Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * ACPI configfs support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2016 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define pr_fmt(fmt) "ACPI configfs: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/configfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "acpica/accommon.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "acpica/actables.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static struct config_group *acpi_table_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) struct acpi_table {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct config_item cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct acpi_table_header *header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	u32 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static ssize_t acpi_table_aml_write(struct config_item *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 				    const void *data, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	const struct acpi_table_header *header = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct acpi_table *table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	int ret = security_locked_down(LOCKDOWN_ACPI_TABLES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	table = container_of(cfg, struct acpi_table, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (table->header) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		pr_err("table already loaded\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (header->length != size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		pr_err("invalid table length\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (memcmp(header->signature, ACPI_SIG_SSDT, 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		pr_err("invalid table signature\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	table = container_of(cfg, struct acpi_table, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	table->header = kmemdup(header, header->length, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (!table->header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	ret = acpi_load_table(table->header, &table->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		kfree(table->header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		table->header = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static inline struct acpi_table_header *get_header(struct config_item *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	struct acpi_table *table = container_of(cfg, struct acpi_table, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if (!table->header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		pr_err("table not loaded\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	return table->header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static ssize_t acpi_table_aml_read(struct config_item *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				   void *data, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if (data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		memcpy(data, h, h->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	return h->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #define MAX_ACPI_TABLE_SIZE (128 * 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) CONFIGFS_BIN_ATTR(acpi_table_, aml, NULL, MAX_ACPI_TABLE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static struct configfs_bin_attribute *acpi_table_bin_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	&acpi_table_attr_aml,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static ssize_t acpi_table_signature_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return sprintf(str, "%.*s\n", ACPI_NAMESEG_SIZE, h->signature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static ssize_t acpi_table_length_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return sprintf(str, "%d\n", h->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static ssize_t acpi_table_revision_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	return sprintf(str, "%d\n", h->revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static ssize_t acpi_table_oem_id_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	return sprintf(str, "%.*s\n", ACPI_OEM_ID_SIZE, h->oem_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static ssize_t acpi_table_oem_table_id_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	return sprintf(str, "%.*s\n", ACPI_OEM_TABLE_ID_SIZE, h->oem_table_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static ssize_t acpi_table_oem_revision_show(struct config_item *cfg, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	return sprintf(str, "%d\n", h->oem_revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static ssize_t acpi_table_asl_compiler_id_show(struct config_item *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 					       char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	return sprintf(str, "%.*s\n", ACPI_NAMESEG_SIZE, h->asl_compiler_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static ssize_t acpi_table_asl_compiler_revision_show(struct config_item *cfg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 						     char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct acpi_table_header *h = get_header(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (!h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return sprintf(str, "%d\n", h->asl_compiler_revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) CONFIGFS_ATTR_RO(acpi_table_, signature);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) CONFIGFS_ATTR_RO(acpi_table_, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) CONFIGFS_ATTR_RO(acpi_table_, revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) CONFIGFS_ATTR_RO(acpi_table_, oem_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) CONFIGFS_ATTR_RO(acpi_table_, oem_table_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) CONFIGFS_ATTR_RO(acpi_table_, oem_revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) CONFIGFS_ATTR_RO(acpi_table_, asl_compiler_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) CONFIGFS_ATTR_RO(acpi_table_, asl_compiler_revision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static struct configfs_attribute *acpi_table_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	&acpi_table_attr_signature,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	&acpi_table_attr_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	&acpi_table_attr_revision,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	&acpi_table_attr_oem_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	&acpi_table_attr_oem_table_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	&acpi_table_attr_oem_revision,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	&acpi_table_attr_asl_compiler_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	&acpi_table_attr_asl_compiler_revision,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static const struct config_item_type acpi_table_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.ct_owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.ct_bin_attrs = acpi_table_bin_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	.ct_attrs = acpi_table_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static struct config_item *acpi_table_make_item(struct config_group *group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 						const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct acpi_table *table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	table = kzalloc(sizeof(*table), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (!table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	config_item_init_type_name(&table->cfg, name, &acpi_table_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return &table->cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static void acpi_table_drop_item(struct config_group *group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 				 struct config_item *cfg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	struct acpi_table *table = container_of(cfg, struct acpi_table, cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	ACPI_INFO(("Host-directed Dynamic ACPI Table Unload"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	acpi_unload_table(table->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	config_item_put(cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static struct configfs_group_operations acpi_table_group_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	.make_item = acpi_table_make_item,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	.drop_item = acpi_table_drop_item,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static const struct config_item_type acpi_tables_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.ct_owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	.ct_group_ops = &acpi_table_group_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static const struct config_item_type acpi_root_group_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	.ct_owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static struct configfs_subsystem acpi_configfs = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	.su_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		.cg_item = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			.ci_namebuf = "acpi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			.ci_type = &acpi_root_group_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	.su_mutex = __MUTEX_INITIALIZER(acpi_configfs.su_mutex),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int __init acpi_configfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	struct config_group *root = &acpi_configfs.su_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	config_group_init(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	ret = configfs_register_subsystem(&acpi_configfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	acpi_table_group = configfs_register_default_group(root, "table",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 							   &acpi_tables_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (IS_ERR(acpi_table_group)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		configfs_unregister_subsystem(&acpi_configfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		return PTR_ERR(acpi_table_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) module_init(acpi_configfs_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static void __exit acpi_configfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	configfs_unregister_default_group(acpi_table_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	configfs_unregister_subsystem(&acpi_configfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) module_exit(acpi_configfs_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) MODULE_AUTHOR("Octavian Purdila <octavian.purdila@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) MODULE_DESCRIPTION("ACPI configfs support");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) MODULE_LICENSE("GPL v2");