f21e18ca89
This produced lots of warning, some of which pointed to actual bugs. Signed-off-by: NeilBrown <neilb@suse.de>
267 lines
5.8 KiB
C
267 lines
5.8 KiB
C
/*
|
|
* Intel(R) Matrix Storage Manager hardware and firmware support routines
|
|
*
|
|
* Copyright (C) 2008 Intel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
#include "mdadm.h"
|
|
#include "platform-intel.h"
|
|
#include "probe_roms.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <dirent.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
void free_sys_dev(struct sys_dev **list)
|
|
{
|
|
while (*list) {
|
|
struct sys_dev *next = (*list)->next;
|
|
|
|
if ((*list)->path)
|
|
free((*list)->path);
|
|
free(*list);
|
|
*list = next;
|
|
}
|
|
}
|
|
|
|
struct sys_dev *find_driver_devices(const char *bus, const char *driver)
|
|
{
|
|
/* search sysfs for devices driven by 'driver' */
|
|
char path[292];
|
|
char link[256];
|
|
char *c;
|
|
DIR *driver_dir;
|
|
struct dirent *de;
|
|
struct sys_dev *head = NULL;
|
|
struct sys_dev *list = NULL;
|
|
|
|
sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
|
|
driver_dir = opendir(path);
|
|
if (!driver_dir)
|
|
return NULL;
|
|
for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
|
|
int n;
|
|
|
|
/* is 'de' a device? check that the 'subsystem' link exists and
|
|
* that its target matches 'bus'
|
|
*/
|
|
sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem",
|
|
bus, driver, de->d_name);
|
|
n = readlink(path, link, sizeof(link));
|
|
if (n < 0 || n >= (int)sizeof(link))
|
|
continue;
|
|
link[n] = '\0';
|
|
c = strrchr(link, '/');
|
|
if (!c)
|
|
continue;
|
|
if (strncmp(bus, c+1, strlen(bus)) != 0)
|
|
continue;
|
|
|
|
/* start / add list entry */
|
|
if (!head) {
|
|
head = malloc(sizeof(*head));
|
|
list = head;
|
|
} else {
|
|
list->next = malloc(sizeof(*head));
|
|
list = list->next;
|
|
}
|
|
|
|
if (!list) {
|
|
free_sys_dev(&head);
|
|
break;
|
|
}
|
|
|
|
/* generate canonical path name for the device */
|
|
sprintf(path, "/sys/bus/%s/drivers/%s/%s",
|
|
bus, driver, de->d_name);
|
|
list->path = canonicalize_file_name(path);
|
|
list->next = NULL;
|
|
}
|
|
closedir(driver_dir);
|
|
return head;
|
|
}
|
|
|
|
__u16 devpath_to_vendor(const char *dev_path)
|
|
{
|
|
char path[strlen(dev_path) + strlen("/vendor") + 1];
|
|
char vendor[7];
|
|
int fd;
|
|
__u16 id = 0xffff;
|
|
int n;
|
|
|
|
sprintf(path, "%s/vendor", dev_path);
|
|
|
|
fd = open(path, O_RDONLY);
|
|
if (fd < 0)
|
|
return 0xffff;
|
|
|
|
n = read(fd, vendor, sizeof(vendor));
|
|
if (n == sizeof(vendor)) {
|
|
vendor[n - 1] = '\0';
|
|
id = strtoul(vendor, NULL, 16);
|
|
}
|
|
close(fd);
|
|
|
|
return id;
|
|
}
|
|
|
|
static int platform_has_intel_ahci(void)
|
|
{
|
|
struct sys_dev *devices = find_driver_devices("pci", "ahci");
|
|
struct sys_dev *dev;
|
|
int ret = 0;
|
|
|
|
for (dev = devices; dev; dev = dev->next)
|
|
if (devpath_to_vendor(dev->path) == 0x8086) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
free_sys_dev(&devices);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static struct imsm_orom imsm_orom;
|
|
static int scan(const void *start, const void *end)
|
|
{
|
|
int offset;
|
|
const struct imsm_orom *imsm_mem;
|
|
int len = (end - start);
|
|
|
|
for (offset = 0; offset < len; offset += 4) {
|
|
imsm_mem = start + offset;
|
|
if (memcmp(imsm_mem->signature, "$VER", 4) == 0) {
|
|
imsm_orom = *imsm_mem;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct imsm_orom *find_imsm_orom(void)
|
|
{
|
|
static int populated = 0;
|
|
unsigned long align;
|
|
|
|
/* it's static data so we only need to read it once */
|
|
if (populated)
|
|
return &imsm_orom;
|
|
|
|
if (check_env("IMSM_TEST_OROM")) {
|
|
memset(&imsm_orom, 0, sizeof(imsm_orom));
|
|
imsm_orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
|
|
IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5;
|
|
imsm_orom.sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
|
|
IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
|
|
IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB |
|
|
IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
|
|
IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB;
|
|
imsm_orom.dpa = 6;
|
|
imsm_orom.tds = 6;
|
|
imsm_orom.vpa = 2;
|
|
imsm_orom.vphba = 4;
|
|
imsm_orom.attr = imsm_orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
|
|
populated = 1;
|
|
return &imsm_orom;
|
|
}
|
|
|
|
if (!platform_has_intel_ahci())
|
|
return NULL;
|
|
|
|
/* scan option-rom memory looking for an imsm signature */
|
|
if (check_env("IMSM_SAFE_OROM_SCAN"))
|
|
align = 2048;
|
|
else
|
|
align = 512;
|
|
if (probe_roms_init(align) != 0)
|
|
return NULL;
|
|
probe_roms();
|
|
populated = scan_adapter_roms(scan);
|
|
probe_roms_exit();
|
|
|
|
if (populated)
|
|
return &imsm_orom;
|
|
return NULL;
|
|
}
|
|
|
|
char *devt_to_devpath(dev_t dev)
|
|
{
|
|
char device[46];
|
|
|
|
sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
|
|
return canonicalize_file_name(device);
|
|
}
|
|
|
|
static char *diskfd_to_devpath(int fd)
|
|
{
|
|
/* return the device path for a disk, return NULL on error or fd
|
|
* refers to a partition
|
|
*/
|
|
struct stat st;
|
|
|
|
if (fstat(fd, &st) != 0)
|
|
return NULL;
|
|
if (!S_ISBLK(st.st_mode))
|
|
return NULL;
|
|
|
|
return devt_to_devpath(st.st_rdev);
|
|
}
|
|
|
|
int path_attached_to_hba(const char *disk_path, const char *hba_path)
|
|
{
|
|
int rc;
|
|
|
|
if (!disk_path || !hba_path)
|
|
return 0;
|
|
|
|
if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
|
|
rc = 1;
|
|
else
|
|
rc = 0;
|
|
|
|
return rc;
|
|
}
|
|
|
|
int devt_attached_to_hba(dev_t dev, const char *hba_path)
|
|
{
|
|
char *disk_path = devt_to_devpath(dev);
|
|
int rc = path_attached_to_hba(disk_path, hba_path);
|
|
|
|
if (disk_path)
|
|
free(disk_path);
|
|
|
|
return rc;
|
|
}
|
|
|
|
int disk_attached_to_hba(int fd, const char *hba_path)
|
|
{
|
|
char *disk_path = diskfd_to_devpath(fd);
|
|
int rc = path_attached_to_hba(disk_path, hba_path);
|
|
|
|
if (disk_path)
|
|
free(disk_path);
|
|
|
|
return rc;
|
|
}
|
|
|