It will be used for reading efi variables with capabilities. Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
388 lines
9.2 KiB
C
388 lines
9.2 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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#include <limits.h>
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static __u16 devpath_to_vendor(const char *dev_path);
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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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static __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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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[SYS_DEV_MAX];
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static int populated_orom[SYS_DEV_MAX];
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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 dev;
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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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dev = SYS_DEV_SATA;
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else if ((__le16_to_cpu(ptr->vendorID) == 0x8086) &&
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(__le16_to_cpu(ptr->deviceID) == 0x1D60))
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dev = SYS_DEV_SAS;
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else
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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[dev] = *imsm_mem;
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populated_orom[dev] = 1;
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return populated_orom[SYS_DEV_SATA] && populated_orom[SYS_DEV_SAS];
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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 *imsm_platform_test(enum sys_dev_type hba_id, int *populated,
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struct imsm_orom *imsm_orom)
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{
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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 = IMSM_OROM_DISKS_PER_ARRAY;
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imsm_orom->tds = IMSM_OROM_TOTAL_DISKS;
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imsm_orom->vpa = IMSM_OROM_VOLUMES_PER_ARRAY;
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imsm_orom->vphba = IMSM_OROM_VOLUMES_PER_HBA;
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imsm_orom->attr = imsm_orom->rlc | IMSM_OROM_ATTR_ChecksumVerify;
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*populated = 1;
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if (check_env("IMSM_TEST_OROM_NORAID5")) {
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imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
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if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba_id == SYS_DEV_SAS)) {
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imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
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if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba_id == SYS_DEV_SATA)) {
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imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
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IMSM_OROM_RLC_RAID10;
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}
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return imsm_orom;
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}
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static const struct imsm_orom *find_imsm_hba_orom(enum sys_dev_type hba_id)
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{
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unsigned long align;
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if (hba_id >= SYS_DEV_MAX)
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return NULL;
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/* it's static data so we only need to read it once */
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if (populated_orom[hba_id]) {
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dprintf("OROM CAP: %p, pid: %d pop: %d\n",
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&imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
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return &imsm_orom[hba_id];
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}
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if (check_env("IMSM_TEST_OROM")) {
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dprintf("OROM CAP: %p, pid: %d pop: %d\n",
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&imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
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return imsm_platform_test(hba_id, &populated_orom[hba_id], &imsm_orom[hba_id]);
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}
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/* return empty OROM capabilities in EFI test mode */
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if (check_env("IMSM_TEST_AHCI_EFI") ||
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check_env("IMSM_TEST_SCU_EFI"))
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return NULL;
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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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/* ignore result - True is returned if both are found */
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scan_adapter_roms(scan);
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probe_roms_exit();
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if (populated_orom[hba_id])
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return &imsm_orom[hba_id];
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return NULL;
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}
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#define GUID_STR_MAX 37 /* according to GUID format:
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* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
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#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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((struct efi_guid) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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/*
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* backward interface compatibility
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*/
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const struct imsm_orom *find_imsm_orom(void)
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{
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return find_imsm_hba_orom(SYS_DEV_SATA);
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}
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const struct imsm_orom *find_imsm_capability(enum sys_dev_type hba_id)
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{
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const struct imsm_orom *cap=NULL;
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if ((cap = find_imsm_hba_orom(hba_id)) != NULL)
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return cap;
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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 (check_env("IMSM_TEST_AHCI_DEV") ||
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check_env("IMSM_TEST_SCU_DEV")) {
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return 1;
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}
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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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