diff options
Diffstat (limited to 'drivers/acpi/dispatcher/dsmethod.c')
| -rw-r--r-- | drivers/acpi/dispatcher/dsmethod.c | 404 |
1 files changed, 208 insertions, 196 deletions
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c index 9fc3f4c033e..36c1ca0b9ad 100644 --- a/drivers/acpi/dispatcher/dsmethod.c +++ b/drivers/acpi/dispatcher/dsmethod.c @@ -41,7 +41,6 @@ * POSSIBILITY OF SUCH DAMAGES. */ - #include <acpi/acpi.h> #include <acpi/acparser.h> #include <acpi/amlcode.h> @@ -49,67 +48,57 @@ #include <acpi/acinterp.h> #include <acpi/acnamesp.h> - #define _COMPONENT ACPI_DISPATCHER - ACPI_MODULE_NAME ("dsmethod") - +ACPI_MODULE_NAME("dsmethod") /******************************************************************************* * * FUNCTION: acpi_ds_parse_method * - * PARAMETERS: obj_handle - Method node + * PARAMETERS: Node - Method node * * RETURN: Status * - * DESCRIPTION: Call the parser and parse the AML that is associated with the - * method. + * DESCRIPTION: Parse the AML that is associated with the method. * * MUTEX: Assumes parser is locked * ******************************************************************************/ - -acpi_status -acpi_ds_parse_method ( - acpi_handle obj_handle) +acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node) { - acpi_status status; - union acpi_operand_object *obj_desc; - union acpi_parse_object *op; - struct acpi_namespace_node *node; - acpi_owner_id owner_id; - struct acpi_walk_state *walk_state; - - - ACPI_FUNCTION_TRACE_PTR ("ds_parse_method", obj_handle); + acpi_status status; + union acpi_operand_object *obj_desc; + union acpi_parse_object *op; + struct acpi_walk_state *walk_state; + ACPI_FUNCTION_TRACE_PTR("ds_parse_method", node); /* Parameter Validation */ - if (!obj_handle) { - return_ACPI_STATUS (AE_NULL_ENTRY); + if (!node) { + return_ACPI_STATUS(AE_NULL_ENTRY); } - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** named_obj=%p\n", - acpi_ut_get_node_name (obj_handle), obj_handle)); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "**** Parsing [%4.4s] **** named_obj=%p\n", + acpi_ut_get_node_name(node), node)); /* Extract the method object from the method Node */ - node = (struct acpi_namespace_node *) obj_handle; - obj_desc = acpi_ns_get_attached_object (node); + obj_desc = acpi_ns_get_attached_object(node); if (!obj_desc) { - return_ACPI_STATUS (AE_NULL_OBJECT); + return_ACPI_STATUS(AE_NULL_OBJECT); } /* Create a mutex for the method if there is a concurrency limit */ if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) && - (!obj_desc->method.semaphore)) { - status = acpi_os_create_semaphore (obj_desc->method.concurrency, - obj_desc->method.concurrency, - &obj_desc->method.semaphore); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); + (!obj_desc->method.semaphore)) { + status = acpi_os_create_semaphore(obj_desc->method.concurrency, + obj_desc->method.concurrency, + &obj_desc->method.semaphore); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); } } @@ -117,14 +106,14 @@ acpi_ds_parse_method ( * Allocate a new parser op to be the root of the parsed * method tree */ - op = acpi_ps_alloc_op (AML_METHOD_OP); + op = acpi_ps_alloc_op(AML_METHOD_OP); if (!op) { - return_ACPI_STATUS (AE_NO_MEMORY); + return_ACPI_STATUS(AE_NO_MEMORY); } /* Init new op with the method name and pointer back to the Node */ - acpi_ps_set_name (op, node->name.integer); + acpi_ps_set_name(op, node->name.integer); op->common.node = node; /* @@ -132,22 +121,27 @@ acpi_ds_parse_method ( * objects (such as Operation Regions) can be created during the * first pass parse. */ - owner_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD); - obj_desc->method.owning_id = owner_id; + status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id); + if (ACPI_FAILURE(status)) { + goto cleanup; + } /* Create and initialize a new walk state */ - walk_state = acpi_ds_create_walk_state (owner_id, NULL, NULL, NULL); + walk_state = + acpi_ds_create_walk_state(obj_desc->method.owner_id, NULL, NULL, + NULL); if (!walk_state) { - return_ACPI_STATUS (AE_NO_MEMORY); + status = AE_NO_MEMORY; + goto cleanup2; } - status = acpi_ds_init_aml_walk (walk_state, op, node, - obj_desc->method.aml_start, - obj_desc->method.aml_length, NULL, 1); - if (ACPI_FAILURE (status)) { - acpi_ds_delete_walk_state (walk_state); - return_ACPI_STATUS (status); + status = acpi_ds_init_aml_walk(walk_state, op, node, + obj_desc->method.aml_start, + obj_desc->method.aml_length, NULL, 1); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup2; } /* @@ -159,19 +153,30 @@ acpi_ds_parse_method ( * method so that operands to the named objects can take on dynamic * run-time values. */ - status = acpi_ps_parse_aml (walk_state); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); + status = acpi_ps_parse_aml(walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup2; } - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n", - acpi_ut_get_node_name (obj_handle), obj_handle, op)); + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, + "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n", + acpi_ut_get_node_name(node), node, op)); - acpi_ps_delete_parse_tree (op); - return_ACPI_STATUS (status); -} + /* + * Delete the parse tree. We simply re-parse the method for every + * execution since there isn't much overhead (compared to keeping lots + * of parse trees around) + */ + acpi_ns_delete_namespace_subtree(node); + acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id); + + cleanup2: + acpi_ut_release_owner_id(&obj_desc->method.owner_id); + cleanup: + acpi_ps_delete_parse_tree(op); + return_ACPI_STATUS(status); +} /******************************************************************************* * @@ -190,19 +195,23 @@ acpi_ds_parse_method ( ******************************************************************************/ acpi_status -acpi_ds_begin_method_execution ( - struct acpi_namespace_node *method_node, - union acpi_operand_object *obj_desc, - struct acpi_namespace_node *calling_method_node) +acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node, + union acpi_operand_object *obj_desc, + struct acpi_namespace_node *calling_method_node) { - acpi_status status = AE_OK; + acpi_status status = AE_OK; + ACPI_FUNCTION_TRACE_PTR("ds_begin_method_execution", method_node); - ACPI_FUNCTION_TRACE_PTR ("ds_begin_method_execution", method_node); + if (!method_node) { + return_ACPI_STATUS(AE_NULL_ENTRY); + } + /* Prevent wraparound of thread count */ - if (!method_node) { - return_ACPI_STATUS (AE_NULL_ENTRY); + if (obj_desc->method.thread_count == ACPI_UINT8_MAX) { + ACPI_REPORT_ERROR(("Method reached maximum reentrancy limit (255)\n")); + return_ACPI_STATUS(AE_AML_METHOD_LIMIT); } /* @@ -219,8 +228,9 @@ acpi_ds_begin_method_execution ( * thread that is making recursive method calls. */ if (method_node == calling_method_node) { - if (obj_desc->method.thread_count >= obj_desc->method.concurrency) { - return_ACPI_STATUS (AE_AML_METHOD_LIMIT); + if (obj_desc->method.thread_count >= + obj_desc->method.concurrency) { + return_ACPI_STATUS(AE_AML_METHOD_LIMIT); } } @@ -228,8 +238,21 @@ acpi_ds_begin_method_execution ( * Get a unit from the method semaphore. This releases the * interpreter if we block */ - status = acpi_ex_system_wait_semaphore (obj_desc->method.semaphore, - ACPI_WAIT_FOREVER); + status = + acpi_ex_system_wait_semaphore(obj_desc->method.semaphore, + ACPI_WAIT_FOREVER); + } + + /* + * Allocate an Owner ID for this method, only if this is the first thread + * to begin concurrent execution. We only need one owner_id, even if the + * method is invoked recursively. + */ + if (!obj_desc->method.owner_id) { + status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } } /* @@ -237,10 +260,9 @@ acpi_ds_begin_method_execution ( * reentered one more time (even if it is the same thread) */ obj_desc->method.thread_count++; - return_ACPI_STATUS (status); + return_ACPI_STATUS(status); } - /******************************************************************************* * * FUNCTION: acpi_ds_call_control_method @@ -256,101 +278,99 @@ acpi_ds_begin_method_execution ( ******************************************************************************/ acpi_status -acpi_ds_call_control_method ( - struct acpi_thread_state *thread, - struct acpi_walk_state *this_walk_state, - union acpi_parse_object *op) +acpi_ds_call_control_method(struct acpi_thread_state *thread, + struct acpi_walk_state *this_walk_state, + union acpi_parse_object *op) { - acpi_status status; - struct acpi_namespace_node *method_node; - struct acpi_walk_state *next_walk_state; - union acpi_operand_object *obj_desc; - struct acpi_parameter_info info; - u32 i; - + acpi_status status; + struct acpi_namespace_node *method_node; + struct acpi_walk_state *next_walk_state = NULL; + union acpi_operand_object *obj_desc; + struct acpi_parameter_info info; + u32 i; - ACPI_FUNCTION_TRACE_PTR ("ds_call_control_method", this_walk_state); + ACPI_FUNCTION_TRACE_PTR("ds_call_control_method", this_walk_state); - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n", - this_walk_state->prev_op, this_walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Execute method %p, currentstate=%p\n", + this_walk_state->prev_op, this_walk_state)); /* * Get the namespace entry for the control method we are about to call */ method_node = this_walk_state->method_call_node; if (!method_node) { - return_ACPI_STATUS (AE_NULL_ENTRY); + return_ACPI_STATUS(AE_NULL_ENTRY); } - obj_desc = acpi_ns_get_attached_object (method_node); + obj_desc = acpi_ns_get_attached_object(method_node); if (!obj_desc) { - return_ACPI_STATUS (AE_NULL_OBJECT); + return_ACPI_STATUS(AE_NULL_OBJECT); } - obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD); - /* Init for new method, wait on concurrency semaphore */ - status = acpi_ds_begin_method_execution (method_node, obj_desc, - this_walk_state->method_node); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); + status = acpi_ds_begin_method_execution(method_node, obj_desc, + this_walk_state->method_node); + if (ACPI_FAILURE(status)) { + goto cleanup; } if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) { /* 1) Parse: Create a new walk state for the preempting walk */ - next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id, - op, obj_desc, NULL); + next_walk_state = + acpi_ds_create_walk_state(obj_desc->method.owner_id, op, + obj_desc, NULL); if (!next_walk_state) { - return_ACPI_STATUS (AE_NO_MEMORY); + return_ACPI_STATUS(AE_NO_MEMORY); } /* Create and init a Root Node */ - op = acpi_ps_create_scope_op (); + op = acpi_ps_create_scope_op(); if (!op) { status = AE_NO_MEMORY; goto cleanup; } - status = acpi_ds_init_aml_walk (next_walk_state, op, method_node, - obj_desc->method.aml_start, obj_desc->method.aml_length, - NULL, 1); - if (ACPI_FAILURE (status)) { - acpi_ds_delete_walk_state (next_walk_state); + status = acpi_ds_init_aml_walk(next_walk_state, op, method_node, + obj_desc->method.aml_start, + obj_desc->method.aml_length, + NULL, 1); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(next_walk_state); goto cleanup; } /* Begin AML parse */ - status = acpi_ps_parse_aml (next_walk_state); - acpi_ps_delete_parse_tree (op); + status = acpi_ps_parse_aml(next_walk_state); + acpi_ps_delete_parse_tree(op); } /* 2) Execute: Create a new state for the preempting walk */ - next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id, - NULL, obj_desc, thread); + next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id, + NULL, obj_desc, thread); if (!next_walk_state) { status = AE_NO_MEMORY; goto cleanup; } /* * The resolved arguments were put on the previous walk state's operand - * stack. Operands on the previous walk state stack always - * start at index 0. - * Null terminate the list of arguments + * stack. Operands on the previous walk state stack always + * start at index 0. Also, null terminate the list of arguments */ - this_walk_state->operands [this_walk_state->num_operands] = NULL; + this_walk_state->operands[this_walk_state->num_operands] = NULL; info.parameters = &this_walk_state->operands[0]; info.parameter_type = ACPI_PARAM_ARGS; - status = acpi_ds_init_aml_walk (next_walk_state, NULL, method_node, - obj_desc->method.aml_start, obj_desc->method.aml_length, - &info, 3); - if (ACPI_FAILURE (status)) { + status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node, + obj_desc->method.aml_start, + obj_desc->method.aml_length, &info, 3); + if (ACPI_FAILURE(status)) { goto cleanup; } @@ -359,38 +379,37 @@ acpi_ds_call_control_method ( * (they were copied to new objects) */ for (i = 0; i < obj_desc->method.param_count; i++) { - acpi_ut_remove_reference (this_walk_state->operands [i]); - this_walk_state->operands [i] = NULL; + acpi_ut_remove_reference(this_walk_state->operands[i]); + this_walk_state->operands[i] = NULL; } /* Clear the operand stack */ this_walk_state->num_operands = 0; - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "Starting nested execution, newstate=%p\n", next_walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Starting nested execution, newstate=%p\n", + next_walk_state)); if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) { - status = obj_desc->method.implementation (next_walk_state); - return_ACPI_STATUS (status); + status = obj_desc->method.implementation(next_walk_state); } - return_ACPI_STATUS (AE_OK); - + return_ACPI_STATUS(status); - /* On error, we must delete the new walk state */ + cleanup: + /* Decrement the thread count on the method parse tree */ -cleanup: if (next_walk_state && (next_walk_state->method_desc)) { - /* Decrement the thread count on the method parse tree */ - - next_walk_state->method_desc->method.thread_count--; + next_walk_state->method_desc->method.thread_count--; } - (void) acpi_ds_terminate_control_method (next_walk_state); - acpi_ds_delete_walk_state (next_walk_state); - return_ACPI_STATUS (status); -} + /* On error, we must delete the new walk state */ + + acpi_ds_terminate_control_method(next_walk_state); + acpi_ds_delete_walk_state(next_walk_state); + return_ACPI_STATUS(status); +} /******************************************************************************* * @@ -407,25 +426,22 @@ cleanup: ******************************************************************************/ acpi_status -acpi_ds_restart_control_method ( - struct acpi_walk_state *walk_state, - union acpi_operand_object *return_desc) +acpi_ds_restart_control_method(struct acpi_walk_state *walk_state, + union acpi_operand_object *return_desc) { - acpi_status status; + acpi_status status; + ACPI_FUNCTION_TRACE_PTR("ds_restart_control_method", walk_state); - ACPI_FUNCTION_TRACE_PTR ("ds_restart_control_method", walk_state); + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "****Restart [%4.4s] Op %p return_value_from_callee %p\n", + (char *)&walk_state->method_node->name, + walk_state->method_call_op, return_desc)); - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "****Restart [%4.4s] Op %p return_value_from_callee %p\n", - (char *) &walk_state->method_node->name, walk_state->method_call_op, - return_desc)); - - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - " return_from_this_method_used?=%X res_stack %p Walk %p\n", - walk_state->return_used, - walk_state->results, walk_state)); + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + " return_from_this_method_used?=%X res_stack %p Walk %p\n", + walk_state->return_used, + walk_state->results, walk_state)); /* Did the called method return a value? */ @@ -435,10 +451,10 @@ acpi_ds_restart_control_method ( if (walk_state->return_used) { /* Save the return value from the previous method */ - status = acpi_ds_result_push (return_desc, walk_state); - if (ACPI_FAILURE (status)) { - acpi_ut_remove_reference (return_desc); - return_ACPI_STATUS (status); + status = acpi_ds_result_push(return_desc, walk_state); + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(return_desc); + return_ACPI_STATUS(status); } /* @@ -456,26 +472,26 @@ acpi_ds_restart_control_method ( * NOTE: this is optional because the ASL language does not actually * support this behavior. */ - else if (!acpi_ds_do_implicit_return (return_desc, walk_state, FALSE)) { + else if (!acpi_ds_do_implicit_return + (return_desc, walk_state, FALSE)) { /* * Delete the return value if it will not be used by the * calling method */ - acpi_ut_remove_reference (return_desc); + acpi_ut_remove_reference(return_desc); } } - return_ACPI_STATUS (AE_OK); + return_ACPI_STATUS(AE_OK); } - /******************************************************************************* * * FUNCTION: acpi_ds_terminate_control_method * * PARAMETERS: walk_state - State of the method * - * RETURN: Status + * RETURN: None * * DESCRIPTION: Terminate a control method. Delete everything that the method * created, delete all locals and arguments, and delete the parse @@ -483,63 +499,59 @@ acpi_ds_restart_control_method ( * ******************************************************************************/ -acpi_status -acpi_ds_terminate_control_method ( - struct acpi_walk_state *walk_state) +void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state) { - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *method_node; - acpi_status status; - - - ACPI_FUNCTION_TRACE_PTR ("ds_terminate_control_method", walk_state); + union acpi_operand_object *obj_desc; + struct acpi_namespace_node *method_node; + acpi_status status; + ACPI_FUNCTION_TRACE_PTR("ds_terminate_control_method", walk_state); if (!walk_state) { - return (AE_BAD_PARAMETER); + return_VOID; } /* The current method object was saved in the walk state */ obj_desc = walk_state->method_desc; if (!obj_desc) { - return_ACPI_STATUS (AE_OK); + return_VOID; } /* Delete all arguments and locals */ - acpi_ds_method_data_delete_all (walk_state); + acpi_ds_method_data_delete_all(walk_state); /* * Lock the parser while we terminate this method. * If this is the last thread executing the method, * we have additional cleanup to perform */ - status = acpi_ut_acquire_mutex (ACPI_MTX_PARSER); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); + status = acpi_ut_acquire_mutex(ACPI_MTX_PARSER); + if (ACPI_FAILURE(status)) { + return_VOID; } /* Signal completion of the execution of this method if necessary */ if (walk_state->method_desc->method.semaphore) { - status = acpi_os_signal_semaphore ( - walk_state->method_desc->method.semaphore, 1); - if (ACPI_FAILURE (status)) { - ACPI_REPORT_ERROR (("Could not signal method semaphore\n")); - status = AE_OK; + status = + acpi_os_signal_semaphore(walk_state->method_desc->method. + semaphore, 1); + if (ACPI_FAILURE(status)) { + ACPI_REPORT_ERROR(("Could not signal method semaphore\n")); /* Ignore error and continue cleanup */ } } if (walk_state->method_desc->method.thread_count) { - ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, - "*** Not deleting method namespace, there are still %d threads\n", - walk_state->method_desc->method.thread_count)); - } + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "*** Not deleting method namespace, there are still %d threads\n", + walk_state->method_desc->method. + thread_count)); + } else { /* This is the last executing thread */ - if (!walk_state->method_desc->method.thread_count) { /* * Support to dynamically change a method from not_serialized to * Serialized if it appears that the method is written foolishly and @@ -551,10 +563,11 @@ acpi_ds_terminate_control_method ( * before creating the synchronization semaphore. */ if ((walk_state->method_desc->method.concurrency == 1) && - (!walk_state->method_desc->method.semaphore)) { - status = acpi_os_create_semaphore (1, - 1, - &walk_state->method_desc->method.semaphore); + (!walk_state->method_desc->method.semaphore)) { + status = acpi_os_create_semaphore(1, 1, + &walk_state-> + method_desc->method. + semaphore); } /* @@ -569,28 +582,27 @@ acpi_ds_terminate_control_method ( * Delete any namespace entries created immediately underneath * the method */ - status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + goto exit; } if (method_node->child) { - acpi_ns_delete_namespace_subtree (method_node); + acpi_ns_delete_namespace_subtree(method_node); } /* * Delete any namespace entries created anywhere else within * the namespace */ - acpi_ns_delete_namespace_by_owner (walk_state->method_desc->method.owning_id); - status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } + acpi_ns_delete_namespace_by_owner(walk_state->method_desc-> + method.owner_id); + status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + acpi_ut_release_owner_id(&walk_state->method_desc->method. + owner_id); } - status = acpi_ut_release_mutex (ACPI_MTX_PARSER); - return_ACPI_STATUS (status); + exit: + (void)acpi_ut_release_mutex(ACPI_MTX_PARSER); + return_VOID; } - - |