^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* sfi_acpi.c Simple Firmware Interface - ACPI extensions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) This file is provided under a dual BSD/GPLv2 license. When using or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) redistributing this file, you may do so under either license.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) GPL LICENSE SUMMARY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Copyright(c) 2009 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) This program is free software; you can redistribute it and/or modify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) it under the terms of version 2 of the GNU General Public License as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) You should have received a copy of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) along with this program; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) The full GNU General Public License is included in this distribution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) in the file called LICENSE.GPL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) BSD LICENSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Copyright(c) 2009 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) notice, this list of conditions and the following disclaimer in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) the documentation and/or other materials provided with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * Neither the name of Intel Corporation nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) contributors may be used to endorse or promote products derived
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) from this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define KMSG_COMPONENT "SFI"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <linux/sfi_acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include "sfi_core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * SFI can access ACPI-defined tables via an optional ACPI XSDT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * This allows re-use, and avoids re-definition, of standard tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * For example, the "MCFG" table is defined by PCI, reserved by ACPI,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * and is expected to be present many SFI-only systems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static struct acpi_table_xsdt *xsdt_va __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define XSDT_GET_NUM_ENTRIES(ptable, entry_type) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ((ptable->header.length - sizeof(struct acpi_table_header)) / \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) (sizeof(entry_type)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static inline struct sfi_table_header *acpi_to_sfi_th(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct acpi_table_header *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return (struct sfi_table_header *)th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static inline struct acpi_table_header *sfi_to_acpi_th(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct sfi_table_header *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return (struct acpi_table_header *)th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^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) * sfi_acpi_parse_xsdt()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * Parse the ACPI XSDT for later access by sfi_acpi_table_parse().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static int __init sfi_acpi_parse_xsdt(struct sfi_table_header *th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct sfi_table_key key = SFI_ANY_KEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int tbl_cnt, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) void *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) xsdt_va = (struct acpi_table_xsdt *)th;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) for (i = 0; i < tbl_cnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ret = sfi_check_table(xsdt_va->table_offset_entry[i], &key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (IS_ERR(ret)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) disable_sfi();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return -1;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int __init sfi_acpi_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct sfi_table_key xsdt_key = { .sig = SFI_SIG_XSDT };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) sfi_table_parse(SFI_SIG_XSDT, NULL, NULL, sfi_acpi_parse_xsdt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* Only call the get_table to keep the table mapped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) xsdt_va = (struct acpi_table_xsdt *)sfi_get_table(&xsdt_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static struct acpi_table_header *sfi_acpi_get_table(struct sfi_table_key *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) u32 tbl_cnt, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) void *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) for (i = 0; i < tbl_cnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ret = sfi_check_table(xsdt_va->table_offset_entry[i], key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (!IS_ERR(ret) && ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return sfi_to_acpi_th(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return NULL;
^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 void sfi_acpi_put_table(struct acpi_table_header *table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) sfi_put_table(acpi_to_sfi_th(table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * sfi_acpi_table_parse()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * Find specified table in XSDT, run handler on it and return its return value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int sfi_acpi_table_parse(char *signature, char *oem_id, char *oem_table_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) int(*handler)(struct acpi_table_header *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct acpi_table_header *table = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct sfi_table_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (sfi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) key.sig = signature;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) key.oem_id = oem_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) key.oem_table_id = oem_table_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) table = sfi_acpi_get_table(&key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (!table)
^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) ret = handler(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) sfi_acpi_put_table(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static ssize_t sfi_acpi_table_show(struct file *filp, struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct bin_attribute *bin_attr, char *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) loff_t offset, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct sfi_table_attr *tbl_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) container_of(bin_attr, struct sfi_table_attr, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct acpi_table_header *th = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct sfi_table_key key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ssize_t cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) key.sig = tbl_attr->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) key.oem_id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) key.oem_table_id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) th = sfi_acpi_get_table(&key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (!th)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) cnt = memory_read_from_buffer(buf, count, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) th, th->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) sfi_acpi_put_table(th);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) void __init sfi_acpi_sysfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) u32 tbl_cnt, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct sfi_table_attr *tbl_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) for (i = 0; i < tbl_cnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) tbl_attr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) sfi_sysfs_install_table(xsdt_va->table_offset_entry[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) tbl_attr->attr.read = sfi_acpi_table_show;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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