tools/power/acpi/acpidump: version 20101221 - find dynamic tables in sysfs

This is unchanged version 20101221, plus a small bit in
DEFINE_ALTERNATE_TYPES to enable building with latest kernel headers.

This version finds dynamic tables exported by Linux in
/sys/firmware/acpi/tables/dynamic

Signed-off-by: Yakui Zhao <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 89 insertions, 98 deletions

diff --git a/tools/power/acpi/acpidump.c b/tools/power/acpi/acpidump.c
index a63dee960311..07779871421c 100644
--- a/tools/power/acpi/acpidump.c
+++ b/tools/power/acpi/acpidump.c
@@ -1,6 +1,5 @@
 /*
  * (c) Alexey Starikovskiy, Intel, 2005-2006.
- * (c) Len Brown, Intel, 2007.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -63,6 +62,8 @@ typedef long long			s64;
 #include <unistd.h>
 #include <getopt.h>
 
+#include <sys/types.h>
+#include <dirent.h>
 
 #include <acpi/acconfig.h>
 #include <acpi/platform/acenv.h>
@@ -186,40 +187,6 @@ static void acpi_show_data(int fd, u8 * data, int size)
 /*
  * Output ACPI table
  */
-
-#define MAX_TABLES 128
-int next_table_dump;
-u64 dumped_tables[MAX_TABLES];
-
-void
-set_table_dumped(u64 address) {
-        if (next_table_dump >= MAX_TABLES) {
-                printf("increase MAX_TABLES\n");
-                exit(1);
-        }
-        dumped_tables[next_table_dump++] = address;
-}
-
-/*
- * list the tables as they are dumped
- * check the list so that they are not dumped twice.
- *
- * this is needed because we follow both the XSDT and RSDT
- * which generally point to all duplicate tables
- * except the FADT
- */
-int
-check_table_dumped(u64 address) {
-        int i;
-
-        for (i = 0; i < MAX_TABLES; ++i) {
-                if (address == dumped_tables[i])
-                        return 1;
-                if (dumped_tables[i] == 0)
-                        return 0;
-        }
-        return 0;
-}
 static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned long addr)
 {
         char buff[80];
@@ -233,10 +200,6 @@ static void acpi_show_table(int fd, struct acpi_table_header *table, unsigned lo
 static void write_table(int fd, struct acpi_table_header *tbl, unsigned long addr)
 {
         static int select_done = 0;
-
-        if (check_table_dumped((u64)addr))
-                return;
-
         if (!select_sig[0]) {
                 if (print) {
                         acpi_show_table(fd, tbl, addr);
@@ -255,7 +218,6 @@ static void write_table(int fd, struct acpi_table_header *tbl, unsigned long add
                 }
                 select_done = 1;
         }
-        set_table_dumped((u64) addr);
 }
 
 static void acpi_dump_FADT(int fd, struct acpi_table_header *tbl, unsigned long xaddr) {
@@ -312,26 +274,30 @@ no_facs:
         write_table(fd, (struct acpi_table_header *)&x, xaddr);
 }
 
-
-static int acpi_dump_RSDT(int fd, struct acpi_rsdp_descriptor *rsdp)
+static int acpi_dump_SDT(int fd, struct acpi_rsdp_descriptor *rsdp)
 {
         struct acpi_table_header *sdt, *tbl = 0;
-        int i, num;
+        int xsdt = 1, i, num;
         char *offset;
         unsigned long addr;
-
-        tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
+        if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
+                tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
+        }
+        if (!tbl && rsdp->rsdt_physical_address) {
+                xsdt = 0;
+                tbl = acpi_map_table(rsdp->rsdt_physical_address, "RSDT");
+        }
         if (!tbl) return 0;
-
         sdt = malloc(tbl->length);
         memcpy(sdt, tbl, tbl->length);
         acpi_unmap_table(tbl);
         if (checksum((u8 *)sdt, sdt->length))
-                fprintf(stderr, "Wrong checksum for %s!\n", "RSDT");
-        num = (sdt->length - sizeof(struct acpi_table_header))/sizeof(u32);
+                fprintf(stderr, "Wrong checksum for %s!\n", (xsdt)?"XSDT":"RSDT");
+        num = (sdt->length - sizeof(struct acpi_table_header))/((xsdt)?sizeof(u64):sizeof(u32));
         offset = (char *)sdt + sizeof(struct acpi_table_header);
-        for (i = 0; i < num; ++i, offset += sizeof(u32)) {
-                addr = (unsigned long)(*(u32 *)offset);
+        for (i = 0; i < num; ++i, offset += ((xsdt) ? sizeof(u64) : sizeof(u32))) {
+                addr = (xsdt) ? (unsigned long)(*(u64 *)offset):
+                                (unsigned long)(*(u32 *)offset);
                 if (!addr) continue;
                 tbl = acpi_map_table(addr, 0);
                 if (!tbl) continue;
@@ -339,66 +305,92 @@ static int acpi_dump_RSDT(int fd, struct acpi_rsdp_descriptor *rsdp)
                         acpi_dump_FADT(fd, tbl, addr);
                 } else {
                         if (checksum((u8 *)tbl, tbl->length))
-                                fprintf(stderr, "Wrong checksum for %.4s!\n", tbl->signature);
+                                fprintf(stderr, "Wrong checksum for generic table!\n");
                         write_table(fd, tbl, addr);
                 }
                 acpi_unmap_table(tbl);
                 if (connect) {
-                        (*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
+                        if (xsdt)
+                                (*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
+                        else
+                                (*(u32*)offset) = lseek(fd, 0, SEEK_CUR);
                 }
         }
-        addr = (unsigned long)rsdp->rsdt_physical_address;
-        if (connect) {
-                rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
+        if (xsdt) {
+                addr = (unsigned long)rsdp->xsdt_physical_address;
+                if (connect) {
+                        rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
+                }
+        } else {
+                addr = (unsigned long)rsdp->rsdt_physical_address;
+                if (connect) {
+                        rsdp->rsdt_physical_address = lseek(fd, 0, SEEK_CUR);
+                }
         }
         write_table(fd, sdt, addr);
         free (sdt);
         return 1;
 }
 
+#define DYNAMIC_SSDT    "/sys/firmware/acpi/tables/dynamic"
 
-static int acpi_dump_XSDT(int fd, struct acpi_rsdp_descriptor *rsdp)
+static void acpi_dump_dynamic_SSDT(int fd)
 {
-        struct acpi_table_header *sdt, *tbl = 0;
-        int i, num;
-        char *offset;
-        unsigned long addr;
-        if (rsdp->revision > 1 && rsdp->xsdt_physical_address) {
-                tbl = acpi_map_table(rsdp->xsdt_physical_address, "XSDT");
+        struct stat file_stat;
+        char filename[256], *ptr;
+        DIR *tabledir;
+        struct dirent *entry;
+        FILE *fp;
+        int count, readcount, length;
+        struct acpi_table_header table_header, *ptable;
+
+        if (stat(DYNAMIC_SSDT, &file_stat) == -1) {
+                /* The directory doesn't exist */
+                return;
         }
-        if (!tbl) return 0;
-
-        sdt = malloc(tbl->length);
-        memcpy(sdt, tbl, tbl->length);
-        acpi_unmap_table(tbl);
-        if (checksum((u8 *)sdt, sdt->length))
-                fprintf(stderr, "Wrong checksum for %s!\n", "XSDT");
-        num = (sdt->length - sizeof(struct acpi_table_header))/sizeof(u64);
-        offset = (char *)sdt + sizeof(struct acpi_table_header);
-        for (i = 0; i < num; ++i, offset += sizeof(u64)) {
-                addr = (unsigned long)(*(u64 *)offset);
-                if (!addr) continue;
-                tbl = acpi_map_table(addr, 0);
-                if (!tbl) continue;
-                if (!memcmp(tbl->signature, FADT_SIG, 4)) {
-                        acpi_dump_FADT(fd, tbl, addr);
-                } else {
-                        if (checksum((u8 *)tbl, tbl->length))
-                                fprintf(stderr, "Wrong checksum for %.4s\n", tbl->signature);
-                        write_table(fd, tbl, addr);
+        tabledir = opendir(DYNAMIC_SSDT);
+        if(!tabledir){
+                /*can't open the directory */
+                return;
+         }
+
+        while ((entry = readdir(tabledir)) != 0){
+                /* skip the file of . /.. */
+                if (entry->d_name[0] == '.')
+                        continue;
+
+                sprintf(filename, "%s/%s", DYNAMIC_SSDT, entry->d_name);
+                fp = fopen(filename, "r");
+                if (fp == NULL) {
+                        fprintf(stderr, "Can't open the file of %s\n",
+                                                filename);
+                        continue;
                 }
-                acpi_unmap_table(tbl);
-                if (connect) {
-                        (*(u64*)offset) = lseek(fd, 0, SEEK_CUR);
+                /* Read the Table header to parse the table length */
+                count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp);
+                if (count < sizeof(table_header)) {
+                        /* the length is lessn than ACPI table header. skip it */
+                        fclose(fp);
+                        continue;
                 }
+                length = table_header.length;
+                ptr = malloc(table_header.length);
+                fseek(fp, 0, SEEK_SET);
+                readcount = 0;
+                while(!feof(fp) && readcount < length) {
+                        count = fread(ptr + readcount, 1, 256, fp);
+                        readcount += count;
+                }
+                fclose(fp);
+                ptable = (struct acpi_table_header *) ptr;
+                if (checksum((u8 *) ptable, ptable->length))
+                        fprintf(stderr, "Wrong checksum "
+                                        "for dynamic SSDT table!\n");
+                write_table(fd, ptable, 0);
+                free(ptr);
         }
-        addr = (unsigned long)rsdp->xsdt_physical_address;
-        if (connect) {
-                rsdp->xsdt_physical_address = lseek(fd, 0, SEEK_CUR);
-        }
-        write_table(fd, sdt, addr);
-        free (sdt);
-        return 1;
+        closedir(tabledir);
+        return;
 }
 
 static void usage(const char *progname)
@@ -518,6 +510,7 @@ int main(int argc, char **argv)
                         goto not_found;
                 write(fd, raw, length);
                 acpi_unmap_memory(raw, length);
+                close(fd);
                 return 0;
         }
 
@@ -540,12 +533,7 @@ int main(int argc, char **argv)
         if (connect) {
                 lseek(fd, sizeof(struct acpi_rsdp_descriptor), SEEK_SET);
         }
-        if (rsdpx.revision > 1 && rsdpx.xsdt_physical_address) {
-                /* ACPIDUMP uses xsdt table */
-                if (!acpi_dump_XSDT(fd, &rsdpx))
-                        goto not_found;
-        }
-        if (!acpi_dump_RSDT(fd, &rsdpx))
+        if (!acpi_dump_SDT(fd, &rsdpx))
                 goto not_found;
         if (connect) {
                 lseek(fd, 0, SEEK_SET);
@@ -560,8 +548,11 @@ int main(int argc, char **argv)
                 buff[0] = '\n';
                 write(fd, buff, 1);
         }
+        acpi_dump_dynamic_SSDT(fd);
+        close(fd);
         return 0;
 not_found:
+        close(fd);
         fprintf(stderr, "ACPI tables were not found. If you know location "
                 "of RSD PTR table (from dmesg, etc), "
                 "supply it with either --addr or -a option\n");