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Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c')
-rw-r--r--drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c206
1 files changed, 206 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 000000000..b106e8b28
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_cmd_parser.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2015-2018 Etnaviv Project
+ */
+
+#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(0x086c, 1),
+ ST(0x1028, 1),
+ 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(0x17c0, 8),
+ ST(0x17e0, 8),
+ ST(0x2400, 14 * 16),
+ ST(0x3824, 1),
+ ST(0x10800, 32 * 16),
+ ST(0x14600, 16),
+ ST(0x14800, 8 * 8),
+#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_DRAW_INSTANCED] = 4,
+ [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;
+}