1 /*
2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
3  * Author: Rob Clark <rob@ti.com>
4  *         Andy Gross <andy.gross@ti.com>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License as
8  * published by the Free Software Foundation version 2.
9  *
10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11  * kind, whether express or implied; without even the implied warranty
12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  */
15 #ifndef OMAP_DMM_TILER_H
16 #define OMAP_DMM_TILER_H
17 
18 #include "omap_drv.h"
19 #include "tcm.h"
20 
21 enum tiler_fmt {
22 	TILFMT_8BIT = 0,
23 	TILFMT_16BIT,
24 	TILFMT_32BIT,
25 	TILFMT_PAGE,
26 	TILFMT_NFORMATS
27 };
28 
29 struct pat_area {
30 	u32 x0:8;
31 	u32 y0:8;
32 	u32 x1:8;
33 	u32 y1:8;
34 };
35 
36 struct tiler_block {
37 	struct list_head alloc_node;	/* node for global block list */
38 	struct tcm_area area;		/* area */
39 	enum tiler_fmt fmt;		/* format */
40 };
41 
42 /* bits representing the same slot in DMM-TILER hw-block */
43 #define SLOT_WIDTH_BITS         6
44 #define SLOT_HEIGHT_BITS        6
45 
46 /* bits reserved to describe coordinates in DMM-TILER hw-block */
47 #define CONT_WIDTH_BITS         14
48 #define CONT_HEIGHT_BITS        13
49 
50 /* calculated constants */
51 #define TILER_PAGE              (1 << (SLOT_WIDTH_BITS + SLOT_HEIGHT_BITS))
52 #define TILER_WIDTH             (1 << (CONT_WIDTH_BITS - SLOT_WIDTH_BITS))
53 #define TILER_HEIGHT            (1 << (CONT_HEIGHT_BITS - SLOT_HEIGHT_BITS))
54 
55 /*
56 Table 15-11. Coding and Description of TILER Orientations
57 S Y X	Description				Alternate description
58 0 0 0	0-degree view				Natural view
59 0 0 1	0-degree view with vertical mirror 	180-degree view with horizontal mirror
60 0 1 0	0-degree view with horizontal mirror 	180-degree view with vertical mirror
61 0 1 1	180-degree view
62 1 0 0	90-degree view with vertical mirror	270-degree view with horizontal mirror
63 1 0 1	270-degree view
64 1 1 0	90-degree view
65 1 1 1	90-degree view with horizontal mirror	270-degree view with vertical mirror
66  */
67 #define MASK_XY_FLIP		(1 << 31)
68 #define MASK_Y_INVERT		(1 << 30)
69 #define MASK_X_INVERT		(1 << 29)
70 #define SHIFT_ACC_MODE		27
71 #define MASK_ACC_MODE		3
72 
73 #define MASK(bits) ((1 << (bits)) - 1)
74 
75 #define TILVIEW_8BIT    0x60000000u
76 #define TILVIEW_16BIT   (TILVIEW_8BIT  + VIEW_SIZE)
77 #define TILVIEW_32BIT   (TILVIEW_16BIT + VIEW_SIZE)
78 #define TILVIEW_PAGE    (TILVIEW_32BIT + VIEW_SIZE)
79 #define TILVIEW_END     (TILVIEW_PAGE  + VIEW_SIZE)
80 
81 /* create tsptr by adding view orientation and access mode */
82 #define TIL_ADDR(x, orient, a)\
83 	((u32) (x) | (orient) | ((a) << SHIFT_ACC_MODE))
84 
85 #ifdef CONFIG_DEBUG_FS
86 int tiler_map_show(struct seq_file *s, void *arg);
87 #endif
88 
89 /* pin/unpin */
90 int tiler_pin(struct tiler_block *block, struct page **pages,
91 		u32 npages, u32 roll, bool wait);
92 int tiler_unpin(struct tiler_block *block);
93 
94 /* reserve/release */
95 struct tiler_block *tiler_reserve_2d(enum tiler_fmt fmt, u16 w, u16 h,
96 				u16 align);
97 struct tiler_block *tiler_reserve_1d(size_t size);
98 int tiler_release(struct tiler_block *block);
99 
100 /* utilities */
101 dma_addr_t tiler_ssptr(struct tiler_block *block);
102 dma_addr_t tiler_tsptr(struct tiler_block *block, u32 orient,
103 		u32 x, u32 y);
104 u32 tiler_stride(enum tiler_fmt fmt, u32 orient);
105 size_t tiler_size(enum tiler_fmt fmt, u16 w, u16 h);
106 size_t tiler_vsize(enum tiler_fmt fmt, u16 w, u16 h);
107 void tiler_align(enum tiler_fmt fmt, u16 *w, u16 *h);
108 u32 tiler_get_cpu_cache_flags(void);
109 bool dmm_is_available(void);
110 
111 extern struct platform_driver omap_dmm_driver;
112 
113 /* GEM bo flags -> tiler fmt */
114 static inline enum tiler_fmt gem2fmt(u32 flags)
115 {
116 	switch (flags & OMAP_BO_TILED) {
117 	case OMAP_BO_TILED_8:
118 		return TILFMT_8BIT;
119 	case OMAP_BO_TILED_16:
120 		return TILFMT_16BIT;
121 	case OMAP_BO_TILED_32:
122 		return TILFMT_32BIT;
123 	default:
124 		return TILFMT_PAGE;
125 	}
126 }
127 
128 static inline bool validfmt(enum tiler_fmt fmt)
129 {
130 	switch (fmt) {
131 	case TILFMT_8BIT:
132 	case TILFMT_16BIT:
133 	case TILFMT_32BIT:
134 	case TILFMT_PAGE:
135 		return true;
136 	default:
137 		return false;
138 	}
139 }
140 
141 #endif
142