diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/atom.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atom.c | 59 |
1 files changed, 47 insertions, 12 deletions
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c index d75788feac6c..b7fe660985c4 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) |