2 * Copyright (C) 2015 Etnaviv Project
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/kernel.h>
19 #include "etnaviv_gem.h"
20 #include "etnaviv_gpu.h"
22 #include "cmdstream.xml.h"
24 #define EXTRACT(val, field) (((val) & field##__MASK) >> field##__SHIFT)
26 struct etna_validation_state {
27 struct etnaviv_gpu *gpu;
28 const struct drm_etnaviv_gem_submit_reloc *relocs;
29 unsigned int num_relocs;
36 } etnaviv_sensitive_states[] __initconst = {
37 #define ST(start, num) { (start) >> 2, (num) }
81 #define ETNAVIV_STATES_SIZE (VIV_FE_LOAD_STATE_HEADER_OFFSET__MASK + 1u)
82 static DECLARE_BITMAP(etnaviv_states, ETNAVIV_STATES_SIZE);
84 void __init etnaviv_validate_init(void)
88 for (i = 0; i < ARRAY_SIZE(etnaviv_sensitive_states); i++)
89 bitmap_set(etnaviv_states, etnaviv_sensitive_states[i].offset,
90 etnaviv_sensitive_states[i].size);
93 static void etnaviv_warn_if_non_sensitive(struct etna_validation_state *state,
94 unsigned int buf_offset, unsigned int state_addr)
96 if (state->num_relocs && state->relocs->submit_offset < buf_offset) {
97 dev_warn_once(state->gpu->dev,
98 "%s: relocation for non-sensitive state 0x%x at offset %u\n",
100 state->relocs->submit_offset);
101 while (state->num_relocs &&
102 state->relocs->submit_offset < buf_offset) {
109 static bool etnaviv_validate_load_state(struct etna_validation_state *state,
110 u32 *ptr, unsigned int state_offset, unsigned int num)
112 unsigned int size = min(ETNAVIV_STATES_SIZE, state_offset + num);
113 unsigned int st_offset = state_offset, buf_offset;
115 for_each_set_bit_from(st_offset, etnaviv_states, size) {
116 buf_offset = (ptr - state->start +
117 st_offset - state_offset) * 4;
119 etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4);
120 if (state->num_relocs &&
121 state->relocs->submit_offset == buf_offset) {
127 dev_warn_ratelimited(state->gpu->dev,
128 "%s: load state touches restricted state 0x%x at offset %u\n",
129 __func__, st_offset * 4, buf_offset);
133 if (state->num_relocs) {
134 buf_offset = (ptr - state->start + num) * 4;
135 etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4 +
136 state->relocs->submit_offset -
143 static uint8_t cmd_length[32] = {
144 [FE_OPCODE_DRAW_PRIMITIVES] = 4,
145 [FE_OPCODE_DRAW_INDEXED_PRIMITIVES] = 6,
147 [FE_OPCODE_STALL] = 2,
150 bool etnaviv_cmd_validate_one(struct etnaviv_gpu *gpu, u32 *stream,
152 struct drm_etnaviv_gem_submit_reloc *relocs,
153 unsigned int reloc_size)
155 struct etna_validation_state state;
157 u32 *end = buf + size;
160 state.relocs = relocs;
161 state.num_relocs = reloc_size;
162 state.start = stream;
166 unsigned int len, n, off;
167 unsigned int op = cmd >> 27;
170 case FE_OPCODE_LOAD_STATE:
171 n = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_COUNT);
172 len = ALIGN(1 + n, 2);
176 off = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_OFFSET);
177 if (!etnaviv_validate_load_state(&state, buf + 1,
182 case FE_OPCODE_DRAW_2D:
183 n = EXTRACT(cmd, VIV_FE_DRAW_2D_HEADER_COUNT);
190 len = cmd_length[op];
192 dev_err(gpu->dev, "%s: op %u not permitted at offset %tu\n",
193 __func__, op, buf - state.start);
203 dev_err(gpu->dev, "%s: commands overflow end of buffer: %tu > %u\n",
204 __func__, buf - state.start, size);