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-rw-r--r--drivers/gpu/drm/radeon/atom.c59
-rw-r--r--drivers/gpu/drm/radeon/atom.h2
2 files changed, 48 insertions, 13 deletions
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index d75788feac6..b7fe660985c 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -52,15 +52,17 @@
typedef struct {
struct atom_context *ctx;
-
uint32_t *ps, *ws;
int ps_shift;
uint16_t start;
+ unsigned last_jump;
+ unsigned long last_jump_jiffies;
+ bool abort;
} atom_exec_context;
int atom_debug = 0;
-static void atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params);
-void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params);
+static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params);
+int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params);
static uint32_t atom_arg_mask[8] =
{ 0xFFFFFFFF, 0xFFFF, 0xFFFF00, 0xFFFF0000, 0xFF, 0xFF00, 0xFF0000,
@@ -604,12 +606,17 @@ static void atom_op_beep(atom_exec_context *ctx, int *ptr, int arg)
static void atom_op_calltable(atom_exec_context *ctx, int *ptr, int arg)
{
int idx = U8((*ptr)++);
+ int r = 0;
+
if (idx < ATOM_TABLE_NAMES_CNT)
SDEBUG(" table: %d (%s)\n", idx, atom_table_names[idx]);
else
SDEBUG(" table: %d\n", idx);
if (U16(ctx->ctx->cmd_table + 4 + 2 * idx))
- atom_execute_table_locked(ctx->ctx, idx, ctx->ps + ctx->ps_shift);
+ r = atom_execute_table_locked(ctx->ctx, idx, ctx->ps + ctx->ps_shift);
+ if (r) {
+ ctx->abort = true;
+ }
}
static void atom_op_clear(atom_exec_context *ctx, int *ptr, int arg)
@@ -673,6 +680,8 @@ static void atom_op_eot(atom_exec_context *ctx, int *ptr, int arg)
static void atom_op_jump(atom_exec_context *ctx, int *ptr, int arg)
{
int execute = 0, target = U16(*ptr);
+ unsigned long cjiffies;
+
(*ptr) += 2;
switch (arg) {
case ATOM_COND_ABOVE:
@@ -700,8 +709,25 @@ static void atom_op_jump(atom_exec_context *ctx, int *ptr, int arg)
if (arg != ATOM_COND_ALWAYS)
SDEBUG(" taken: %s\n", execute ? "yes" : "no");
SDEBUG(" target: 0x%04X\n", target);
- if (execute)
+ if (execute) {
+ if (ctx->last_jump == (ctx->start + target)) {
+ cjiffies = jiffies;
+ if (time_after(cjiffies, ctx->last_jump_jiffies)) {
+ cjiffies -= ctx->last_jump_jiffies;
+ if ((jiffies_to_msecs(cjiffies) > 1000)) {
+ DRM_ERROR("atombios stuck in loop for more than 1sec aborting\n");
+ ctx->abort = true;
+ }
+ } else {
+ /* jiffies wrap around we will just wait a little longer */
+ ctx->last_jump_jiffies = jiffies;
+ }
+ } else {
+ ctx->last_jump = ctx->start + target;
+ ctx->last_jump_jiffies = jiffies;
+ }
*ptr = ctx->start + target;
+ }
}
static void atom_op_mask(atom_exec_context *ctx, int *ptr, int arg)
@@ -1104,7 +1130,7 @@ static struct {
atom_op_shr, ATOM_ARG_MC}, {
atom_op_debug, 0},};
-static void atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params)
+static int atom_execute_table_locked(struct atom_context *ctx, int index, uint32_t * params)
{
int base = CU16(ctx->cmd_table + 4 + 2 * index);
int len, ws, ps, ptr;
@@ -1112,7 +1138,7 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3
atom_exec_context ectx;
if (!base)
- return;
+ return -EINVAL;
len = CU16(base + ATOM_CT_SIZE_PTR);
ws = CU8(base + ATOM_CT_WS_PTR);
@@ -1125,6 +1151,8 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3
ectx.ps_shift = ps / 4;
ectx.start = base;
ectx.ps = params;
+ ectx.abort = false;
+ ectx.last_jump = 0;
if (ws)
ectx.ws = kzalloc(4 * ws, GFP_KERNEL);
else
@@ -1137,6 +1165,11 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3
SDEBUG("%s @ 0x%04X\n", atom_op_names[op], ptr - 1);
else
SDEBUG("[%d] @ 0x%04X\n", op, ptr - 1);
+ if (ectx.abort) {
+ DRM_ERROR("atombios stuck executing %04X (len %d, WS %d, PS %d) @ 0x%04X\n",
+ base, len, ws, ps, ptr - 1);
+ return -EINVAL;
+ }
if (op < ATOM_OP_CNT && op > 0)
opcode_table[op].func(&ectx, &ptr,
@@ -1152,10 +1185,13 @@ static void atom_execute_table_locked(struct atom_context *ctx, int index, uint3
if (ws)
kfree(ectx.ws);
+ return 0;
}
-void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
+int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
{
+ int r;
+
mutex_lock(&ctx->mutex);
/* reset reg block */
ctx->reg_block = 0;
@@ -1163,8 +1199,9 @@ void atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
ctx->fb_base = 0;
/* reset io mode */
ctx->io_mode = ATOM_IO_MM;
- atom_execute_table_locked(ctx, index, params);
+ r = atom_execute_table_locked(ctx, index, params);
mutex_unlock(&ctx->mutex);
+ return r;
}
static int atom_iio_len[] = { 1, 2, 3, 3, 3, 3, 4, 4, 4, 3 };
@@ -1248,9 +1285,7 @@ int atom_asic_init(struct atom_context *ctx)
if (!CU16(ctx->cmd_table + 4 + 2 * ATOM_CMD_INIT))
return 1;
- atom_execute_table(ctx, ATOM_CMD_INIT, ps);
-
- return 0;
+ return atom_execute_table(ctx, ATOM_CMD_INIT, ps);
}
void atom_destroy(struct atom_context *ctx)
diff --git a/drivers/gpu/drm/radeon/atom.h b/drivers/gpu/drm/radeon/atom.h
index bc73781423a..1b262631480 100644
--- a/drivers/gpu/drm/radeon/atom.h
+++ b/drivers/gpu/drm/radeon/atom.h
@@ -140,7 +140,7 @@ struct atom_context {
extern int atom_debug;
struct atom_context *atom_parse(struct card_info *, void *);
-void atom_execute_table(struct atom_context *, int, uint32_t *);
+int atom_execute_table(struct atom_context *, int, uint32_t *);
int atom_asic_init(struct atom_context *);
void atom_destroy(struct atom_context *);
void atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size, uint8_t *frev, uint8_t *crev, uint16_t *data_start);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 23:14:22 +0000