diff options
Diffstat (limited to 'drivers/acpi/namespace/nsalloc.c')
| -rw-r--r-- | drivers/acpi/namespace/nsalloc.c | 350 |
1 files changed, 101 insertions, 249 deletions
diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c index 5653a19d7172..cc7a85f8cfe6 100644 --- a/drivers/acpi/namespace/nsalloc.c +++ b/drivers/acpi/namespace/nsalloc.c @@ -41,20 +41,14 @@ * POSSIBILITY OF SUCH DAMAGES. */ - #include <acpi/acpi.h> #include <acpi/acnamesp.h> - #define _COMPONENT ACPI_NAMESPACE - ACPI_MODULE_NAME ("nsalloc") +ACPI_MODULE_NAME("nsalloc") /* Local prototypes */ - -static void -acpi_ns_remove_reference ( - struct acpi_namespace_node *node); - +static void acpi_ns_remove_reference(struct acpi_namespace_node *node); /******************************************************************************* * @@ -68,31 +62,26 @@ acpi_ns_remove_reference ( * ******************************************************************************/ -struct acpi_namespace_node * -acpi_ns_create_node ( - u32 name) +struct acpi_namespace_node *acpi_ns_create_node(u32 name) { - struct acpi_namespace_node *node; - + struct acpi_namespace_node *node; - ACPI_FUNCTION_TRACE ("ns_create_node"); + ACPI_FUNCTION_TRACE("ns_create_node"); - - node = ACPI_MEM_CALLOCATE (sizeof (struct acpi_namespace_node)); + node = ACPI_MEM_CALLOCATE(sizeof(struct acpi_namespace_node)); if (!node) { - return_PTR (NULL); + return_PTR(NULL); } - ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_allocated++); + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_allocated++); - node->name.integer = name; + node->name.integer = name; node->reference_count = 1; - ACPI_SET_DESCRIPTOR_TYPE (node, ACPI_DESC_TYPE_NAMED); + ACPI_SET_DESCRIPTOR_TYPE(node, ACPI_DESC_TYPE_NAMED); - return_PTR (node); + return_PTR(node); } - /******************************************************************************* * * FUNCTION: acpi_ns_delete_node @@ -105,19 +94,15 @@ acpi_ns_create_node ( * ******************************************************************************/ -void -acpi_ns_delete_node ( - struct acpi_namespace_node *node) +void acpi_ns_delete_node(struct acpi_namespace_node *node) { - struct acpi_namespace_node *parent_node; - struct acpi_namespace_node *prev_node; - struct acpi_namespace_node *next_node; - + struct acpi_namespace_node *parent_node; + struct acpi_namespace_node *prev_node; + struct acpi_namespace_node *next_node; - ACPI_FUNCTION_TRACE_PTR ("ns_delete_node", node); + ACPI_FUNCTION_TRACE_PTR("ns_delete_node", node); - - parent_node = acpi_ns_get_parent_node (node); + parent_node = acpi_ns_get_parent_node(node); prev_node = NULL; next_node = parent_node->child; @@ -136,32 +121,29 @@ acpi_ns_delete_node ( if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { prev_node->flags |= ANOBJ_END_OF_PEER_LIST; } - } - else { + } else { /* Node is first child (has no previous peer) */ if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { /* No peers at all */ parent_node->child = NULL; - } - else { /* Link peer list to parent */ + } else { /* Link peer list to parent */ parent_node->child = next_node->peer; } } - ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_freed++); + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); /* * Detach an object if there is one then delete the node */ - acpi_ns_detach_object (node); - ACPI_MEM_FREE (node); + acpi_ns_detach_object(node); + ACPI_MEM_FREE(node); return_VOID; } - /******************************************************************************* * * FUNCTION: acpi_ns_install_node @@ -176,30 +158,20 @@ acpi_ns_delete_node ( * DESCRIPTION: Initialize a new namespace node and install it amongst * its peers. * - * Note: Current namespace lookup is linear search. However, the - * nodes are linked in alphabetical order to 1) put all reserved - * names (start with underscore) first, and to 2) make a readable - * namespace dump. + * Note: Current namespace lookup is linear search. This appears + * to be sufficient as namespace searches consume only a small + * fraction of the execution time of the ACPI subsystem. * ******************************************************************************/ -void -acpi_ns_install_node ( - struct acpi_walk_state *walk_state, - struct acpi_namespace_node *parent_node, /* Parent */ - struct acpi_namespace_node *node, /* New Child*/ - acpi_object_type type) +void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namespace_node *parent_node, /* Parent */ + struct acpi_namespace_node *node, /* New Child */ + acpi_object_type type) { - u16 owner_id = 0; - struct acpi_namespace_node *child_node; -#ifdef ACPI_ALPHABETIC_NAMESPACE - - struct acpi_namespace_node *previous_child_node; -#endif - - - ACPI_FUNCTION_TRACE ("ns_install_node"); + acpi_owner_id owner_id = 0; + struct acpi_namespace_node *child_node; + ACPI_FUNCTION_TRACE("ns_install_node"); /* * Get the owner ID from the Walk state @@ -217,59 +189,7 @@ acpi_ns_install_node ( parent_node->child = node; node->flags |= ANOBJ_END_OF_PEER_LIST; node->peer = parent_node; - } - else { -#ifdef ACPI_ALPHABETIC_NAMESPACE - /* - * Walk the list whilst searching for the correct - * alphabetic placement. - */ - previous_child_node = NULL; - while (acpi_ns_compare_names (acpi_ut_get_node_name (child_node), - acpi_ut_get_node_name (node)) < 0) { - if (child_node->flags & ANOBJ_END_OF_PEER_LIST) { - /* Last peer; Clear end-of-list flag */ - - child_node->flags &= ~ANOBJ_END_OF_PEER_LIST; - - /* This node is the new peer to the child node */ - - child_node->peer = node; - - /* This node is the new end-of-list */ - - node->flags |= ANOBJ_END_OF_PEER_LIST; - node->peer = parent_node; - break; - } - - /* Get next peer */ - - previous_child_node = child_node; - child_node = child_node->peer; - } - - /* Did the node get inserted at the end-of-list? */ - - if (!(node->flags & ANOBJ_END_OF_PEER_LIST)) { - /* - * Loop above terminated without reaching the end-of-list. - * Insert the new node at the current location - */ - if (previous_child_node) { - /* Insert node alphabetically */ - - node->peer = child_node; - previous_child_node->peer = node; - } - else { - /* Insert node alphabetically at start of list */ - - node->peer = child_node; - parent_node->child = node; - } - } -#else + } else { while (!(child_node->flags & ANOBJ_END_OF_PEER_LIST)) { child_node = child_node->peer; } @@ -279,9 +199,8 @@ acpi_ns_install_node ( /* Clear end-of-list flag */ child_node->flags &= ~ANOBJ_END_OF_PEER_LIST; - node->flags |= ANOBJ_END_OF_PEER_LIST; + node->flags |= ANOBJ_END_OF_PEER_LIST; node->peer = parent_node; -#endif } /* Init the new entry */ @@ -289,24 +208,25 @@ acpi_ns_install_node ( node->owner_id = owner_id; node->type = (u8) type; - ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, - "%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n", - acpi_ut_get_node_name (node), acpi_ut_get_type_name (node->type), node, owner_id, - acpi_ut_get_node_name (parent_node), acpi_ut_get_type_name (parent_node->type), - parent_node)); + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n", + acpi_ut_get_node_name(node), + acpi_ut_get_type_name(node->type), node, owner_id, + acpi_ut_get_node_name(parent_node), + acpi_ut_get_type_name(parent_node->type), + parent_node)); /* * Increment the reference count(s) of all parents up to * the root! */ - while ((node = acpi_ns_get_parent_node (node)) != NULL) { + while ((node = acpi_ns_get_parent_node(node)) != NULL) { node->reference_count++; } return_VOID; } - /******************************************************************************* * * FUNCTION: acpi_ns_delete_children @@ -320,18 +240,14 @@ acpi_ns_install_node ( * ******************************************************************************/ -void -acpi_ns_delete_children ( - struct acpi_namespace_node *parent_node) +void acpi_ns_delete_children(struct acpi_namespace_node *parent_node) { - struct acpi_namespace_node *child_node; - struct acpi_namespace_node *next_node; - struct acpi_namespace_node *node; - u8 flags; - - - ACPI_FUNCTION_TRACE_PTR ("ns_delete_children", parent_node); + struct acpi_namespace_node *child_node; + struct acpi_namespace_node *next_node; + struct acpi_namespace_node *node; + u8 flags; + ACPI_FUNCTION_TRACE_PTR("ns_delete_children", parent_node); if (!parent_node) { return_VOID; @@ -350,48 +266,48 @@ acpi_ns_delete_children ( do { /* Get the things we need */ - next_node = child_node->peer; - flags = child_node->flags; + next_node = child_node->peer; + flags = child_node->flags; /* Grandchildren should have all been deleted already */ if (child_node->child) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Found a grandchild! P=%p C=%p\n", - parent_node, child_node)); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Found a grandchild! P=%p C=%p\n", + parent_node, child_node)); } /* Now we can free this child object */ - ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_freed++); + ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); - ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Object %p, Remaining %X\n", - child_node, acpi_gbl_current_node_count)); + ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, + "Object %p, Remaining %X\n", child_node, + acpi_gbl_current_node_count)); /* * Detach an object if there is one, then free the child node */ - acpi_ns_detach_object (child_node); + acpi_ns_detach_object(child_node); /* * Decrement the reference count(s) of all parents up to * the root! (counts were incremented when the node was created) */ node = child_node; - while ((node = acpi_ns_get_parent_node (node)) != NULL) { + while ((node = acpi_ns_get_parent_node(node)) != NULL) { node->reference_count--; } /* There should be only one reference remaining on this node */ if (child_node->reference_count != 1) { - ACPI_REPORT_WARNING (( - "Existing references (%d) on node being deleted (%p)\n", - child_node->reference_count, child_node)); + ACPI_REPORT_WARNING(("Existing references (%d) on node being deleted (%p)\n", child_node->reference_count, child_node)); } /* Now we can delete the node */ - ACPI_MEM_FREE (child_node); + ACPI_MEM_FREE(child_node); /* And move on to the next child in the list */ @@ -399,7 +315,6 @@ acpi_ns_delete_children ( } while (!(flags & ANOBJ_END_OF_PEER_LIST)); - /* Clear the parent's child pointer */ parent_node->child = NULL; @@ -407,7 +322,6 @@ acpi_ns_delete_children ( return_VOID; } - /******************************************************************************* * * FUNCTION: acpi_ns_delete_namespace_subtree @@ -421,16 +335,12 @@ acpi_ns_delete_children ( * ******************************************************************************/ -void -acpi_ns_delete_namespace_subtree ( - struct acpi_namespace_node *parent_node) +void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node) { - struct acpi_namespace_node *child_node = NULL; - u32 level = 1; - - - ACPI_FUNCTION_TRACE ("ns_delete_namespace_subtree"); + struct acpi_namespace_node *child_node = NULL; + u32 level = 1; + ACPI_FUNCTION_TRACE("ns_delete_namespace_subtree"); if (!parent_node) { return_VOID; @@ -443,16 +353,17 @@ acpi_ns_delete_namespace_subtree ( while (level > 0) { /* Get the next node in this scope (NULL if none) */ - child_node = acpi_ns_get_next_node (ACPI_TYPE_ANY, parent_node, - child_node); + child_node = acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, + child_node); if (child_node) { /* Found a child node - detach any attached object */ - acpi_ns_detach_object (child_node); + acpi_ns_detach_object(child_node); /* Check if this node has any children */ - if (acpi_ns_get_next_node (ACPI_TYPE_ANY, child_node, NULL)) { + if (acpi_ns_get_next_node + (ACPI_TYPE_ANY, child_node, NULL)) { /* * There is at least one child of this node, * visit the node @@ -461,8 +372,7 @@ acpi_ns_delete_namespace_subtree ( parent_node = child_node; child_node = NULL; } - } - else { + } else { /* * No more children of this parent node. * Move up to the grandparent. @@ -473,7 +383,7 @@ acpi_ns_delete_namespace_subtree ( * Now delete all of the children of this parent * all at the same time. */ - acpi_ns_delete_children (parent_node); + acpi_ns_delete_children(parent_node); /* New "last child" is this parent node */ @@ -481,14 +391,13 @@ acpi_ns_delete_namespace_subtree ( /* Move up the tree to the grandparent */ - parent_node = acpi_ns_get_parent_node (parent_node); + parent_node = acpi_ns_get_parent_node(parent_node); } } return_VOID; } - /******************************************************************************* * * FUNCTION: acpi_ns_remove_reference @@ -504,16 +413,12 @@ acpi_ns_delete_namespace_subtree ( * ******************************************************************************/ -static void -acpi_ns_remove_reference ( - struct acpi_namespace_node *node) +static void acpi_ns_remove_reference(struct acpi_namespace_node *node) { - struct acpi_namespace_node *parent_node; - struct acpi_namespace_node *this_node; - - - ACPI_FUNCTION_ENTRY (); + struct acpi_namespace_node *parent_node; + struct acpi_namespace_node *this_node; + ACPI_FUNCTION_ENTRY(); /* * Decrement the reference count(s) of this node and all @@ -523,7 +428,7 @@ acpi_ns_remove_reference ( while (this_node) { /* Prepare to move up to parent */ - parent_node = acpi_ns_get_parent_node (this_node); + parent_node = acpi_ns_get_parent_node(this_node); /* Decrement the reference count on this node */ @@ -534,15 +439,14 @@ acpi_ns_remove_reference ( if (!this_node->reference_count) { /* Delete all children and delete the node */ - acpi_ns_delete_children (this_node); - acpi_ns_delete_node (this_node); + acpi_ns_delete_children(this_node); + acpi_ns_delete_node(this_node); } this_node = parent_node; } } - /******************************************************************************* * * FUNCTION: acpi_ns_delete_namespace_by_owner @@ -557,23 +461,23 @@ acpi_ns_remove_reference ( * ******************************************************************************/ -void -acpi_ns_delete_namespace_by_owner ( - u16 owner_id) +void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id) { - struct acpi_namespace_node *child_node; - struct acpi_namespace_node *deletion_node; - u32 level; - struct acpi_namespace_node *parent_node; - + struct acpi_namespace_node *child_node; + struct acpi_namespace_node *deletion_node; + u32 level; + struct acpi_namespace_node *parent_node; - ACPI_FUNCTION_TRACE_U32 ("ns_delete_namespace_by_owner", owner_id); + ACPI_FUNCTION_TRACE_U32("ns_delete_namespace_by_owner", owner_id); + if (owner_id == 0) { + return_VOID; + } - parent_node = acpi_gbl_root_node; - child_node = NULL; + parent_node = acpi_gbl_root_node; + child_node = NULL; deletion_node = NULL; - level = 1; + level = 1; /* * Traverse the tree of nodes until we bubble back up @@ -584,10 +488,12 @@ acpi_ns_delete_namespace_by_owner ( * Get the next child of this parent node. When child_node is NULL, * the first child of the parent is returned */ - child_node = acpi_ns_get_next_node (ACPI_TYPE_ANY, parent_node, child_node); + child_node = + acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, + child_node); if (deletion_node) { - acpi_ns_remove_reference (deletion_node); + acpi_ns_remove_reference(deletion_node); deletion_node = NULL; } @@ -595,12 +501,13 @@ acpi_ns_delete_namespace_by_owner ( if (child_node->owner_id == owner_id) { /* Found a matching child node - detach any attached object */ - acpi_ns_detach_object (child_node); + acpi_ns_detach_object(child_node); } /* Check if this node has any children */ - if (acpi_ns_get_next_node (ACPI_TYPE_ANY, child_node, NULL)) { + if (acpi_ns_get_next_node + (ACPI_TYPE_ANY, child_node, NULL)) { /* * There is at least one child of this node, * visit the node @@ -608,12 +515,10 @@ acpi_ns_delete_namespace_by_owner ( level++; parent_node = child_node; child_node = NULL; - } - else if (child_node->owner_id == owner_id) { + } else if (child_node->owner_id == owner_id) { deletion_node = child_node; } - } - else { + } else { /* * No more children of this parent node. * Move up to the grandparent. @@ -631,62 +536,9 @@ acpi_ns_delete_namespace_by_owner ( /* Move up the tree to the grandparent */ - parent_node = acpi_ns_get_parent_node (parent_node); + parent_node = acpi_ns_get_parent_node(parent_node); } } return_VOID; } - - -#ifdef ACPI_ALPHABETIC_NAMESPACE -/******************************************************************************* - * - * FUNCTION: acpi_ns_compare_names - * - * PARAMETERS: Name1 - First name to compare - * Name2 - Second name to compare - * - * RETURN: value from strncmp - * - * DESCRIPTION: Compare two ACPI names. Names that are prefixed with an - * underscore are forced to be alphabetically first. - * - ******************************************************************************/ - -int -acpi_ns_compare_names ( - char *name1, - char *name2) -{ - char reversed_name1[ACPI_NAME_SIZE]; - char reversed_name2[ACPI_NAME_SIZE]; - u32 i; - u32 j; - - - /* - * Replace all instances of "underscore" with a value that is smaller so - * that all names that are prefixed with underscore(s) are alphabetically - * first. - * - * Reverse the name bytewise so we can just do a 32-bit compare instead - * of a strncmp. - */ - for (i = 0, j= (ACPI_NAME_SIZE - 1); i < ACPI_NAME_SIZE; i++, j--) { - reversed_name1[j] = name1[i]; - if (name1[i] == '_') { - reversed_name1[j] = '*'; - } - - reversed_name2[j] = name2[i]; - if (name2[i] == '_') { - reversed_name2[j] = '*'; - } - } - - return (*(int *) reversed_name1 - *(int *) reversed_name2); -} -#endif - - |