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