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1 /*
2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * on the rights to use, copy, modify, merge, publish, distribute, sub
9  * license, and/or sell copies of the Software, and to permit persons to whom
10  * the Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23 
24 /**
25  * This file contains macros for building command buffers in memory.
26  *
27  * Use NEW_CB for buffers with a varying size and it will also allocate
28  * the buffer.
29  * Use BEGIN_CB for arrays with a static size.
30  *
31  * Example:
32  *
33  *     uint32_t cb[3];
34  *     CB_LOCALS;
35  *
36  *     BEGIN_CB(cb, 3);
37  *     OUT_CB_REG_SEQ(R500_RB3D_CONSTANT_COLOR_AR, 2);
38  *     OUT_CB(blend_color_red_alpha);
39  *     OUT_CB(blend_color_green_blue);
40  *     END_CB;
41  *
42  * And later:
43  *
44  *     CS_LOCALS;
45  *     WRITE_CS_TABLE(cb, 3);
46  *
47  * Or using a little slower variant:
48  *
49  *     CS_LOCALS;
50  *     BEGIN_CS(cb, 3);
51  *     OUT_CS_TABLE(cb, 3);
52  *     END_CS;
53  */
54 
55 #ifndef R300_CB_H
56 #define R300_CB_H
57 
58 #include "r300_reg.h"
59 
60 /* Yes, I know macros are ugly. However, they are much prettier than the code
61  * that they neatly hide away, and don't have the cost of function setup, so
62  * we're going to use them. */
63 
64 /**
65  * Command buffer setup.
66  */
67 
68 #ifdef DEBUG
69 
70 #define CB_LOCALS \
71     int cs_count = 0; \
72     uint32_t *cs_ptr = NULL; \
73     (void) cs_count; (void) cs_ptr
74 
75 #define BEGIN_CB(ptr, size) do { \
76     assert(sizeof(*(ptr)) == sizeof(uint32_t)); \
77     cs_count = (size); \
78     cs_ptr = (ptr); \
79 } while (0)
80 
81 #define NEW_CB(ptr, size) \
82     do { \
83     assert(sizeof(*(ptr)) == sizeof(uint32_t)); \
84     cs_count = (size); \
85     cs_ptr = (ptr) = malloc((size) * sizeof(uint32_t)); \
86 } while (0)
87 
88 #define END_CB do { \
89     if (cs_count != 0) \
90         debug_printf("r300: Warning: cs_count off by %d at (%s, %s:%i)\n", \
91                      cs_count, __FUNCTION__, __FILE__, __LINE__); \
92 } while (0)
93 
94 #define CB_USED_DW(x) cs_count -= x
95 
96 #else
97 
98 #define CB_LOCALS \
99     uint32_t *cs_ptr = NULL; (void) cs_ptr
100 
101 #define NEW_CB(ptr, size) \
102     cs_ptr = (ptr) = malloc((size) * sizeof(uint32_t))
103 
104 #define BEGIN_CB(ptr, size) cs_ptr = (ptr)
105 #define END_CB
106 #define CB_USED_DW(x)
107 
108 #endif
109 
110 
111 /**
112  * Storing pure DWORDs.
113  */
114 
115 #define OUT_CB(value) do { \
116     *cs_ptr = (value); \
117     cs_ptr++; \
118     CB_USED_DW(1); \
119 } while (0)
120 
121 #define OUT_CB_TABLE(values, count) do { \
122     memcpy(cs_ptr, values, count * sizeof(uint32_t)); \
123     cs_ptr += count; \
124     CB_USED_DW(count); \
125 } while (0)
126 
127 #define OUT_CB_32F(value) \
128     OUT_CB(fui(value));
129 
130 #define OUT_CB_REG(register, value) do { \
131     assert(register); \
132     OUT_CB(CP_PACKET0(register, 0)); \
133     OUT_CB(value); \
134 } while (0)
135 
136 /* Note: This expects count to be the number of registers,
137  * not the actual packet0 count! */
138 #define OUT_CB_REG_SEQ(register, count) do { \
139     assert(register); \
140     OUT_CB(CP_PACKET0(register, (count) - 1)); \
141 } while (0)
142 
143 #define OUT_CB_ONE_REG(register, count) do { \
144     assert(register); \
145     OUT_CB(CP_PACKET0(register, (count) - 1) | RADEON_ONE_REG_WR); \
146 } while (0)
147 
148 #define OUT_CB_PKT3(op, count) \
149     OUT_CB(CP_PACKET3(op, count))
150 
151 #endif /* R300_CB_H */
152