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_COLOR_MODE 0x030C
52 #define G2D_SRC_LEFT_TOP 0x0310
53 #define G2D_SRC_RIGHT_BOTTOM 0x0314
54 #define G2D_SRC_PLANE2_BASE_ADDR 0x0318
55 #define G2D_DST_BASE_ADDR 0x0404
56 #define G2D_DST_COLOR_MODE 0x040C
57 #define G2D_DST_LEFT_TOP 0x0410
58 #define G2D_DST_RIGHT_BOTTOM 0x0414
59 #define G2D_DST_PLANE2_BASE_ADDR 0x0418
60 #define G2D_PAT_BASE_ADDR 0x0500
61 #define G2D_MSK_BASE_ADDR 0x0520
64 #define G2D_SFRCLEAR (1 << 1)
65 #define G2D_R (1 << 0)
68 #define G2D_INTEN_ACF (1 << 3)
69 #define G2D_INTEN_UCF (1 << 2)
70 #define G2D_INTEN_GCF (1 << 1)
71 #define G2D_INTEN_SCF (1 << 0)
74 #define G2D_INTP_ACMD_FIN (1 << 3)
75 #define G2D_INTP_UCMD_FIN (1 << 2)
76 #define G2D_INTP_GCMD_FIN (1 << 1)
77 #define G2D_INTP_SCMD_FIN (1 << 0)
80 #define G2D_DMA_HALT (1 << 2)
81 #define G2D_DMA_CONTINUE (1 << 1)
82 #define G2D_DMA_START (1 << 0)
85 #define G2D_DMA_LIST_DONE_COUNT (0xFF << 17)
86 #define G2D_DMA_BITBLT_DONE_COUNT (0xFFFF << 1)
87 #define G2D_DMA_DONE (1 << 0)
88 #define G2D_DMA_LIST_DONE_COUNT_OFFSET 17
90 /* G2D_DMA_HOLD_CMD */
91 #define G2D_USER_HOLD (1 << 2)
92 #define G2D_LIST_HOLD (1 << 1)
93 #define G2D_BITBLT_HOLD (1 << 0)
95 /* G2D_BITBLT_START */
96 #define G2D_START_CASESEL (1 << 2)
97 #define G2D_START_NHOLT (1 << 1)
98 #define G2D_START_BITBLT (1 << 0)
100 /* buffer color format */
101 #define G2D_FMT_XRGB8888 0
102 #define G2D_FMT_ARGB8888 1
103 #define G2D_FMT_RGB565 2
104 #define G2D_FMT_XRGB1555 3
105 #define G2D_FMT_ARGB1555 4
106 #define G2D_FMT_XRGB4444 5
107 #define G2D_FMT_ARGB4444 6
108 #define G2D_FMT_PACKED_RGB888 7
109 #define G2D_FMT_A8 11
110 #define G2D_FMT_L8 12
112 /* buffer valid length */
113 #define G2D_LEN_MIN 1
114 #define G2D_LEN_MAX 8000
116 #define G2D_CMDLIST_SIZE (PAGE_SIZE / 4)
117 #define G2D_CMDLIST_NUM 64
118 #define G2D_CMDLIST_POOL_SIZE (G2D_CMDLIST_SIZE * G2D_CMDLIST_NUM)
119 #define G2D_CMDLIST_DATA_NUM (G2D_CMDLIST_SIZE / sizeof(u32) - 2)
121 /* maximum buffer pool size of userptr is 64MB as default */
122 #define MAX_POOL (64 * 1024 * 1024)
140 /* cmdlist data structure */
143 unsigned long data
[G2D_CMDLIST_DATA_NUM
];
144 u32 last
; /* last data offset */
148 * A structure of buffer description
150 * @format: color format
151 * @left_x: the x coordinates of left top corner
152 * @top_y: the y coordinates of left top corner
153 * @right_x: the x coordinates of right bottom corner
154 * @bottom_y: the y coordinates of right bottom corner
157 struct g2d_buf_desc
{
161 unsigned int right_x
;
162 unsigned int bottom_y
;
166 * A structure of buffer information
168 * @map_nr: manages the number of mapped buffers
169 * @reg_types: stores regitster type in the order of requested command
170 * @handles: stores buffer handle in its reg_type position
171 * @types: stores buffer type in its reg_type position
172 * @descs: stores buffer description in its reg_type position
175 struct g2d_buf_info
{
177 enum g2d_reg_type reg_types
[MAX_REG_TYPE_NR
];
178 unsigned long handles
[MAX_REG_TYPE_NR
];
179 unsigned int types
[MAX_REG_TYPE_NR
];
180 struct g2d_buf_desc descs
[MAX_REG_TYPE_NR
];
183 struct drm_exynos_pending_g2d_event
{
184 struct drm_pending_event base
;
185 struct drm_exynos_g2d_event event
;
188 struct g2d_cmdlist_userptr
{
189 struct list_head list
;
191 unsigned long userptr
;
195 struct sg_table
*sgt
;
196 struct vm_area_struct
*vma
;
201 struct g2d_cmdlist_node
{
202 struct list_head list
;
203 struct g2d_cmdlist
*cmdlist
;
205 struct g2d_buf_info buf_info
;
207 struct drm_exynos_pending_g2d_event
*event
;
210 struct g2d_runqueue_node
{
211 struct list_head list
;
212 struct list_head run_cmdlist
;
213 struct list_head event_list
;
214 struct drm_file
*filp
;
216 struct completion complete
;
222 struct clk
*gate_clk
;
225 struct workqueue_struct
*g2d_workq
;
226 struct work_struct runqueue_work
;
227 struct exynos_drm_subdrv subdrv
;
231 struct g2d_cmdlist_node
*cmdlist_node
;
232 struct list_head free_cmdlist
;
233 struct mutex cmdlist_mutex
;
234 dma_addr_t cmdlist_pool
;
235 void *cmdlist_pool_virt
;
236 struct dma_attrs cmdlist_dma_attrs
;
239 struct g2d_runqueue_node
*runqueue_node
;
240 struct list_head runqueue
;
241 struct mutex runqueue_mutex
;
242 struct kmem_cache
*runqueue_slab
;
244 unsigned long current_pool
;
245 unsigned long max_pool
;
248 static int g2d_init_cmdlist(struct g2d_data
*g2d
)
250 struct device
*dev
= g2d
->dev
;
251 struct g2d_cmdlist_node
*node
= g2d
->cmdlist_node
;
252 struct exynos_drm_subdrv
*subdrv
= &g2d
->subdrv
;
255 struct g2d_buf_info
*buf_info
;
257 init_dma_attrs(&g2d
->cmdlist_dma_attrs
);
258 dma_set_attr(DMA_ATTR_WRITE_COMBINE
, &g2d
->cmdlist_dma_attrs
);
260 g2d
->cmdlist_pool_virt
= dma_alloc_attrs(subdrv
->drm_dev
->dev
,
261 G2D_CMDLIST_POOL_SIZE
,
262 &g2d
->cmdlist_pool
, GFP_KERNEL
,
263 &g2d
->cmdlist_dma_attrs
);
264 if (!g2d
->cmdlist_pool_virt
) {
265 dev_err(dev
, "failed to allocate dma memory\n");
269 node
= kcalloc(G2D_CMDLIST_NUM
, sizeof(*node
), GFP_KERNEL
);
271 dev_err(dev
, "failed to allocate memory\n");
276 for (nr
= 0; nr
< G2D_CMDLIST_NUM
; nr
++) {
280 g2d
->cmdlist_pool_virt
+ nr
* G2D_CMDLIST_SIZE
;
282 g2d
->cmdlist_pool
+ nr
* G2D_CMDLIST_SIZE
;
284 buf_info
= &node
[nr
].buf_info
;
285 for (i
= 0; i
< MAX_REG_TYPE_NR
; i
++)
286 buf_info
->reg_types
[i
] = REG_TYPE_NONE
;
288 list_add_tail(&node
[nr
].list
, &g2d
->free_cmdlist
);
294 dma_free_attrs(subdrv
->drm_dev
->dev
, G2D_CMDLIST_POOL_SIZE
,
295 g2d
->cmdlist_pool_virt
,
296 g2d
->cmdlist_pool
, &g2d
->cmdlist_dma_attrs
);
300 static void g2d_fini_cmdlist(struct g2d_data
*g2d
)
302 struct exynos_drm_subdrv
*subdrv
= &g2d
->subdrv
;
304 kfree(g2d
->cmdlist_node
);
305 dma_free_attrs(subdrv
->drm_dev
->dev
, G2D_CMDLIST_POOL_SIZE
,
306 g2d
->cmdlist_pool_virt
,
307 g2d
->cmdlist_pool
, &g2d
->cmdlist_dma_attrs
);
310 static struct g2d_cmdlist_node
*g2d_get_cmdlist(struct g2d_data
*g2d
)
312 struct device
*dev
= g2d
->dev
;
313 struct g2d_cmdlist_node
*node
;
315 mutex_lock(&g2d
->cmdlist_mutex
);
316 if (list_empty(&g2d
->free_cmdlist
)) {
317 dev_err(dev
, "there is no free cmdlist\n");
318 mutex_unlock(&g2d
->cmdlist_mutex
);
322 node
= list_first_entry(&g2d
->free_cmdlist
, struct g2d_cmdlist_node
,
324 list_del_init(&node
->list
);
325 mutex_unlock(&g2d
->cmdlist_mutex
);
330 static void g2d_put_cmdlist(struct g2d_data
*g2d
, struct g2d_cmdlist_node
*node
)
332 mutex_lock(&g2d
->cmdlist_mutex
);
333 list_move_tail(&node
->list
, &g2d
->free_cmdlist
);
334 mutex_unlock(&g2d
->cmdlist_mutex
);
337 static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private
*g2d_priv
,
338 struct g2d_cmdlist_node
*node
)
340 struct g2d_cmdlist_node
*lnode
;
342 if (list_empty(&g2d_priv
->inuse_cmdlist
))
345 /* this links to base address of new cmdlist */
346 lnode
= list_entry(g2d_priv
->inuse_cmdlist
.prev
,
347 struct g2d_cmdlist_node
, list
);
348 lnode
->cmdlist
->data
[lnode
->cmdlist
->last
] = node
->dma_addr
;
351 list_add_tail(&node
->list
, &g2d_priv
->inuse_cmdlist
);
354 list_add_tail(&node
->event
->base
.link
, &g2d_priv
->event_list
);
357 static void g2d_userptr_put_dma_addr(struct drm_device
*drm_dev
,
361 struct g2d_cmdlist_userptr
*g2d_userptr
=
362 (struct g2d_cmdlist_userptr
*)obj
;
370 atomic_dec(&g2d_userptr
->refcount
);
372 if (atomic_read(&g2d_userptr
->refcount
) > 0)
375 if (g2d_userptr
->in_pool
)
379 exynos_gem_unmap_sgt_from_dma(drm_dev
, g2d_userptr
->sgt
,
382 exynos_gem_put_pages_to_userptr(g2d_userptr
->pages
,
386 if (!g2d_userptr
->out_of_list
)
387 list_del_init(&g2d_userptr
->list
);
389 sg_free_table(g2d_userptr
->sgt
);
390 kfree(g2d_userptr
->sgt
);
392 drm_free_large(g2d_userptr
->pages
);
396 static dma_addr_t
*g2d_userptr_get_dma_addr(struct drm_device
*drm_dev
,
397 unsigned long userptr
,
399 struct drm_file
*filp
,
402 struct drm_exynos_file_private
*file_priv
= filp
->driver_priv
;
403 struct exynos_drm_g2d_private
*g2d_priv
= file_priv
->g2d_priv
;
404 struct g2d_cmdlist_userptr
*g2d_userptr
;
405 struct g2d_data
*g2d
;
407 struct sg_table
*sgt
;
408 struct vm_area_struct
*vma
;
409 unsigned long start
, end
;
410 unsigned int npages
, offset
;
414 DRM_ERROR("invalid userptr size.\n");
415 return ERR_PTR(-EINVAL
);
418 g2d
= dev_get_drvdata(g2d_priv
->dev
);
420 /* check if userptr already exists in userptr_list. */
421 list_for_each_entry(g2d_userptr
, &g2d_priv
->userptr_list
, list
) {
422 if (g2d_userptr
->userptr
== userptr
) {
424 * also check size because there could be same address
425 * and different size.
427 if (g2d_userptr
->size
== size
) {
428 atomic_inc(&g2d_userptr
->refcount
);
429 *obj
= (unsigned long)g2d_userptr
;
431 return &g2d_userptr
->dma_addr
;
435 * at this moment, maybe g2d dma is accessing this
436 * g2d_userptr memory region so just remove this
437 * g2d_userptr object from userptr_list not to be
438 * referred again and also except it the userptr
439 * pool to be released after the dma access completion.
441 g2d_userptr
->out_of_list
= true;
442 g2d_userptr
->in_pool
= false;
443 list_del_init(&g2d_userptr
->list
);
449 g2d_userptr
= kzalloc(sizeof(*g2d_userptr
), GFP_KERNEL
);
451 DRM_ERROR("failed to allocate g2d_userptr.\n");
452 return ERR_PTR(-ENOMEM
);
455 atomic_set(&g2d_userptr
->refcount
, 1);
457 start
= userptr
& PAGE_MASK
;
458 offset
= userptr
& ~PAGE_MASK
;
459 end
= PAGE_ALIGN(userptr
+ size
);
460 npages
= (end
- start
) >> PAGE_SHIFT
;
461 g2d_userptr
->npages
= npages
;
463 pages
= drm_calloc_large(npages
, sizeof(struct page
*));
465 DRM_ERROR("failed to allocate pages.\n");
470 vma
= find_vma(current
->mm
, userptr
);
472 DRM_ERROR("failed to get vm region.\n");
477 if (vma
->vm_end
< userptr
+ size
) {
478 DRM_ERROR("vma is too small.\n");
483 g2d_userptr
->vma
= exynos_gem_get_vma(vma
);
484 if (!g2d_userptr
->vma
) {
485 DRM_ERROR("failed to copy vma.\n");
490 g2d_userptr
->size
= size
;
492 ret
= exynos_gem_get_pages_from_userptr(start
& PAGE_MASK
,
495 DRM_ERROR("failed to get user pages from userptr.\n");
499 g2d_userptr
->pages
= pages
;
501 sgt
= kzalloc(sizeof(*sgt
), GFP_KERNEL
);
503 DRM_ERROR("failed to allocate sg table.\n");
505 goto err_free_userptr
;
508 ret
= sg_alloc_table_from_pages(sgt
, pages
, npages
, offset
,
511 DRM_ERROR("failed to get sgt from pages.\n");
515 g2d_userptr
->sgt
= sgt
;
517 ret
= exynos_gem_map_sgt_with_dma(drm_dev
, g2d_userptr
->sgt
,
520 DRM_ERROR("failed to map sgt with dma region.\n");
521 goto err_sg_free_table
;
524 g2d_userptr
->dma_addr
= sgt
->sgl
[0].dma_address
;
525 g2d_userptr
->userptr
= userptr
;
527 list_add_tail(&g2d_userptr
->list
, &g2d_priv
->userptr_list
);
529 if (g2d
->current_pool
+ (npages
<< PAGE_SHIFT
) < g2d
->max_pool
) {
530 g2d
->current_pool
+= npages
<< PAGE_SHIFT
;
531 g2d_userptr
->in_pool
= true;
534 *obj
= (unsigned long)g2d_userptr
;
536 return &g2d_userptr
->dma_addr
;
545 exynos_gem_put_pages_to_userptr(g2d_userptr
->pages
,
550 exynos_gem_put_vma(g2d_userptr
->vma
);
553 drm_free_large(pages
);
561 static void g2d_userptr_free_all(struct drm_device
*drm_dev
,
562 struct g2d_data
*g2d
,
563 struct drm_file
*filp
)
565 struct drm_exynos_file_private
*file_priv
= filp
->driver_priv
;
566 struct exynos_drm_g2d_private
*g2d_priv
= file_priv
->g2d_priv
;
567 struct g2d_cmdlist_userptr
*g2d_userptr
, *n
;
569 list_for_each_entry_safe(g2d_userptr
, n
, &g2d_priv
->userptr_list
, list
)
570 if (g2d_userptr
->in_pool
)
571 g2d_userptr_put_dma_addr(drm_dev
,
572 (unsigned long)g2d_userptr
,
575 g2d
->current_pool
= 0;
578 static enum g2d_reg_type
g2d_get_reg_type(int reg_offset
)
580 enum g2d_reg_type reg_type
;
582 switch (reg_offset
) {
583 case G2D_SRC_BASE_ADDR
:
584 case G2D_SRC_COLOR_MODE
:
585 case G2D_SRC_LEFT_TOP
:
586 case G2D_SRC_RIGHT_BOTTOM
:
587 reg_type
= REG_TYPE_SRC
;
589 case G2D_SRC_PLANE2_BASE_ADDR
:
590 reg_type
= REG_TYPE_SRC_PLANE2
;
592 case G2D_DST_BASE_ADDR
:
593 case G2D_DST_COLOR_MODE
:
594 case G2D_DST_LEFT_TOP
:
595 case G2D_DST_RIGHT_BOTTOM
:
596 reg_type
= REG_TYPE_DST
;
598 case G2D_DST_PLANE2_BASE_ADDR
:
599 reg_type
= REG_TYPE_DST_PLANE2
;
601 case G2D_PAT_BASE_ADDR
:
602 reg_type
= REG_TYPE_PAT
;
604 case G2D_MSK_BASE_ADDR
:
605 reg_type
= REG_TYPE_MSK
;
608 reg_type
= REG_TYPE_NONE
;
609 DRM_ERROR("Unknown register offset![%d]\n", reg_offset
);
616 static unsigned long g2d_get_buf_bpp(unsigned int format
)
621 case G2D_FMT_XRGB8888
:
622 case G2D_FMT_ARGB8888
:
626 case G2D_FMT_XRGB1555
:
627 case G2D_FMT_ARGB1555
:
628 case G2D_FMT_XRGB4444
:
629 case G2D_FMT_ARGB4444
:
632 case G2D_FMT_PACKED_RGB888
:
643 static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc
*buf_desc
,
644 enum g2d_reg_type reg_type
,
647 unsigned int width
, height
;
651 * check source and destination buffers only.
652 * so the others are always valid.
654 if (reg_type
!= REG_TYPE_SRC
&& reg_type
!= REG_TYPE_DST
)
657 width
= buf_desc
->right_x
- buf_desc
->left_x
;
658 if (width
< G2D_LEN_MIN
|| width
> G2D_LEN_MAX
) {
659 DRM_ERROR("width[%u] is out of range!\n", width
);
663 height
= buf_desc
->bottom_y
- buf_desc
->top_y
;
664 if (height
< G2D_LEN_MIN
|| height
> G2D_LEN_MAX
) {
665 DRM_ERROR("height[%u] is out of range!\n", height
);
669 area
= (unsigned long)width
* (unsigned long)height
*
670 g2d_get_buf_bpp(buf_desc
->format
);
672 DRM_ERROR("area[%lu] is out of range[%lu]!\n", area
, size
);
679 static int g2d_map_cmdlist_gem(struct g2d_data
*g2d
,
680 struct g2d_cmdlist_node
*node
,
681 struct drm_device
*drm_dev
,
682 struct drm_file
*file
)
684 struct g2d_cmdlist
*cmdlist
= node
->cmdlist
;
685 struct g2d_buf_info
*buf_info
= &node
->buf_info
;
690 for (i
= 0; i
< buf_info
->map_nr
; i
++) {
691 struct g2d_buf_desc
*buf_desc
;
692 enum g2d_reg_type reg_type
;
694 unsigned long handle
;
697 reg_pos
= cmdlist
->last
- 2 * (i
+ 1);
699 offset
= cmdlist
->data
[reg_pos
];
700 handle
= cmdlist
->data
[reg_pos
+ 1];
702 reg_type
= g2d_get_reg_type(offset
);
703 if (reg_type
== REG_TYPE_NONE
) {
708 buf_desc
= &buf_info
->descs
[reg_type
];
710 if (buf_info
->types
[reg_type
] == BUF_TYPE_GEM
) {
713 size
= exynos_drm_gem_get_size(drm_dev
, handle
, file
);
719 if (!g2d_check_buf_desc_is_valid(buf_desc
, reg_type
,
725 addr
= exynos_drm_gem_get_dma_addr(drm_dev
, handle
,
732 struct drm_exynos_g2d_userptr g2d_userptr
;
734 if (copy_from_user(&g2d_userptr
, (void __user
*)handle
,
735 sizeof(struct drm_exynos_g2d_userptr
))) {
740 if (!g2d_check_buf_desc_is_valid(buf_desc
, reg_type
,
746 addr
= g2d_userptr_get_dma_addr(drm_dev
,
757 cmdlist
->data
[reg_pos
+ 1] = *addr
;
758 buf_info
->reg_types
[i
] = reg_type
;
759 buf_info
->handles
[reg_type
] = handle
;
765 buf_info
->map_nr
= i
;
769 static void g2d_unmap_cmdlist_gem(struct g2d_data
*g2d
,
770 struct g2d_cmdlist_node
*node
,
771 struct drm_file
*filp
)
773 struct exynos_drm_subdrv
*subdrv
= &g2d
->subdrv
;
774 struct g2d_buf_info
*buf_info
= &node
->buf_info
;
777 for (i
= 0; i
< buf_info
->map_nr
; i
++) {
778 struct g2d_buf_desc
*buf_desc
;
779 enum g2d_reg_type reg_type
;
780 unsigned long handle
;
782 reg_type
= buf_info
->reg_types
[i
];
784 buf_desc
= &buf_info
->descs
[reg_type
];
785 handle
= buf_info
->handles
[reg_type
];
787 if (buf_info
->types
[reg_type
] == BUF_TYPE_GEM
)
788 exynos_drm_gem_put_dma_addr(subdrv
->drm_dev
, handle
,
791 g2d_userptr_put_dma_addr(subdrv
->drm_dev
, handle
,
794 buf_info
->reg_types
[i
] = REG_TYPE_NONE
;
795 buf_info
->handles
[reg_type
] = 0;
796 buf_info
->types
[reg_type
] = 0;
797 memset(buf_desc
, 0x00, sizeof(*buf_desc
));
800 buf_info
->map_nr
= 0;
803 static void g2d_dma_start(struct g2d_data
*g2d
,
804 struct g2d_runqueue_node
*runqueue_node
)
806 struct g2d_cmdlist_node
*node
=
807 list_first_entry(&runqueue_node
->run_cmdlist
,
808 struct g2d_cmdlist_node
, list
);
810 pm_runtime_get_sync(g2d
->dev
);
811 clk_enable(g2d
->gate_clk
);
813 writel_relaxed(node
->dma_addr
, g2d
->regs
+ G2D_DMA_SFR_BASE_ADDR
);
814 writel_relaxed(G2D_DMA_START
, g2d
->regs
+ G2D_DMA_COMMAND
);
817 static struct g2d_runqueue_node
*g2d_get_runqueue_node(struct g2d_data
*g2d
)
819 struct g2d_runqueue_node
*runqueue_node
;
821 if (list_empty(&g2d
->runqueue
))
824 runqueue_node
= list_first_entry(&g2d
->runqueue
,
825 struct g2d_runqueue_node
, list
);
826 list_del_init(&runqueue_node
->list
);
827 return runqueue_node
;
830 static void g2d_free_runqueue_node(struct g2d_data
*g2d
,
831 struct g2d_runqueue_node
*runqueue_node
)
833 struct g2d_cmdlist_node
*node
;
838 mutex_lock(&g2d
->cmdlist_mutex
);
840 * commands in run_cmdlist have been completed so unmap all gem
841 * objects in each command node so that they are unreferenced.
843 list_for_each_entry(node
, &runqueue_node
->run_cmdlist
, list
)
844 g2d_unmap_cmdlist_gem(g2d
, node
, runqueue_node
->filp
);
845 list_splice_tail_init(&runqueue_node
->run_cmdlist
, &g2d
->free_cmdlist
);
846 mutex_unlock(&g2d
->cmdlist_mutex
);
848 kmem_cache_free(g2d
->runqueue_slab
, runqueue_node
);
851 static void g2d_exec_runqueue(struct g2d_data
*g2d
)
853 g2d
->runqueue_node
= g2d_get_runqueue_node(g2d
);
854 if (g2d
->runqueue_node
)
855 g2d_dma_start(g2d
, g2d
->runqueue_node
);
858 static void g2d_runqueue_worker(struct work_struct
*work
)
860 struct g2d_data
*g2d
= container_of(work
, struct g2d_data
,
863 mutex_lock(&g2d
->runqueue_mutex
);
864 clk_disable(g2d
->gate_clk
);
865 pm_runtime_put_sync(g2d
->dev
);
867 complete(&g2d
->runqueue_node
->complete
);
868 if (g2d
->runqueue_node
->async
)
869 g2d_free_runqueue_node(g2d
, g2d
->runqueue_node
);
872 g2d
->runqueue_node
= NULL
;
874 g2d_exec_runqueue(g2d
);
875 mutex_unlock(&g2d
->runqueue_mutex
);
878 static void g2d_finish_event(struct g2d_data
*g2d
, u32 cmdlist_no
)
880 struct drm_device
*drm_dev
= g2d
->subdrv
.drm_dev
;
881 struct g2d_runqueue_node
*runqueue_node
= g2d
->runqueue_node
;
882 struct drm_exynos_pending_g2d_event
*e
;
886 if (list_empty(&runqueue_node
->event_list
))
889 e
= list_first_entry(&runqueue_node
->event_list
,
890 struct drm_exynos_pending_g2d_event
, base
.link
);
892 do_gettimeofday(&now
);
893 e
->event
.tv_sec
= now
.tv_sec
;
894 e
->event
.tv_usec
= now
.tv_usec
;
895 e
->event
.cmdlist_no
= cmdlist_no
;
897 spin_lock_irqsave(&drm_dev
->event_lock
, flags
);
898 list_move_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
899 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
900 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
903 static irqreturn_t
g2d_irq_handler(int irq
, void *dev_id
)
905 struct g2d_data
*g2d
= dev_id
;
908 pending
= readl_relaxed(g2d
->regs
+ G2D_INTC_PEND
);
910 writel_relaxed(pending
, g2d
->regs
+ G2D_INTC_PEND
);
912 if (pending
& G2D_INTP_GCMD_FIN
) {
913 u32 cmdlist_no
= readl_relaxed(g2d
->regs
+ G2D_DMA_STATUS
);
915 cmdlist_no
= (cmdlist_no
& G2D_DMA_LIST_DONE_COUNT
) >>
916 G2D_DMA_LIST_DONE_COUNT_OFFSET
;
918 g2d_finish_event(g2d
, cmdlist_no
);
920 writel_relaxed(0, g2d
->regs
+ G2D_DMA_HOLD_CMD
);
921 if (!(pending
& G2D_INTP_ACMD_FIN
)) {
922 writel_relaxed(G2D_DMA_CONTINUE
,
923 g2d
->regs
+ G2D_DMA_COMMAND
);
927 if (pending
& G2D_INTP_ACMD_FIN
)
928 queue_work(g2d
->g2d_workq
, &g2d
->runqueue_work
);
933 static int g2d_check_reg_offset(struct device
*dev
,
934 struct g2d_cmdlist_node
*node
,
935 int nr
, bool for_addr
)
937 struct g2d_cmdlist
*cmdlist
= node
->cmdlist
;
942 for (i
= 0; i
< nr
; i
++) {
943 struct g2d_buf_info
*buf_info
= &node
->buf_info
;
944 struct g2d_buf_desc
*buf_desc
;
945 enum g2d_reg_type reg_type
;
948 index
= cmdlist
->last
- 2 * (i
+ 1);
950 reg_offset
= cmdlist
->data
[index
] & ~0xfffff000;
951 if (reg_offset
< G2D_VALID_START
|| reg_offset
> G2D_VALID_END
)
956 switch (reg_offset
) {
957 case G2D_SRC_BASE_ADDR
:
958 case G2D_SRC_PLANE2_BASE_ADDR
:
959 case G2D_DST_BASE_ADDR
:
960 case G2D_DST_PLANE2_BASE_ADDR
:
961 case G2D_PAT_BASE_ADDR
:
962 case G2D_MSK_BASE_ADDR
:
966 reg_type
= g2d_get_reg_type(reg_offset
);
967 if (reg_type
== REG_TYPE_NONE
)
970 /* check userptr buffer type. */
971 if ((cmdlist
->data
[index
] & ~0x7fffffff) >> 31) {
972 buf_info
->types
[reg_type
] = BUF_TYPE_USERPTR
;
973 cmdlist
->data
[index
] &= ~G2D_BUF_USERPTR
;
975 buf_info
->types
[reg_type
] = BUF_TYPE_GEM
;
977 case G2D_SRC_COLOR_MODE
:
978 case G2D_DST_COLOR_MODE
:
982 reg_type
= g2d_get_reg_type(reg_offset
);
983 if (reg_type
== REG_TYPE_NONE
)
986 buf_desc
= &buf_info
->descs
[reg_type
];
987 value
= cmdlist
->data
[index
+ 1];
989 buf_desc
->format
= value
& 0xf;
991 case G2D_SRC_LEFT_TOP
:
992 case G2D_DST_LEFT_TOP
:
996 reg_type
= g2d_get_reg_type(reg_offset
);
997 if (reg_type
== REG_TYPE_NONE
)
1000 buf_desc
= &buf_info
->descs
[reg_type
];
1001 value
= cmdlist
->data
[index
+ 1];
1003 buf_desc
->left_x
= value
& 0x1fff;
1004 buf_desc
->top_y
= (value
& 0x1fff0000) >> 16;
1006 case G2D_SRC_RIGHT_BOTTOM
:
1007 case G2D_DST_RIGHT_BOTTOM
:
1011 reg_type
= g2d_get_reg_type(reg_offset
);
1012 if (reg_type
== REG_TYPE_NONE
)
1015 buf_desc
= &buf_info
->descs
[reg_type
];
1016 value
= cmdlist
->data
[index
+ 1];
1018 buf_desc
->right_x
= value
& 0x1fff;
1019 buf_desc
->bottom_y
= (value
& 0x1fff0000) >> 16;
1031 dev_err(dev
, "Bad register offset: 0x%lx\n", cmdlist
->data
[index
]);
1035 /* ioctl functions */
1036 int exynos_g2d_get_ver_ioctl(struct drm_device
*drm_dev
, void *data
,
1037 struct drm_file
*file
)
1039 struct drm_exynos_g2d_get_ver
*ver
= data
;
1041 ver
->major
= G2D_HW_MAJOR_VER
;
1042 ver
->minor
= G2D_HW_MINOR_VER
;
1046 EXPORT_SYMBOL_GPL(exynos_g2d_get_ver_ioctl
);
1048 int exynos_g2d_set_cmdlist_ioctl(struct drm_device
*drm_dev
, void *data
,
1049 struct drm_file
*file
)
1051 struct drm_exynos_file_private
*file_priv
= file
->driver_priv
;
1052 struct exynos_drm_g2d_private
*g2d_priv
= file_priv
->g2d_priv
;
1053 struct device
*dev
= g2d_priv
->dev
;
1054 struct g2d_data
*g2d
;
1055 struct drm_exynos_g2d_set_cmdlist
*req
= data
;
1056 struct drm_exynos_g2d_cmd
*cmd
;
1057 struct drm_exynos_pending_g2d_event
*e
;
1058 struct g2d_cmdlist_node
*node
;
1059 struct g2d_cmdlist
*cmdlist
;
1060 unsigned long flags
;
1067 g2d
= dev_get_drvdata(dev
);
1071 node
= g2d_get_cmdlist(g2d
);
1077 if (req
->event_type
!= G2D_EVENT_NOT
) {
1078 spin_lock_irqsave(&drm_dev
->event_lock
, flags
);
1079 if (file
->event_space
< sizeof(e
->event
)) {
1080 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
1084 file
->event_space
-= sizeof(e
->event
);
1085 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
1087 e
= kzalloc(sizeof(*node
->event
), GFP_KERNEL
);
1089 dev_err(dev
, "failed to allocate event\n");
1091 spin_lock_irqsave(&drm_dev
->event_lock
, flags
);
1092 file
->event_space
+= sizeof(e
->event
);
1093 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
1099 e
->event
.base
.type
= DRM_EXYNOS_G2D_EVENT
;
1100 e
->event
.base
.length
= sizeof(e
->event
);
1101 e
->event
.user_data
= req
->user_data
;
1102 e
->base
.event
= &e
->event
.base
;
1103 e
->base
.file_priv
= file
;
1104 e
->base
.destroy
= (void (*) (struct drm_pending_event
*)) kfree
;
1109 cmdlist
= node
->cmdlist
;
1114 * If don't clear SFR registers, the cmdlist is affected by register
1115 * values of previous cmdlist. G2D hw executes SFR clear command and
1116 * a next command at the same time then the next command is ignored and
1117 * is executed rightly from next next command, so needs a dummy command
1118 * to next command of SFR clear command.
1120 cmdlist
->data
[cmdlist
->last
++] = G2D_SOFT_RESET
;
1121 cmdlist
->data
[cmdlist
->last
++] = G2D_SFRCLEAR
;
1122 cmdlist
->data
[cmdlist
->last
++] = G2D_SRC_BASE_ADDR
;
1123 cmdlist
->data
[cmdlist
->last
++] = 0;
1126 * 'LIST_HOLD' command should be set to the DMA_HOLD_CMD_REG
1127 * and GCF bit should be set to INTEN register if user wants
1128 * G2D interrupt event once current command list execution is
1130 * Otherwise only ACF bit should be set to INTEN register so
1131 * that one interrupt is occured after all command lists
1132 * have been completed.
1135 cmdlist
->data
[cmdlist
->last
++] = G2D_INTEN
;
1136 cmdlist
->data
[cmdlist
->last
++] = G2D_INTEN_ACF
| G2D_INTEN_GCF
;
1137 cmdlist
->data
[cmdlist
->last
++] = G2D_DMA_HOLD_CMD
;
1138 cmdlist
->data
[cmdlist
->last
++] = G2D_LIST_HOLD
;
1140 cmdlist
->data
[cmdlist
->last
++] = G2D_INTEN
;
1141 cmdlist
->data
[cmdlist
->last
++] = G2D_INTEN_ACF
;
1144 /* Check size of cmdlist: last 2 is about G2D_BITBLT_START */
1145 size
= cmdlist
->last
+ req
->cmd_nr
* 2 + req
->cmd_buf_nr
* 2 + 2;
1146 if (size
> G2D_CMDLIST_DATA_NUM
) {
1147 dev_err(dev
, "cmdlist size is too big\n");
1149 goto err_free_event
;
1152 cmd
= (struct drm_exynos_g2d_cmd
*)(uint32_t)req
->cmd
;
1154 if (copy_from_user(cmdlist
->data
+ cmdlist
->last
,
1156 sizeof(*cmd
) * req
->cmd_nr
)) {
1158 goto err_free_event
;
1160 cmdlist
->last
+= req
->cmd_nr
* 2;
1162 ret
= g2d_check_reg_offset(dev
, node
, req
->cmd_nr
, false);
1164 goto err_free_event
;
1166 node
->buf_info
.map_nr
= req
->cmd_buf_nr
;
1167 if (req
->cmd_buf_nr
) {
1168 struct drm_exynos_g2d_cmd
*cmd_buf
;
1170 cmd_buf
= (struct drm_exynos_g2d_cmd
*)(uint32_t)req
->cmd_buf
;
1172 if (copy_from_user(cmdlist
->data
+ cmdlist
->last
,
1173 (void __user
*)cmd_buf
,
1174 sizeof(*cmd_buf
) * req
->cmd_buf_nr
)) {
1176 goto err_free_event
;
1178 cmdlist
->last
+= req
->cmd_buf_nr
* 2;
1180 ret
= g2d_check_reg_offset(dev
, node
, req
->cmd_buf_nr
, true);
1182 goto err_free_event
;
1184 ret
= g2d_map_cmdlist_gem(g2d
, node
, drm_dev
, file
);
1189 cmdlist
->data
[cmdlist
->last
++] = G2D_BITBLT_START
;
1190 cmdlist
->data
[cmdlist
->last
++] = G2D_START_BITBLT
;
1193 cmdlist
->head
= cmdlist
->last
/ 2;
1196 cmdlist
->data
[cmdlist
->last
] = 0;
1198 g2d_add_cmdlist_to_inuse(g2d_priv
, node
);
1203 g2d_unmap_cmdlist_gem(g2d
, node
, file
);
1206 spin_lock_irqsave(&drm_dev
->event_lock
, flags
);
1207 file
->event_space
+= sizeof(e
->event
);
1208 spin_unlock_irqrestore(&drm_dev
->event_lock
, flags
);
1212 g2d_put_cmdlist(g2d
, node
);
1215 EXPORT_SYMBOL_GPL(exynos_g2d_set_cmdlist_ioctl
);
1217 int exynos_g2d_exec_ioctl(struct drm_device
*drm_dev
, void *data
,
1218 struct drm_file
*file
)
1220 struct drm_exynos_file_private
*file_priv
= file
->driver_priv
;
1221 struct exynos_drm_g2d_private
*g2d_priv
= file_priv
->g2d_priv
;
1222 struct device
*dev
= g2d_priv
->dev
;
1223 struct g2d_data
*g2d
;
1224 struct drm_exynos_g2d_exec
*req
= data
;
1225 struct g2d_runqueue_node
*runqueue_node
;
1226 struct list_head
*run_cmdlist
;
1227 struct list_head
*event_list
;
1232 g2d
= dev_get_drvdata(dev
);
1236 runqueue_node
= kmem_cache_alloc(g2d
->runqueue_slab
, GFP_KERNEL
);
1237 if (!runqueue_node
) {
1238 dev_err(dev
, "failed to allocate memory\n");
1241 run_cmdlist
= &runqueue_node
->run_cmdlist
;
1242 event_list
= &runqueue_node
->event_list
;
1243 INIT_LIST_HEAD(run_cmdlist
);
1244 INIT_LIST_HEAD(event_list
);
1245 init_completion(&runqueue_node
->complete
);
1246 runqueue_node
->async
= req
->async
;
1248 list_splice_init(&g2d_priv
->inuse_cmdlist
, run_cmdlist
);
1249 list_splice_init(&g2d_priv
->event_list
, event_list
);
1251 if (list_empty(run_cmdlist
)) {
1252 dev_err(dev
, "there is no inuse cmdlist\n");
1253 kmem_cache_free(g2d
->runqueue_slab
, runqueue_node
);
1257 mutex_lock(&g2d
->runqueue_mutex
);
1258 runqueue_node
->pid
= current
->pid
;
1259 runqueue_node
->filp
= file
;
1260 list_add_tail(&runqueue_node
->list
, &g2d
->runqueue
);
1261 if (!g2d
->runqueue_node
)
1262 g2d_exec_runqueue(g2d
);
1263 mutex_unlock(&g2d
->runqueue_mutex
);
1265 if (runqueue_node
->async
)
1268 wait_for_completion(&runqueue_node
->complete
);
1269 g2d_free_runqueue_node(g2d
, runqueue_node
);
1274 EXPORT_SYMBOL_GPL(exynos_g2d_exec_ioctl
);
1276 static int g2d_subdrv_probe(struct drm_device
*drm_dev
, struct device
*dev
)
1278 struct g2d_data
*g2d
;
1281 g2d
= dev_get_drvdata(dev
);
1285 /* allocate dma-aware cmdlist buffer. */
1286 ret
= g2d_init_cmdlist(g2d
);
1288 dev_err(dev
, "cmdlist init failed\n");
1292 if (!is_drm_iommu_supported(drm_dev
))
1295 ret
= drm_iommu_attach_device(drm_dev
, dev
);
1297 dev_err(dev
, "failed to enable iommu.\n");
1298 g2d_fini_cmdlist(g2d
);
1305 static void g2d_subdrv_remove(struct drm_device
*drm_dev
, struct device
*dev
)
1307 if (!is_drm_iommu_supported(drm_dev
))
1310 drm_iommu_detach_device(drm_dev
, dev
);
1313 static int g2d_open(struct drm_device
*drm_dev
, struct device
*dev
,
1314 struct drm_file
*file
)
1316 struct drm_exynos_file_private
*file_priv
= file
->driver_priv
;
1317 struct exynos_drm_g2d_private
*g2d_priv
;
1319 g2d_priv
= kzalloc(sizeof(*g2d_priv
), GFP_KERNEL
);
1321 dev_err(dev
, "failed to allocate g2d private data\n");
1325 g2d_priv
->dev
= dev
;
1326 file_priv
->g2d_priv
= g2d_priv
;
1328 INIT_LIST_HEAD(&g2d_priv
->inuse_cmdlist
);
1329 INIT_LIST_HEAD(&g2d_priv
->event_list
);
1330 INIT_LIST_HEAD(&g2d_priv
->userptr_list
);
1335 static void g2d_close(struct drm_device
*drm_dev
, struct device
*dev
,
1336 struct drm_file
*file
)
1338 struct drm_exynos_file_private
*file_priv
= file
->driver_priv
;
1339 struct exynos_drm_g2d_private
*g2d_priv
= file_priv
->g2d_priv
;
1340 struct g2d_data
*g2d
;
1341 struct g2d_cmdlist_node
*node
, *n
;
1346 g2d
= dev_get_drvdata(dev
);
1350 mutex_lock(&g2d
->cmdlist_mutex
);
1351 list_for_each_entry_safe(node
, n
, &g2d_priv
->inuse_cmdlist
, list
) {
1353 * unmap all gem objects not completed.
1355 * P.S. if current process was terminated forcely then
1356 * there may be some commands in inuse_cmdlist so unmap
1359 g2d_unmap_cmdlist_gem(g2d
, node
, file
);
1360 list_move_tail(&node
->list
, &g2d
->free_cmdlist
);
1362 mutex_unlock(&g2d
->cmdlist_mutex
);
1364 /* release all g2d_userptr in pool. */
1365 g2d_userptr_free_all(drm_dev
, g2d
, file
);
1367 kfree(file_priv
->g2d_priv
);
1370 static int g2d_probe(struct platform_device
*pdev
)
1372 struct device
*dev
= &pdev
->dev
;
1373 struct resource
*res
;
1374 struct g2d_data
*g2d
;
1375 struct exynos_drm_subdrv
*subdrv
;
1378 g2d
= devm_kzalloc(dev
, sizeof(*g2d
), GFP_KERNEL
);
1380 dev_err(dev
, "failed to allocate driver data\n");
1384 g2d
->runqueue_slab
= kmem_cache_create("g2d_runqueue_slab",
1385 sizeof(struct g2d_runqueue_node
), 0, 0, NULL
);
1386 if (!g2d
->runqueue_slab
)
1391 g2d
->g2d_workq
= create_singlethread_workqueue("g2d");
1392 if (!g2d
->g2d_workq
) {
1393 dev_err(dev
, "failed to create workqueue\n");
1395 goto err_destroy_slab
;
1398 INIT_WORK(&g2d
->runqueue_work
, g2d_runqueue_worker
);
1399 INIT_LIST_HEAD(&g2d
->free_cmdlist
);
1400 INIT_LIST_HEAD(&g2d
->runqueue
);
1402 mutex_init(&g2d
->cmdlist_mutex
);
1403 mutex_init(&g2d
->runqueue_mutex
);
1405 g2d
->gate_clk
= devm_clk_get(dev
, "fimg2d");
1406 if (IS_ERR(g2d
->gate_clk
)) {
1407 dev_err(dev
, "failed to get gate clock\n");
1408 ret
= PTR_ERR(g2d
->gate_clk
);
1409 goto err_destroy_workqueue
;
1412 pm_runtime_enable(dev
);
1414 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1416 g2d
->regs
= devm_ioremap_resource(dev
, res
);
1417 if (IS_ERR(g2d
->regs
)) {
1418 ret
= PTR_ERR(g2d
->regs
);
1422 g2d
->irq
= platform_get_irq(pdev
, 0);
1424 dev_err(dev
, "failed to get irq\n");
1429 ret
= devm_request_irq(dev
, g2d
->irq
, g2d_irq_handler
, 0,
1432 dev_err(dev
, "irq request failed\n");
1436 g2d
->max_pool
= MAX_POOL
;
1438 platform_set_drvdata(pdev
, g2d
);
1440 subdrv
= &g2d
->subdrv
;
1442 subdrv
->probe
= g2d_subdrv_probe
;
1443 subdrv
->remove
= g2d_subdrv_remove
;
1444 subdrv
->open
= g2d_open
;
1445 subdrv
->close
= g2d_close
;
1447 ret
= exynos_drm_subdrv_register(subdrv
);
1449 dev_err(dev
, "failed to register drm g2d device\n");
1453 dev_info(dev
, "The exynos g2d(ver %d.%d) successfully probed\n",
1454 G2D_HW_MAJOR_VER
, G2D_HW_MINOR_VER
);
1459 pm_runtime_disable(dev
);
1460 err_destroy_workqueue
:
1461 destroy_workqueue(g2d
->g2d_workq
);
1463 kmem_cache_destroy(g2d
->runqueue_slab
);
1467 static int g2d_remove(struct platform_device
*pdev
)
1469 struct g2d_data
*g2d
= platform_get_drvdata(pdev
);
1471 cancel_work_sync(&g2d
->runqueue_work
);
1472 exynos_drm_subdrv_unregister(&g2d
->subdrv
);
1474 while (g2d
->runqueue_node
) {
1475 g2d_free_runqueue_node(g2d
, g2d
->runqueue_node
);
1476 g2d
->runqueue_node
= g2d_get_runqueue_node(g2d
);
1479 pm_runtime_disable(&pdev
->dev
);
1481 g2d_fini_cmdlist(g2d
);
1482 destroy_workqueue(g2d
->g2d_workq
);
1483 kmem_cache_destroy(g2d
->runqueue_slab
);
1488 #ifdef CONFIG_PM_SLEEP
1489 static int g2d_suspend(struct device
*dev
)
1491 struct g2d_data
*g2d
= dev_get_drvdata(dev
);
1493 mutex_lock(&g2d
->runqueue_mutex
);
1494 g2d
->suspended
= true;
1495 mutex_unlock(&g2d
->runqueue_mutex
);
1497 while (g2d
->runqueue_node
)
1498 /* FIXME: good range? */
1499 usleep_range(500, 1000);
1501 flush_work(&g2d
->runqueue_work
);
1506 static int g2d_resume(struct device
*dev
)
1508 struct g2d_data
*g2d
= dev_get_drvdata(dev
);
1510 g2d
->suspended
= false;
1511 g2d_exec_runqueue(g2d
);
1517 static SIMPLE_DEV_PM_OPS(g2d_pm_ops
, g2d_suspend
, g2d_resume
);
1520 static const struct of_device_id exynos_g2d_match
[] = {
1521 { .compatible
= "samsung,exynos5250-g2d" },
1524 MODULE_DEVICE_TABLE(of
, exynos_g2d_match
);
1527 struct platform_driver g2d_driver
= {
1529 .remove
= g2d_remove
,
1532 .owner
= THIS_MODULE
,
1534 .of_match_table
= of_match_ptr(exynos_g2d_match
),