1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  fw_tables.c - Parsing support for ACPI and ACPI-like tables provided by
33 	switch (entry->type) {  in acpi_get_entry_type()
35 		return entry->hdr->common.type;  in acpi_get_entry_type()
37 		return entry->hdr->hmat.type;  in acpi_get_entry_type()
41 		return entry->hdr->cedt.type;  in acpi_get_entry_type()
43 		return entry->hdr->cdat.type;  in acpi_get_entry_type()
51 	switch (entry->type) {  in acpi_get_entry_length()
53 		return entry->hdr->common.length;  in acpi_get_entry_length()
55 		return entry->hdr->hmat.length;  in acpi_get_entry_length()
57 		return entry->hdr->prmt.length;  in acpi_get_entry_length()
59 		return entry->hdr->cedt.length;  in acpi_get_entry_length()
61 		__le16 length = (__force __le16)entry->hdr->cdat.length;  in acpi_get_entry_length()
72 	switch (entry->type) {  in acpi_get_subtable_header_length()
74 		return sizeof(entry->hdr->common);  in acpi_get_subtable_header_length()
76 		return sizeof(entry->hdr->hmat);  in acpi_get_subtable_header_length()
78 		return sizeof(entry->hdr->prmt);  in acpi_get_subtable_header_length()
80 		return sizeof(entry->hdr->cedt);  in acpi_get_subtable_header_length()
82 		return sizeof(entry->hdr->cdat);  in acpi_get_subtable_header_length()
88 acpi_get_subtable_type(char *id)  in acpi_get_subtable_type()  argument
90 	if (strncmp(id, ACPI_SIG_HMAT, 4) == 0)  in acpi_get_subtable_type()
92 	if (strncmp(id, ACPI_SIG_PRMT, 4) == 0)  in acpi_get_subtable_type()
94 	if (strncmp(id, ACPI_SIG_CEDT, 4) == 0)  in acpi_get_subtable_type()
96 	if (strncmp(id, ACPI_SIG_CDAT, 4) == 0)  in acpi_get_subtable_type()
106 		__le32 length = (__force __le32)header->cdat.length;  in acpi_table_get_length()
111 	return header->acpi.length;  in acpi_table_get_length()
114 static __init_or_fwtbl_lib int call_handler(struct acpi_subtable_proc *proc,  in call_handler()  argument
118 	if (proc->handler)  in call_handler()
119 		return proc->handler(hdr, end);  in call_handler()
120 	if (proc->handler_arg)  in call_handler()
121 		return proc->handler_arg(hdr, proc->arg, end);  in call_handler()
122 	return -EINVAL;  in call_handler()
126  * acpi_parse_entries_array - for each proc_num find a suitable subtable
128  * @id: table id (for debugging purposes)
132  * @proc: array of acpi_subtable_proc struct containing entry id
134  * @proc_num: how big proc is?
137  * For each proc_num find a subtable with proc->id and run proc->handler
139  * entry id.
146  * On success returns sum of all matching entries for all proc handlers.
147  * Otherwise, -ENODEV or -EINVAL is returned.
150 acpi_parse_entries_array(char *id, unsigned long table_size,  in acpi_parse_entries_array()  argument
153 			 struct acpi_subtable_proc *proc,  in acpi_parse_entries_array()  argument
162 	type = acpi_get_subtable_type(id);  in acpi_parse_entries_array()
177 			if (acpi_get_entry_type(&entry) != proc[i].id)  in acpi_parse_entries_array()
181 				if (call_handler(&proc[i], entry.hdr, table_end))  in acpi_parse_entries_array()
182 					return -EINVAL;  in acpi_parse_entries_array()
184 			proc[i].count++;  in acpi_parse_entries_array()
190 		 * If entry->length is 0, break from this loop to avoid  in acpi_parse_entries_array()
195 			pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);  in acpi_parse_entries_array()
196 			return -EINVAL;  in acpi_parse_entries_array()
205 			id, proc->id, count - max_entries, count);  in acpi_parse_entries_array()
218 	struct acpi_subtable_proc proc = {  in cdat_table_parse()  local
219 		.id		= type,  in cdat_table_parse()
225 		return -EINVAL;  in cdat_table_parse()
230 					length, &proc, 1, 0);  in cdat_table_parse()