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authorMichael Tokarev <mjt@tls.msk.ru>2014-12-20 08:48:44 +0000
committerMichael Tokarev <mjt@tls.msk.ru>2014-12-20 08:48:44 +0000
commit489bea7ee8e1dbecfa517b8415568044ab57c73a (patch)
tree44d4878d4c7da3f4908ea9a765ef9b8f9c141756 /platform-intel.c
mdadm (3.3.2-5) unstable; urgency=medium
* use-tempnode-not-devnode.patch: change udev rules file to use $tempnode which works both on wheezy and jessie udev, instead of $devnode which only works in jessie. At this stage it is better to make rules file compatible with old version instead of adding versioned dependency. Should be removed for jessie+1. (Closes: #770883) * fix Closes: list in previous entry (Closes: #771852) # imported from the archive
Diffstat (limited to 'platform-intel.c')
-rw-r--r--platform-intel.c513
1 files changed, 513 insertions, 0 deletions
diff --git a/platform-intel.c b/platform-intel.c
new file mode 100644
index 0000000..f347382
--- /dev/null
+++ b/platform-intel.c
@@ -0,0 +1,513 @@
+/*
+ * 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>
+#include <limits.h>
+
+static int devpath_to_ll(const char *dev_path, const char *entry,
+ unsigned long long *val);
+
+static __u16 devpath_to_vendor(const char *dev_path);
+
+static 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;
+ enum sys_dev_type type;
+ unsigned long long dev_id;
+
+ if (strcmp(driver, "isci") == 0)
+ type = SYS_DEV_SAS;
+ else if (strcmp(driver, "ahci") == 0)
+ type = SYS_DEV_SATA;
+ else
+ type = SYS_DEV_UNKNOWN;
+
+ 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;
+
+ sprintf(path, "/sys/bus/%s/drivers/%s/%s",
+ bus, driver, de->d_name);
+
+ /* if it's not Intel device skip it. */
+ if (devpath_to_vendor(path) != 0x8086)
+ continue;
+
+ if (devpath_to_ll(path, "device", &dev_id) != 0)
+ continue;
+
+ /* start / add list entry */
+ if (!head) {
+ head = xmalloc(sizeof(*head));
+ list = head;
+ } else {
+ list->next = xmalloc(sizeof(*head));
+ list = list->next;
+ }
+
+ if (!list) {
+ free_sys_dev(&head);
+ break;
+ }
+
+ list->dev_id = (__u16) dev_id;
+ list->type = type;
+ list->path = realpath(path, NULL);
+ list->next = NULL;
+ if ((list->pci_id = strrchr(list->path, '/')) != NULL)
+ list->pci_id++;
+ }
+ closedir(driver_dir);
+ return head;
+}
+
+static struct sys_dev *intel_devices=NULL;
+static time_t valid_time = 0;
+
+static enum sys_dev_type device_type_by_id(__u16 device_id)
+{
+ struct sys_dev *iter;
+
+ for(iter = intel_devices; iter != NULL; iter = iter->next)
+ if (iter->dev_id == device_id)
+ return iter->type;
+ return SYS_DEV_UNKNOWN;
+}
+
+static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
+{
+ char path[strlen(dev_path) + strlen(entry) + 2];
+ int fd;
+ int n;
+
+ sprintf(path, "%s/%s", dev_path, entry);
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return -1;
+ n = sysfs_fd_get_ll(fd, val);
+ close(fd);
+ return n;
+}
+
+static __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;
+}
+
+struct sys_dev *find_intel_devices(void)
+{
+ struct sys_dev *ahci, *isci;
+
+ if (valid_time > time(0) - 10)
+ return intel_devices;
+
+ if (intel_devices)
+ free_sys_dev(&intel_devices);
+
+ isci = find_driver_devices("pci", "isci");
+ ahci = find_driver_devices("pci", "ahci");
+
+ if (!ahci) {
+ ahci = isci;
+ } else {
+ struct sys_dev *elem = ahci;
+ while (elem->next)
+ elem = elem->next;
+ elem->next = isci;
+ }
+ intel_devices = ahci;
+ valid_time = time(0);
+ return intel_devices;
+}
+
+/*
+ * PCI Expansion ROM Data Structure Format */
+struct pciExpDataStructFormat {
+ __u8 ver[4];
+ __u16 vendorID;
+ __u16 deviceID;
+} __attribute__ ((packed));
+
+static struct imsm_orom imsm_orom[SYS_DEV_MAX];
+static int populated_orom[SYS_DEV_MAX];
+
+static int scan(const void *start, const void *end, const void *data)
+{
+ int offset;
+ const struct imsm_orom *imsm_mem;
+ int dev;
+ int len = (end - start);
+ struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
+
+ if (data + 0x18 > end) {
+ dprintf("cannot find pciExpDataStruct \n");
+ return 0;
+ }
+
+ dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
+ (ulong) __le16_to_cpu(ptr->vendorID),
+ (ulong) __le16_to_cpu(ptr->deviceID));
+
+ if (__le16_to_cpu(ptr->vendorID) == 0x8086) {
+ /* serach attached intel devices by device id from OROM */
+ dev = device_type_by_id(__le16_to_cpu(ptr->deviceID));
+ if (dev == SYS_DEV_UNKNOWN)
+ return 0;
+ }
+ else
+ return 0;
+
+ for (offset = 0; offset < len; offset += 4) {
+ imsm_mem = start + offset;
+ if ((memcmp(imsm_mem->signature, "$VER", 4) == 0)) {
+ imsm_orom[dev] = *imsm_mem;
+ populated_orom[dev] = 1;
+ return populated_orom[SYS_DEV_SATA] && populated_orom[SYS_DEV_SAS];
+ }
+ }
+ return 0;
+}
+
+const struct imsm_orom *imsm_platform_test(enum sys_dev_type hba_id, int *populated,
+ struct imsm_orom *imsm_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 = IMSM_OROM_DISKS_PER_ARRAY;
+ imsm_orom->tds = IMSM_OROM_TOTAL_DISKS;
+ imsm_orom->vpa = IMSM_OROM_VOLUMES_PER_ARRAY;
+ imsm_orom->vphba = IMSM_OROM_VOLUMES_PER_HBA;
+ imsm_orom->attr = imsm_orom->rlc | IMSM_OROM_ATTR_ChecksumVerify;
+ *populated = 1;
+
+ if (check_env("IMSM_TEST_OROM_NORAID5")) {
+ imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+ if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba_id == SYS_DEV_SAS)) {
+ imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+ if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba_id == SYS_DEV_SATA)) {
+ imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
+ IMSM_OROM_RLC_RAID10;
+ }
+
+ return imsm_orom;
+}
+
+static const struct imsm_orom *find_imsm_hba_orom(enum sys_dev_type hba_id)
+{
+ unsigned long align;
+
+ if (hba_id >= SYS_DEV_MAX)
+ return NULL;
+
+ /* it's static data so we only need to read it once */
+ if (populated_orom[hba_id]) {
+ dprintf("OROM CAP: %p, pid: %d pop: %d\n",
+ &imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
+ return &imsm_orom[hba_id];
+ }
+ if (check_env("IMSM_TEST_OROM")) {
+ dprintf("OROM CAP: %p, pid: %d pop: %d\n",
+ &imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
+ return imsm_platform_test(hba_id, &populated_orom[hba_id], &imsm_orom[hba_id]);
+ }
+ /* return empty OROM capabilities in EFI test mode */
+ if (check_env("IMSM_TEST_AHCI_EFI") ||
+ check_env("IMSM_TEST_SCU_EFI"))
+ return NULL;
+
+ find_intel_devices();
+
+ if (intel_devices == NULL)
+ 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();
+ /* ignore return value - True is returned if both adapater roms are found */
+ scan_adapter_roms(scan);
+ probe_roms_exit();
+
+ if (populated_orom[hba_id])
+ return &imsm_orom[hba_id];
+ return NULL;
+}
+
+#define GUID_STR_MAX 37 /* according to GUID format:
+ * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
+
+#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
+((struct efi_guid) \
+{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
+ (b) & 0xff, ((b) >> 8) & 0xff, \
+ (c) & 0xff, ((c) >> 8) & 0xff, \
+ (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
+
+#define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
+#define SCU_PROP "RstScuV"
+#define AHCI_PROP "RstSataV"
+
+#define VENDOR_GUID \
+ EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
+
+int populated_efi[SYS_DEV_MAX] = { 0, 0 };
+
+static struct imsm_orom imsm_efi[SYS_DEV_MAX];
+
+int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
+{
+ char path[PATH_MAX];
+ char buf[GUID_STR_MAX];
+ int dfd;
+ ssize_t n, var_data_len;
+
+ snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
+
+ dprintf("EFI VAR: path=%s\n", path);
+ /* get size of variable data */
+ dfd = open(path, O_RDONLY);
+ if (dfd < 0)
+ return 1;
+
+ n = read(dfd, &buf, sizeof(buf));
+ close(dfd);
+ if (n < 0)
+ return 1;
+ buf[n] = '\0';
+
+ errno = 0;
+ var_data_len = strtoul(buf, NULL, 16);
+ if ((errno == ERANGE && (var_data_len == LONG_MAX))
+ || (errno != 0 && var_data_len == 0))
+ return 1;
+
+ /* get data */
+ snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
+
+ dprintf("EFI VAR: path=%s\n", path);
+ dfd = open(path, O_RDONLY);
+ if (dfd < 0)
+ return 1;
+
+ n = read(dfd, buffer, buf_size);
+ close(dfd);
+ if (n != var_data_len || n < buf_size) {
+ return 1;
+ }
+
+ return 0;
+}
+
+const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id)
+{
+ if (hba_id >= SYS_DEV_MAX)
+ return NULL;
+
+ dprintf("EFI CAP: %p, pid: %d pop: %d\n",
+ &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);
+
+ /* it's static data so we only need to read it once */
+ if (populated_efi[hba_id]) {
+ dprintf("EFI CAP: %p, pid: %d pop: %d\n",
+ &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);
+ return &imsm_efi[hba_id];
+ }
+ if (check_env("IMSM_TEST_AHCI_EFI") ||
+ check_env("IMSM_TEST_SCU_EFI")) {
+ dprintf("OROM CAP: %p, pid: %d pop: %d\n",
+ &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);
+ return imsm_platform_test(hba_id, &populated_efi[hba_id], &imsm_efi[hba_id]);
+ }
+ /* OROM test is set, return that there is no EFI capabilities */
+ if (check_env("IMSM_TEST_OROM"))
+ return NULL;
+
+ if (read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID)) {
+ populated_efi[hba_id] = 0;
+ return NULL;
+ }
+
+ populated_efi[hba_id] = 1;
+ return &imsm_efi[hba_id];
+}
+
+/*
+ * backward interface compatibility
+ */
+const struct imsm_orom *find_imsm_orom(void)
+{
+ return find_imsm_hba_orom(SYS_DEV_SATA);
+}
+
+const struct imsm_orom *find_imsm_capability(enum sys_dev_type hba_id)
+{
+ const struct imsm_orom *cap=NULL;
+
+ if ((cap = find_imsm_efi(hba_id)) != NULL)
+ return cap;
+ if ((cap = find_imsm_hba_orom(hba_id)) != NULL)
+ return cap;
+ 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 realpath(device, NULL);
+}
+
+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 (check_env("IMSM_TEST_AHCI_DEV") ||
+ check_env("IMSM_TEST_SCU_DEV")) {
+ return 1;
+ }
+
+ if (!disk_path || !hba_path)
+ return 0;
+ dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
+ 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;
+}