->userptr = userptr;
526 list_add_tail(&g2d_userptr->list, &g2d_priv->userptr_list);
528 if (g2d->current_pool + (npages << PAGE_SHIFT) < g2d->max_pool) {
529 g2d->current_pool += npages << PAGE_SHIFT;
530 g2d_userptr->in_pool = true;
533 *obj = (unsigned long)g2d_userptr;
535 return &g2d_userptr->dma_addr;
544 exynos_gem_put_pages_to_userptr(g2d_userptr->pages,
549 exynos_gem_put_vma(g2d_userptr->vma);
552 drm_free_large(pages);
560 static void g2d_userptr_free_all(struct drm_device *drm_dev,
561 struct g2d_data *g2d,
562 struct drm_file *filp)
564 struct drm_exynos_file_private *file_priv = filp->driver_priv;
565 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
566 struct g2d_cmdlist_userptr *g2d_userptr, *n;
568 list_for_each_entry_safe(g2d_userptr, n, &g2d_priv->userptr_list, list)
569 if (g2d_userptr->in_pool)
570 g2d_userptr_put_dma_addr(drm_dev,
571 (unsigned long)g2d_userptr,
574 g2d->current_pool = 0;
577 static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
579 enum g2d_reg_type reg_type;
581 switch (reg_offset) {
582 case G2D_SRC_BASE_ADDR:
583 case G2D_SRC_COLOR_MODE:
584 case G2D_SRC_LEFT_TOP:
585 case G2D_SRC_RIGHT_BOTTOM:
586 reg_type = REG_TYPE_SRC;
588 case G2D_SRC_PLANE2_BASE_ADDR:
589 reg_type = REG_TYPE_SRC_PLANE2;
591 case G2D_DST_BASE_ADDR:
592 case G2D_DST_COLOR_MODE:
593 case G2D_DST_LEFT_TOP:
594 case G2D_DST_RIGHT_BOTTOM:
595 reg_type = REG_TYPE_DST;
597 case G2D_DST_PLANE2_BASE_ADDR:
598 reg_type = REG_TYPE_DST_PLANE2;
600 case G2D_PAT_BASE_ADDR:
601 reg_type = REG_TYPE_PAT;
603 case G2D_MSK_BASE_ADDR:
604 reg_type = REG_TYPE_MSK;
607 reg_type = REG_TYPE_NONE;
608 DRM_ERROR("Unknown register offset![%d]\n", reg_offset);
615 static unsigned long g2d_get_buf_bpp(unsigned int format)
620 case G2D_FMT_XRGB8888:
621 case G2D_FMT_ARGB8888:
625 case G2D_FMT_XRGB1555:
626 case G2D_FMT_ARGB1555:
627 case G2D_FMT_XRGB4444:
628 case G2D_FMT_ARGB4444:
631 case G2D_FMT_PACKED_RGB888:
642 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
643 enum g2d_reg_type reg_type,
646 unsigned int width, height;
650 * check source and destination buffers only.
651 * so the others are always valid.
653 if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
656 width = buf_desc->right_x - buf_desc->left_x;
657 if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
658 DRM_ERROR("width[%u] is out of range!\n", width);
662 height = buf_desc->bottom_y - buf_desc->top_y;
663 if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
664 DRM_ERROR("height[%u] is out of range!\n", height);
668 area = (unsigned long)width * (unsigned long)height *
669 g2d_get_buf_bpp(buf_desc->format);
671 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
678 static int g2d_map_cmdlist_gem(struct g2d_data *g2d,
679 struct g2d_cmdlist_node *node,
680 struct drm_device *drm_dev,
681 struct drm_file *file)
683 struct g2d_cmdlist *cmdlist = node->cmdlist;
684 struct g2d_buf_info *buf_info = &node->buf_info;
689 for (i = 0; i < buf_info->map_nr; i++) {
690 struct g2d_buf_desc *buf_desc;
691 enum g2d_reg_type reg_type;
693 unsigned long handle;
696 reg_pos = cmdlist->last - 2 * (i + 1);
698 offset = cmdlist->data[reg_pos];
699 handle = cmdlist->data[reg_pos + 1];
701 reg_type = g2d_get_reg_type(offset);
702 if (reg_type == REG_TYPE_NONE) {
707 buf_desc = &buf_info->descs[reg_type];
709 if (buf_info->types[reg_type] == BUF_TYPE_GEM) {
712 size = exynos_drm_gem_get_size(drm_dev, handle, file);
718 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
724 addr = exynos_drm_gem_get_dma_addr(drm_dev, handle,
731 struct drm_exynos_g2d_userptr g2d_userptr;
733 if (copy_from_user(&g2d_userptr, (void __user *)handle,
734 sizeof(struct drm_exynos_g2d_userptr))) {
739 if (!g2d_check_buf_desc_is_valid(buf_desc, reg_type,
745 addr = g2d_userptr_get_dma_addr(drm_dev,
756 cmdlist->data[reg_pos + 1] = *addr;
757 buf_info->reg_types[i] = reg_type;
758 buf_info->handles[reg_type] = handle;
764 buf_info->map_nr = i;
768 static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
769 struct g2d_cmdlist_node *node,
770 struct drm_file *filp)
772 struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
773 struct g2d_buf_info *buf_info = &node->buf_info;
776 for (i = 0; i < buf_info->map_nr; i++) {
777 struct g2d_buf_desc *buf_desc;
778 enum g2d_reg_type reg_type;
779 unsigned long handle;
781 reg_type = buf_info->reg_types[i];
783 buf_desc = &buf_info->descs[reg_type];
784 handle = buf_info->handles[reg_type];
786 if (buf_info->types[reg_type] == BUF_TYPE_GEM)
787 exynos_drm_gem_put_dma_addr(subdrv->drm_dev, handle,
790 g2d_userptr_put_dma_addr(subdrv->drm_dev, handle,
793 buf_info->reg_types[i] = REG_TYPE_NONE;
794 buf_info->handles[reg_type] = 0;
795 buf_info->types[reg_type] = 0;
796 memset(buf_desc, 0x00, sizeof(*buf_desc));
799 buf_info->map_nr = 0;
802 static void g2d_dma_start(struct g2d_data *g2d,
803 struct g2d_runqueue_node *runqueue_node)
805 struct g2d_cmdlist_node *node =
806 list_first_entry(&runqueue_node->run_cmdlist,
807 struct g2d_cmdlist_node, list);
810 ret = pm_runtime_get_sync(g2d->dev);
812 dev_warn(g2d->dev, "failed pm power on.\n");
816 ret = clk_prepare_enable(g2d->gate_clk);
818 dev_warn(g2d->dev, "failed to enable clock.\n");
819 pm_runtime_put_sync(g2d->dev);
823 writel_relaxed(node->dma_addr, g2d->regs + G2D_DMA_SFR_BASE_ADDR);
824 writel_relaxed(G2D_DMA_START, g2d->regs + G2D_DMA_COMMAND);
827 static struct g2d_runqueue_node *g2d_get_runqueue_node(struct g2d_data *g2d)
829 struct g2d_runqueue_node *runqueue_node;
831 if (list_empty(&g2d->runqueue))
834 runqueue_node = list_first_entry(&g2d->runqueue,
835 struct g2d_runqueue_node, list);
836 list_del_init(&runqueue_node->list);
837 return runqueue_node;
840 static void g2d_free_runqueue_node(struct g2d_data *g2d,
841 struct g2d_runqueue_node *runqueue_node)
843 struct g2d_cmdlist_node *node;
848 mutex_lock(&g2d->cmdlist_mutex);
850 * commands in run_cmdlist have been completed so unmap all gem
851 * objects in each command node so that they are unreferenced.
853 list_for_each_entry(node, &runqueue_node->run_cmdlist, list)
854 g2d_unmap_cmdlist_gem(g2d, node, runqueue_node->filp);
855 list_splice_tail_init(&runqueue_node->run_cmdlist, &g2d->free_cmdlist);
856 mutex_unlock(&g2d->cmdlist_mutex);
858 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
861 static void g2d_exec_runqueue(struct g2d_data *g2d)
863 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
864 if (g2d->runqueue_node)
865 g2d_dma_start(g2d, g2d->runqueue_node);
868 static void g2d_runqueue_worker(struct work_struct *work)
870 struct g2d_data *g2d = container_of(work, struct g2d_data,
873 mutex_lock(&g2d->runqueue_mutex);
874 clk_disable_unprepare(g2d->gate_clk);
875 pm_runtime_put_sync(g2d->dev);
877 complete(&g2d->runqueue_node->complete);
878 if (g2d->runqueue_node->async)
879 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
882 g2d->runqueue_node = NULL;
884 g2d_exec_runqueue(g2d);
885 mutex_unlock(&g2d->runqueue_mutex);
888 static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
890 struct drm_device *drm_dev = g2d->subdrv.drm_dev;
891 struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
892 struct drm_exynos_pending_g2d_event *e;
896 if (list_empty(&runqueue_node->event_list))
899 e = list_first_entry(&runqueue_node->event_list,
900 struct drm_exynos_pending_g2d_event, base.link);
902 do_gettimeofday(&now);
903 e->event.tv_sec = now.tv_sec;
904 e->event.tv_usec = now.tv_usec;
905 e->event.cmdlist_no = cmdlist_no;
907 spin_lock_irqsave(&drm_dev->event_lock, flags);
908 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
909 wake_up_interruptible(&e->base.file_priv->event_wait);
910 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
913 static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
915 struct g2d_data *g2d = dev_id;
918 pending = readl_relaxed(g2d->regs + G2D_INTC_PEND);
920 writel_relaxed(pending, g2d->regs + G2D_INTC_PEND);
922 if (pending & G2D_INTP_GCMD_FIN) {
923 u32 cmdlist_no = readl_relaxed(g2d->regs + G2D_DMA_STATUS);
925 cmdlist_no = (cmdlist_no & G2D_DMA_LIST_DONE_COUNT) >>
926 G2D_DMA_LIST_DONE_COUNT_OFFSET;
928 g2d_finish_event(g2d, cmdlist_no);
930 writel_relaxed(0, g2d->regs + G2D_DMA_HOLD_CMD);
931 if (!(pending & G2D_INTP_ACMD_FIN)) {
932 writel_relaxed(G2D_DMA_CONTINUE,
933 g2d->regs + G2D_DMA_COMMAND);
937 if (pending & G2D_INTP_ACMD_FIN)
938 queue_work(g2d->g2d_workq, &g2d->runqueue_work);
943 static int g2d_check_reg_offset(struct device *dev,
944 struct g2d_cmdlist_node *node,
945 int nr, bool for_addr)
947 struct g2d_cmdlist *cmdlist = node->cmdlist;
952 for (i = 0; i < nr; i++) {
953 struct g2d_buf_info *buf_info = &node->buf_info;
954 struct g2d_buf_desc *buf_desc;
955 enum g2d_reg_type reg_type;
958 index = cmdlist->last - 2 * (i + 1);
960 reg_offset = cmdlist->data[index] & ~0xfffff000;
961 if (reg_offset < G2D_VALID_START || reg_offset > G2D_VALID_END)
966 switch (reg_offset) {
967 case G2D_SRC_BASE_ADDR:
968 case G2D_SRC_PLANE2_BASE_ADDR:
969 case G2D_DST_BASE_ADDR:
970 case G2D_DST_PLANE2_BASE_ADDR:
971 case G2D_PAT_BASE_ADDR:
972 case G2D_MSK_BASE_ADDR:
976 reg_type = g2d_get_reg_type(reg_offset);
977 if (reg_type == REG_TYPE_NONE)
980 /* check userptr buffer type. */
981 if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
982 buf_info->types[reg_type] = BUF_TYPE_USERPTR;
983 cmdlist->data[index] &= ~G2D_BUF_USERPTR;
985 buf_info->types[reg_type] = BUF_TYPE_GEM;
987 case G2D_SRC_COLOR_MODE:
988 case G2D_DST_COLOR_MODE:
992 reg_type = g2d_get_reg_type(reg_offset);
993 if (reg_type == REG_TYPE_NONE)
996 buf_desc = &buf_info->descs[reg_type];
997 value = cmdlist->data[index + 1];
999 buf_desc->format = value & 0xf;
1001 case G2D_SRC_LEFT_TOP:
1002 case G2D_DST_LEFT_TOP:
1006 reg_type = g2d_get_reg_type(reg_offset);
1007 if (reg_type == REG_TYPE_NONE)
1010 buf_desc = &buf_info->descs[reg_type];
1011 value = cmdlist->data[index + 1];
1013 buf_desc->left_x = value & 0x1fff;
1014 buf_desc->top_y = (value & 0x1fff0000) >> 16;
1016 case G2D_SRC_RIGHT_BOTTOM:
1017 case G2D_DST_RIGHT_BOTTOM:
1021 reg_type = g2d_get_reg_type(reg_offset);
1022 if (reg_type == REG_TYPE_NONE)
1025 buf_desc = &buf_info->descs[reg_type];
1026 value = cmdlist->data[index + 1];
1028 buf_desc->right_x = value & 0x1fff;
1029 buf_desc->bottom_y = (value & 0x1fff0000) >> 16;
1041 dev_err(dev, "Bad register offset: 0x%lx\n", cmdlist->data[index]);
1045 /* ioctl functions */
1046 int exynos_g2d_get_ver_ioctl(struct drm_device *drm_dev, void *data,
1047 struct drm_file *file)
1049 struct drm_exynos_g2d_get_ver *ver = data;
1051 ver->major = G2D_HW_MAJOR_VER;
1052 ver->minor = G2D_HW_MINOR_VER;
1056 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl);
1058 int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data,
1059 struct drm_file *file)
1061 struct drm_exynos_file_private *file_priv = file->driver_priv;
1062 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1063 struct device *dev = g2d_priv->dev;
1064 struct g2d_data *g2d;
1065 struct drm_exynos_g2d_set_cmdlist *req = data;
1066 struct drm_exynos_g2d_cmd *cmd;
1067 struct drm_exynos_pending_g2d_event *e;
1068 struct g2d_cmdlist_node *node;
1069 struct g2d_cmdlist *cmdlist;
1070 unsigned long flags;
1077 g2d = dev_get_drvdata(dev);
1081 node = g2d_get_cmdlist(g2d);
1087 if (req->event_type != G2D_EVENT_NOT) {
1088 spin_lock_irqsave(&drm_dev->event_lock, flags);
1089 if (file->event_space < sizeof(e->event)) {
1090 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1094 file->event_space -= sizeof(e->event);
1095 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1097 e = kzalloc(sizeof(*node->event), GFP_KERNEL);
1099 dev_err(dev, "failed to allocate event\n");
1101 spin_lock_irqsave(&drm_dev->event_lock, flags);
1102 file->event_space += sizeof(e->event);
1103 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1109 e->event.base.type = DRM_EXYNOS_G2D_EVENT;
1110 e->event.base.length = sizeof(e->event);
1111 e->event.user_data = req->user_data;
1112 e->base.event = &e->event.base;
1113 e->base.file_priv = file;
1114 e->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1119 cmdlist = node->cmdlist;
1124 * If don't clear SFR registers, the cmdlist is affected by register
1125 * values of previous cmdlist. G2D hw executes SFR clear command and
1126 * a next command at the same time then the next command is ignored and
1127 * is executed rightly from next next command, so needs a dummy command
1128 * to next command of SFR clear command.
1130 cmdlist->data[cmdlist->last++] = G2D_SOFT_RESET;
1131 cmdlist->data[cmdlist->last++] = G2D_SFRCLEAR;
1132 cmdlist->data[cmdlist->last++] = G2D_SRC_BASE_ADDR;
1133 cmdlist->data[cmdlist->last++] = 0;
1136 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1137 * and GCF bit should be set to INTEN register if user wants
1138 * G2D interrupt event once current command list execution is
1140 * Otherwise only ACF bit should be set to INTEN register so
1141 * that one interrupt is occured after all command lists
1142 * have been completed.
1145 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1146 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF | G2D_INTEN_GCF;
1147 cmdlist->data[cmdlist->last++] = G2D_DMA_HOLD_CMD;
1148 cmdlist->data[cmdlist->last++] = G2D_LIST_HOLD;
1150 cmdlist->data[cmdlist->last++] = G2D_INTEN;
1151 cmdlist->data[cmdlist->last++] = G2D_INTEN_ACF;
1154 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1155 size = cmdlist->last + req->cmd_nr * 2 + req->cmd_buf_nr * 2 + 2;
1156 if (size > G2D_CMDLIST_DATA_NUM) {
1157 dev_err(dev, "cmdlist size is too big\n");
1159 goto err_free_event;
1162 cmd = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd;
1164 if (copy_from_user(cmdlist->data + cmdlist->last,
1166 sizeof(*cmd) * req->cmd_nr)) {
1168 goto err_free_event;
1170 cmdlist->last += req->cmd_nr * 2;
1172 ret = g2d_check_reg_offset(dev, node, req->cmd_nr, false);
1174 goto err_free_event;
1176 node->buf_info.map_nr = req->cmd_buf_nr;
1177 if (req->cmd_buf_nr) {
1178 struct drm_exynos_g2d_cmd *cmd_buf;
1180 cmd_buf = (struct drm_exynos_g2d_cmd *)(uint32_t)req->cmd_buf;
1182 if (copy_from_user(cmdlist->data + cmdlist->last,
1183 (void __user *)cmd_buf,
1184 sizeof(*cmd_buf) * req->cmd_buf_nr)) {
1186 goto err_free_event;
1188 cmdlist->last += req->cmd_buf_nr * 2;
1190 ret = g2d_check_reg_offset(dev, node, req->cmd_buf_nr, true);
1192 goto err_free_event;
1194 ret = g2d_map_cmdlist_gem(g2d, node, drm_dev, file);
1199 cmdlist->data[cmdlist->last++] = G2D_BITBLT_START;
1200 cmdlist->data[cmdlist->last++] = G2D_START_BITBLT;
1203 cmdlist->head = cmdlist->last / 2;
1206 cmdlist->data[cmdlist->last] = 0;
1208 g2d_add_cmdlist_to_inuse(g2d_priv, node);
1213 g2d_unmap_cmdlist_gem(g2d, node, file);
1216 spin_lock_irqsave(&drm_dev->event_lock, flags);
1217 file->event_space += sizeof(e->event);
1218 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1222 g2d_put_cmdlist(g2d, node);
1225 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl);
1227 int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,
1228 struct drm_file *file)
1230 struct drm_exynos_file_private *file_priv = file->driver_priv;
1231 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1232 struct device *dev = g2d_priv->dev;
1233 struct g2d_data *g2d;
1234 struct drm_exynos_g2d_exec *req = data;
1235 struct g2d_runqueue_node *runqueue_node;
1236 struct list_head *run_cmdlist;
1237 struct list_head *event_list;
1242 g2d = dev_get_drvdata(dev);
1246 runqueue_node = kmem_cache_alloc(g2d->runqueue_slab, GFP_KERNEL);
1247 if (!runqueue_node) {
1248 dev_err(dev, "failed to allocate memory\n");
1251 run_cmdlist = &runqueue_node->run_cmdlist;
1252 event_list = &runqueue_node->event_list;
1253 INIT_LIST_HEAD(run_cmdlist);
1254 INIT_LIST_HEAD(event_list);
1255 init_completion(&runqueue_node->complete);
1256 runqueue_node->async = req->async;
1258 list_splice_init(&g2d_priv->inuse_cmdlist, run_cmdlist);
1259 list_splice_init(&g2d_priv->event_list, event_list);
1261 if (list_empty(run_cmdlist)) {
1262 dev_err(dev, "there is no inuse cmdlist\n");
1263 kmem_cache_free(g2d->runqueue_slab, runqueue_node);
1267 mutex_lock(&g2d->runqueue_mutex);
1268 runqueue_node->pid = current->pid;
1269 runqueue_node->filp = file;
1270 list_add_tail(&runqueue_node->list, &g2d->runqueue);
1271 if (!g2d->runqueue_node)
1272 g2d_exec_runqueue(g2d);
1273 mutex_unlock(&g2d->runqueue_mutex);
1275 if (runqueue_node->async)
1278 wait_for_completion(&runqueue_node->complete);
1279 g2d_free_runqueue_node(g2d, runqueue_node);
1284 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl);
1286 static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1288 struct g2d_data *g2d;
1291 g2d = dev_get_drvdata(dev);
1295 /* allocate dma-aware cmdlist buffer. */
1296 ret = g2d_init_cmdlist(g2d);
1298 dev_err(dev, "cmdlist init failed\n");
1302 if (!is_drm_iommu_supported(drm_dev))
1305 ret = drm_iommu_attach_device(drm_dev, dev);
1307 dev_err(dev, "failed to enable iommu.\n");
1308 g2d_fini_cmdlist(g2d);
1315 static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1317 if (!is_drm_iommu_supported(drm_dev))
1320 drm_iommu_detach_device(drm_dev, dev);
1323 static int g2d_open(struct drm_device *drm_dev, struct device *dev,
1324 struct drm_file *file)
1326 struct drm_exynos_file_private *file_priv = file->driver_priv;
1327 struct exynos_drm_g2d_private *g2d_priv;
1329 g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
1331 dev_err(dev, "failed to allocate g2d private data\n");
1335 g2d_priv->dev = dev;
1336 file_priv->g2d_priv = g2d_priv;
1338 INIT_LIST_HEAD(&g2d_priv->inuse_cmdlist);
1339 INIT_LIST_HEAD(&g2d_priv->event_list);
1340 INIT_LIST_HEAD(&g2d_priv->userptr_list);
1345 static void g2d_close(struct drm_device *drm_dev, struct device *dev,
1346 struct drm_file *file)
1348 struct drm_exynos_file_private *file_priv = file->driver_priv;
1349 struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv;
1350 struct g2d_data *g2d;
1351 struct g2d_cmdlist_node *node, *n;
1356 g2d = dev_get_drvdata(dev);
1360 mutex_lock(&g2d->cmdlist_mutex);
1361 list_for_each_entry_safe(node, n, &g2d_priv->inuse_cmdlist, list) {
1363 * unmap all gem objects not completed.
1365 * P.S. if current process was terminated forcely then
1366 * there may be some commands in inuse_cmdlist so unmap
1369 g2d_unmap_cmdlist_gem(g2d, node, file);
1370 list_move_tail(&node->list, &g2d->free_cmdlist);
1372 mutex_unlock(&g2d->cmdlist_mutex);
1374 /* release all g2d_userptr in pool. */
1375 g2d_userptr_free_all(drm_dev, g2d, file);
1377 kfree(file_priv->g2d_priv);
1380 static int g2d_probe(struct platform_device *pdev)
1382 struct device *dev = &pdev->dev;
1383 struct resource *res;
1384 struct g2d_data *g2d;
1385 struct exynos_drm_subdrv *subdrv;
1388 g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
1390 dev_err(dev, "failed to allocate driver data\n");
1394 g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
1395 sizeof(struct g2d_runqueue_node), 0, 0, NULL);
1396 if (!g2d->runqueue_slab)
1401 g2d->g2d_workq = create_singlethread_workqueue("g2d");
1402 if (!g2d->g2d_workq) {
1403 dev_err(dev, "failed to create workqueue\n");
1405 goto err_destroy_slab;
1408 INIT_WORK(&g2d->runqueue_work, g2d_runqueue_worker);
1409 INIT_LIST_HEAD(&g2d->free_cmdlist);
1410 INIT_LIST_HEAD(&g2d->runqueue);
1412 mutex_init(&g2d->cmdlist_mutex);
1413 mutex_init(&g2d->runqueue_mutex);
1415 g2d->gate_clk = devm_clk_get(dev, "fimg2d");
1416 if (IS_ERR(g2d->gate_clk)) {
1417 dev_err(dev, "failed to get gate clock\n");
1418 ret = PTR_ERR(g2d->gate_clk);
1419 goto err_destroy_workqueue;
1422 pm_runtime_enable(dev);
1424 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1426 g2d->regs = devm_ioremap_resource(dev, res);
1427 if (IS_ERR(g2d->regs)) {
1428 ret = PTR_ERR(g2d->regs);
1432 g2d->irq = platform_get_irq(pdev, 0);
1434 dev_err(dev, "failed to get irq\n");
1439 ret = devm_request_irq(dev, g2d->irq, g2d_irq_handler, 0,
1442 dev_err(dev, "irq request failed\n");
1446 g2d->max_pool = MAX_POOL;
1448 platform_set_drvdata(pdev, g2d);
1450 subdrv = &g2d->subdrv;
1452 subdrv->probe = g2d_subdrv_probe;
1453 subdrv->remove = g2d_subdrv_remove;
1454 subdrv->open = g2d_open;
1455 subdrv->close = g2d_close;
1457 ret = exynos_drm_subdrv_register(subdrv);
1459 dev_err(dev, "failed to register drm g2d device\n");
1463 dev_info(dev, "The exynos g2d(ver %d.%d) successfully probed\n",
1464 G2D_HW_MAJOR_VER, G2D_HW_MINOR_VER);
1469 pm_runtime_disable(dev);
1470 err_destroy_workqueue:
1471 destroy_workqueue(g2d->g2d_workq);
1473 kmem_cache_destroy(g2d->runqueue_slab);
1477 static int g2d_remove(struct platform_device *pdev)
1479 struct g2d_data *g2d = platform_get_drvdata(pdev);
1481 cancel_work_sync(&g2d->runqueue_work);
1482 exynos_drm_subdrv_unregister(&g2d->subdrv);
1484 while (g2d->runqueue_node) {
1485 g2d_free_runqueue_node(g2d, g2d->runqueue_node);
1486 g2d->runqueue_node = g2d_get_runqueue_node(g2d);
1489 pm_runtime_disable(&pdev->dev);
1491 g2d_fini_cmdlist(g2d);
1492 destroy_workqueue(g2d->g2d_workq);
1493 kmem_cache_destroy(g2d->runqueue_slab);
1498 #ifdef CONFIG_PM_SLEEP
1499 static int g2d_suspend(struct device *dev)
1501 struct g2d_data *g2d = dev_get_drvdata(dev);
1503 mutex_lock(&g2d->runqueue_mutex);
1504 g2d->suspended = true;
1505 mutex_unlock(&g2d->runqueue_mutex);
1507 while (g2d->runqueue_node)
1508 /* FIXME: good range? */
1509 usleep_range(500, 1000);
1511 flush_work(&g2d->runqueue_work);
1516 static int g2d_resume(struct device *dev)
1518 struct g2d_data *g2d = dev_get_drvdata(dev);
1520 g2d->suspended = false;
1521 g2d_exec_runqueue(g2d);
1527 static SIMPLE_DEV_PM_OPS(g2d_pm_ops, g2d_suspend, g2d_resume);
1530 static const struct of_device_id exynos_g2d_match[] = {
1531 { .compatible = "samsung,exynos5250-g2d" },
1536 struct platform_driver g2d_driver = {
1538 .remove = g2d_remove,
1541 .owner = THIS_MODULE,
1543 .of_match_table = of_match_ptr(exynos_g2d_match),