diff options
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c b/drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c new file mode 100644 index 000000000000..dcfd565c88d1 --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2015 Etnaviv Project + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> + +#include "etnaviv_gem.h" +#include "etnaviv_gpu.h" + +#include "cmdstream.xml.h" + +#define EXTRACT(val, field) (((val) & field##__MASK) >> field##__SHIFT) + +struct etna_validation_state { + struct etnaviv_gpu *gpu; + const struct drm_etnaviv_gem_submit_reloc *relocs; + unsigned int num_relocs; + u32 *start; +}; + +static const struct { + u16 offset; + u16 size; +} etnaviv_sensitive_states[] __initconst = { +#define ST(start, num) { (start) >> 2, (num) } + /* 2D */ + ST(0x1200, 1), + ST(0x1228, 1), + ST(0x1238, 1), + ST(0x1284, 1), + ST(0x128c, 1), + ST(0x1304, 1), + ST(0x1310, 1), + ST(0x1318, 1), + ST(0x12800, 4), + ST(0x128a0, 4), + ST(0x128c0, 4), + ST(0x12970, 4), + ST(0x12a00, 8), + ST(0x12b40, 8), + ST(0x12b80, 8), + ST(0x12ce0, 8), + /* 3D */ + ST(0x0644, 1), + ST(0x064c, 1), + ST(0x0680, 8), + ST(0x1410, 1), + ST(0x1430, 1), + ST(0x1458, 1), + ST(0x1460, 8), + ST(0x1480, 8), + ST(0x1500, 8), + ST(0x1520, 8), + ST(0x1608, 1), + ST(0x1610, 1), + ST(0x1658, 1), + ST(0x165c, 1), + ST(0x1664, 1), + ST(0x1668, 1), + ST(0x16a4, 1), + ST(0x16c0, 8), + ST(0x16e0, 8), + ST(0x1740, 8), + ST(0x2400, 14 * 16), + ST(0x10800, 32 * 16), +#undef ST +}; + +#define ETNAVIV_STATES_SIZE (VIV_FE_LOAD_STATE_HEADER_OFFSET__MASK + 1u) +static DECLARE_BITMAP(etnaviv_states, ETNAVIV_STATES_SIZE); + +void __init etnaviv_validate_init(void) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(etnaviv_sensitive_states); i++) + bitmap_set(etnaviv_states, etnaviv_sensitive_states[i].offset, + etnaviv_sensitive_states[i].size); +} + +static void etnaviv_warn_if_non_sensitive(struct etna_validation_state *state, + unsigned int buf_offset, unsigned int state_addr) +{ + if (state->num_relocs && state->relocs->submit_offset < buf_offset) { + dev_warn_once(state->gpu->dev, + "%s: relocation for non-sensitive state 0x%x at offset %u\n", + __func__, state_addr, + state->relocs->submit_offset); + while (state->num_relocs && + state->relocs->submit_offset < buf_offset) { + state->relocs++; + state->num_relocs--; + } + } +} + +static bool etnaviv_validate_load_state(struct etna_validation_state *state, + u32 *ptr, unsigned int state_offset, unsigned int num) +{ + unsigned int size = min(ETNAVIV_STATES_SIZE, state_offset + num); + unsigned int st_offset = state_offset, buf_offset; + + for_each_set_bit_from(st_offset, etnaviv_states, size) { + buf_offset = (ptr - state->start + + st_offset - state_offset) * 4; + + etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4); + if (state->num_relocs && + state->relocs->submit_offset == buf_offset) { + state->relocs++; + state->num_relocs--; + continue; + } + + dev_warn_ratelimited(state->gpu->dev, + "%s: load state touches restricted state 0x%x at offset %u\n", + __func__, st_offset * 4, buf_offset); + return false; + } + + if (state->num_relocs) { + buf_offset = (ptr - state->start + num) * 4; + etnaviv_warn_if_non_sensitive(state, buf_offset, st_offset * 4 + + state->relocs->submit_offset - + buf_offset); + } + + return true; +} + +static uint8_t cmd_length[32] = { + [FE_OPCODE_DRAW_PRIMITIVES] = 4, + [FE_OPCODE_DRAW_INDEXED_PRIMITIVES] = 6, + [FE_OPCODE_NOP] = 2, + [FE_OPCODE_STALL] = 2, +}; + +bool etnaviv_cmd_validate_one(struct etnaviv_gpu *gpu, u32 *stream, + unsigned int size, + struct drm_etnaviv_gem_submit_reloc *relocs, + unsigned int reloc_size) +{ + struct etna_validation_state state; + u32 *buf = stream; + u32 *end = buf + size; + + state.gpu = gpu; + state.relocs = relocs; + state.num_relocs = reloc_size; + state.start = stream; + + while (buf < end) { + u32 cmd = *buf; + unsigned int len, n, off; + unsigned int op = cmd >> 27; + + switch (op) { + case FE_OPCODE_LOAD_STATE: + n = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_COUNT); + len = ALIGN(1 + n, 2); + if (buf + len > end) + break; + + off = EXTRACT(cmd, VIV_FE_LOAD_STATE_HEADER_OFFSET); + if (!etnaviv_validate_load_state(&state, buf + 1, + off, n)) + return false; + break; + + case FE_OPCODE_DRAW_2D: + n = EXTRACT(cmd, VIV_FE_DRAW_2D_HEADER_COUNT); + if (n == 0) + n = 256; + len = 2 + n * 2; + break; + + default: + len = cmd_length[op]; + if (len == 0) { + dev_err(gpu->dev, "%s: op %u not permitted at offset %tu\n", + __func__, op, buf - state.start); + return false; + } + break; + } + + buf += len; + } + + if (buf > end) { + dev_err(gpu->dev, "%s: commands overflow end of buffer: %tu > %u\n", + __func__, buf - state.start, size); + return false; + } + + return true; +} |