Adds data offset to PCI expansion ROM Data Structure in resource describing Expansion ROMs. This allows AHCI OROM scanning function to identify AHCI OROM by device id 0x2822 and vendor id 0x8086. Signed-off-by: Marcin Labun <marcin.labun@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
309 lines
6.8 KiB
C
309 lines
6.8 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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enum sys_dev_type type;
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if (strcmp(driver, "isci") == 0)
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type = SYS_DEV_SAS;
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else if (strcmp(driver, "ahci") == 0)
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type = SYS_DEV_SATA;
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else
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type = SYS_DEV_UNKNOWN;
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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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sprintf(path, "/sys/bus/%s/drivers/%s/%s",
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bus, driver, de->d_name);
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/* if it's not Intel device skip it. */
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if (devpath_to_vendor(path) != 0x8086)
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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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list->type = type;
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list->path = canonicalize_file_name(path);
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list->next = NULL;
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if ((list->pci_id = strrchr(list->path, '/')) != NULL)
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list->pci_id++;
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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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struct sys_dev *find_intel_devices(void)
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{
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struct sys_dev *ahci, *isci;
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isci = find_driver_devices("pci", "isci");
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ahci = find_driver_devices("pci", "ahci");
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if (!ahci) {
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ahci = isci;
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} else {
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struct sys_dev *elem = ahci;
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while (elem->next)
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elem = elem->next;
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elem->next = isci;
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}
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return ahci;
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}
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static int platform_has_intel_devices(void)
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{
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struct sys_dev *devices;
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devices = find_intel_devices();
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if (devices) {
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free_sys_dev(&devices);
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return 1;
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}
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return 0;
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}
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/*
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* PCI Expansion ROM Data Structure Format
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*/
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struct pciExpDataStructFormat {
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__u8 ver[4];
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__u16 vendorID;
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__u16 deviceID;
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} __attribute__ ((packed));
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static struct imsm_orom imsm_orom;
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static int scan(const void *start, const void *end, const void *data)
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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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struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
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dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
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(ulong) __le16_to_cpu(ptr->vendorID),
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(ulong) __le16_to_cpu(ptr->deviceID));
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if (!((__le16_to_cpu(ptr->vendorID) == 0x8086) &&
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(__le16_to_cpu(ptr->deviceID) == 0x2822)))
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return 0;
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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_devices())
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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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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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dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
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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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