1
2
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4
5
6#include <linux/kernel.h>
7
8#include "etnaviv_gem.h"
9#include "etnaviv_gpu.h"
10
11#include "cmdstream.xml.h"
12
13#define EXTRACT(val, field) (((val) & field##__MASK) >> field##__SHIFT)
14
15struct etna_validation_state {
16 struct etnaviv_gpu *gpu;
17 const struct drm_etnaviv_gem_submit_reloc *relocs;
18 unsigned int num_relocs;
19 u32 *start;
20};
21
22static const struct {
23 u16 offset;
24 u16 size;
25} etnaviv_sensitive_states[] __initconst = {
26#define ST(start, num) { (start) >> 2, (num) }
27
28 ST(0x1200, 1),
29 ST(0x1228, 1),
30 ST(0x1238, 1),
31 ST(0x1284, 1),
32 ST(0x128c, 1),
33 ST(0x1304, 1),
34 ST(0x1310, 1),
35 ST(0x1318, 1),
36 ST(0x12800, 4),
37 ST(0x128a0, 4),
38 ST(0x128c0, 4),
39 ST(0x12970, 4),
40 ST(0x12a00, 8),
41 ST(0x12b40, 8),
42 ST(0x12b80, 8),
43 ST(0x12ce0, 8),
44
45 ST(0x0644, 1),
46 ST(0x064c, 1),
47 ST(0x0680, 8),
48 ST(0x086c, 1),
49 ST(0x1028, 1),
50 ST(0x1410, 1),
51 ST(0x1430, 1),
52 ST(0x1458, 1),
53 ST(0x1460, 8),
54 ST(0x1480, 8),
55 ST(0x1500, 8),
56 ST(0x1520, 8),
57 ST(0x1608, 1),
58 ST(0x1610, 1),
59 ST(0x1658, 1),
60 ST(0x165c, 1),
61 ST(0x1664, 1),
62 ST(0x1668, 1),
63 ST(0x16a4, 1),
64 ST(0x16c0, 8),
65 ST(0x16e0, 8),
66 ST(0x1740, 8),
67 ST(0x17c0, 8),
68 ST(0x17e0, 8),
69 ST(0x2400, 14 * 16),
70 ST(0x3824, 1),
71 ST(0x10800, 32 * 16),
72 ST(0x14600, 16),
73 ST(0x14800, 8 * 8),
74#undef ST
75};
76
77#define ETNAVIV_STATES_SIZE (VIV_FE_LOAD_STATE_HEADER_OFFSET__MASK + 1u)
78static DECLARE_BITMAP(etnaviv_states, ETNAVIV_STATES_SIZE);
79
80void __init etnaviv_validate_init(void)
81{
82 unsigned int i;
83
84 for (i = 0; i < ARRAY_SIZE(etnaviv_sensitive_states); i++)
85 bitmap_set(etnaviv_states, etnaviv_sensitive_states[i].offset,
86 etnaviv_sensitive_states[i].size);
87}
88
89static void etnaviv_warn_if_non_sensitive(struct etna_validation_state *state,
90 unsigned int buf_offset, unsigned int state_addr)
91{
92 if (state->num_relocs && state->relocs->submit_offset < buf_offset) {
93 dev_warn_once(state->gpu->dev,
94 "%s: relocation for non-sensitive state 0x%x at offset %u\n",
95 __func__, state_addr,
96 state->relocs->submit_offset);
97 while (state->num_relocs &&
98 state->relocs->submit_offset < buf_offset) {
99 state->relocs++;
100 state->num_relocs--;
101 }
102 }
103}
104
105static bool etnaviv_validate_load_state(struct etna_validation_state *state,
106 u32 *ptr, unsigned int state_offset, unsigned int num)
107{
108 unsigned int size = min(ETNAVIV_STATES_SIZE, state_offset + num);
109 unsigned int st_offset = state_offset, buf_offset;
110
111 for_each_set_bit_from(st_offset, etnaviv_states, size) {
112 buf_offset = (ptr - state->start +
113 st_offset - state_offset) * 4;
114
115 etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4);
116 if (state->num_relocs &&
117 state->relocs->submit_offset == buf_offset) {
118 state->relocs++;
119 state->num_relocs--;
120 continue;
121 }
122
123 dev_warn_ratelimited(state->gpu->dev,
124 "%s: load state touches restricted state 0x%x at offset %u\n",
125 __func__, st_offset * 4, buf_offset);
126 return false;
127 }
128
129 if (state->num_relocs) {
130 buf_offset = (ptr - state->start + num) * 4;
131 etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4 +
132 state->relocs->submit_offset -
133 buf_offset);
134 }
135
136 return true;
137}
138
139static uint8_t cmd_length[32] = {
140 [FE_OPCODE_DRAW_PRIMITIVES] = 4,
141 [FE_OPCODE_DRAW_INDEXED_PRIMITIVES] = 6,
142 [FE_OPCODE_DRAW_INSTANCED] = 4,
143 [FE_OPCODE_NOP] = 2,
144 [FE_OPCODE_STALL] = 2,
145};
146
147bool etnaviv_cmd_validate_one(struct etnaviv_gpu *gpu, u32 *stream,
148 unsigned int size,
149 struct drm_etnaviv_gem_submit_reloc *relocs,
150 unsigned int reloc_size)
151{
152 struct etna_validation_state state;
153 u32 *buf = stream;
154 u32 *end = buf + size;
155
156 state.gpu = gpu;
157 state.relocs = relocs;
158 state.num_relocs = reloc_size;
159 state.start = stream;
160
161 while (buf < end) {
162 u32 cmd = *buf;
163 unsigned int len, n, off;
164 unsigned int op = cmd >> 27;
165
166 switch (op) {
167 case FE_OPCODE_LOAD_STATE:
168 n = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_COUNT);
169 len = ALIGN(1 + n, 2);
170 if (buf + len > end)
171 break;
172
173 off = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_OFFSET);
174 if (!etnaviv_validate_load_state(&state, buf + 1,
175 off, n))
176 return false;
177 break;
178
179 case FE_OPCODE_DRAW_2D:
180 n = EXTRACT(cmd, VIV_FE_DRAW_2D_HEADER_COUNT);
181 if (n == 0)
182 n = 256;
183 len = 2 + n * 2;
184 break;
185
186 default:
187 len = cmd_length[op];
188 if (len == 0) {
189 dev_err(gpu->dev, "%s: op %u not permitted at offset %tu\n",
190 __func__, op, buf - state.start);
191 return false;
192 }
193 break;
194 }
195
196 buf += len;
197 }
198
199 if (buf > end) {
200 dev_err(gpu->dev, "%s: commands overflow end of buffer: %tu > %u\n",
201 __func__, buf - state.start, size);
202 return false;
203 }
204
205 return true;
206}
207
