platform-intel.c

   1 /*
   2  * Intel(R) Matrix Storage Manager hardware and firmware support routines
   3  *
   4  * Copyright (C) 2008 Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 #include "mdadm.h"
  20 #include "platform-intel.h"
  21 #include "probe_roms.h"
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <dirent.h>
  27 #include <fcntl.h>
  28 #include <sys/mman.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <limits.h>
  32
  33 static int devpath_to_ll(const char *dev_path, const char *entry,
  34                          unsigned long long *val);
  35
  36 static void free_sys_dev(struct sys_dev **list)
  37 {
  38         while (*list) {
  39                 struct sys_dev *next = (*list)->next;
  40
  41                 if ((*list)->path)
  42                         free((*list)->path);
  43                 free(*list);
  44                 *list = next;
  45         }
  46 }
  47
  48 struct sys_dev *find_driver_devices(const char *bus, const char *driver)
  49 {
  50         /* search sysfs for devices driven by 'driver' */
  51         char path[292];
  52         char link[256];
  53         char *c;
  54         DIR *driver_dir;
  55         struct dirent *de;
  56         struct sys_dev *head = NULL;
  57         struct sys_dev *list = NULL;
  58         struct sys_dev *vmd = NULL;
  59         enum sys_dev_type type;
  60         unsigned long long dev_id;
  61         unsigned long long class;
  62
  63         if (strcmp(driver, "isci") == 0)
  64                 type = SYS_DEV_SAS;
  65         else if (strcmp(driver, "ahci") == 0)
  66                 type = SYS_DEV_SATA;
  67         else if (strcmp(driver, "nvme") == 0) {
  68                 /* if looking for nvme devs, first look for vmd */
  69                 vmd = find_driver_devices("pci", "vmd");
  70                 type = SYS_DEV_NVME;
  71         } else if (strcmp(driver, "vmd") == 0)
  72                 type = SYS_DEV_VMD;
  73         else
  74                 type = SYS_DEV_UNKNOWN;
  75
  76         sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
  77         driver_dir = opendir(path);
  78         if (!driver_dir) {
  79                 if (vmd)
  80                         free_sys_dev(&vmd);
  81                 return NULL;
  82         }
  83         for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
  84                 int n;
  85                 int skip = 0;
  86
  87                 /* is 'de' a device? check that the 'subsystem' link exists and
  88                  * that its target matches 'bus'
  89                  */
  90                 sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem",
  91                         bus, driver, de->d_name);
  92                 n = readlink(path, link, sizeof(link));
  93                 if (n < 0 || n >= (int)sizeof(link))
  94                         continue;
  95                 link[n] = '\0';
  96                 c = strrchr(link, '/');
  97                 if (!c)
  98                         continue;
  99                 if (strncmp(bus, c+1, strlen(bus)) != 0)
 100                         continue;
 101
 102                 sprintf(path, "/sys/bus/%s/drivers/%s/%s",
 103                         bus, driver, de->d_name);
 104
 105                 /* if searching for nvme - skip vmd connected one */
 106                 if (type == SYS_DEV_NVME) {
 107                         struct sys_dev *dev;
 108                         char *rp = realpath(path, NULL);
 109                         for (dev = vmd; dev; dev = dev->next) {
 110                                 if ((strncmp(dev->path, rp, strlen(dev->path)) == 0))
 111                                         skip = 1;
 112                         }
 113                         free(rp);
 114                 }
 115
 116                 /* if it's not Intel device or mark as VMD connected - skip it. */
 117                 if (devpath_to_vendor(path) != 0x8086 || skip == 1)
 118                         continue;
 119
 120                 if (devpath_to_ll(path, "device", &dev_id) != 0)
 121                         continue;
 122
 123                 if (devpath_to_ll(path, "class", &class) != 0)
 124                         continue;
 125
 126                 /* start / add list entry */
 127                 if (!head) {
 128                         head = xmalloc(sizeof(*head));
 129                         list = head;
 130                 } else {
 131                         list->next = xmalloc(sizeof(*head));
 132                         list = list->next;
 133                 }
 134
 135                 if (!list) {
 136                         free_sys_dev(&head);
 137                         break;
 138                 }
 139
 140                 list->dev_id = (__u16) dev_id;
 141                 list->class = (__u32) class;
 142                 list->type = type;
 143                 /* Each VMD device (domain) adds separate PCI bus, it is better to
 144                  * store path as a path to that bus (easier further determination which
 145                  * NVMe dev is connected to this particular VMD domain).
 146                  */
 147                 if (type == SYS_DEV_VMD) {
 148                         sprintf(path, "/sys/bus/%s/drivers/%s/%s/domain/device",
 149                         bus, driver, de->d_name);
 150                 }
 151                 list->path = realpath(path, NULL);
 152                 list->next = NULL;
 153                 if ((list->pci_id = strrchr(list->path, '/')) != NULL)
 154                         list->pci_id++;
 155         }
 156         closedir(driver_dir);
 157
 158         if (vmd) {
 159                 if (list)
 160                         list->next = vmd;
 161                 else
 162                         head = vmd;
 163         }
 164
 165         return head;
 166 }
 167
 168 static struct sys_dev *intel_devices=NULL;
 169 static time_t valid_time = 0;
 170
 171 struct sys_dev *device_by_id(__u16 device_id)
 172 {
 173         struct sys_dev *iter;
 174
 175         for (iter = intel_devices; iter != NULL; iter = iter->next)
 176                 if (iter->dev_id == device_id)
 177                         return iter;
 178         return NULL;
 179 }
 180
 181 static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
 182 {
 183         char path[strlen(dev_path) + strlen(entry) + 2];
 184         int fd;
 185         int n;
 186
 187         sprintf(path, "%s/%s", dev_path, entry);
 188
 189         fd = open(path, O_RDONLY);
 190         if (fd < 0)
 191                 return -1;
 192         n = sysfs_fd_get_ll(fd, val);
 193         close(fd);
 194         return n;
 195 }
 196
 197 __u16 devpath_to_vendor(const char *dev_path)
 198 {
 199         char path[strlen(dev_path) + strlen("/vendor") + 1];
 200         char vendor[7];
 201         int fd;
 202         __u16 id = 0xffff;
 203         int n;
 204
 205         sprintf(path, "%s/vendor", dev_path);
 206
 207         fd = open(path, O_RDONLY);
 208         if (fd < 0)
 209                 return 0xffff;
 210
 211         n = read(fd, vendor, sizeof(vendor));
 212         if (n == sizeof(vendor)) {
 213                 vendor[n - 1] = '\0';
 214                 id = strtoul(vendor, NULL, 16);
 215         }
 216         close(fd);
 217
 218         return id;
 219 }
 220
 221 struct sys_dev *find_intel_devices(void)
 222 {
 223         struct sys_dev *ahci, *isci, *nvme;
 224
 225         if (valid_time > time(0) - 10)
 226                 return intel_devices;
 227
 228         if (intel_devices)
 229                 free_sys_dev(&intel_devices);
 230
 231         isci = find_driver_devices("pci", "isci");
 232         ahci = find_driver_devices("pci", "ahci");
 233         /* Searching for NVMe will return list of NVMe and VMD controllers */
 234         nvme = find_driver_devices("pci", "nvme");
 235
 236         if (!isci && !ahci) {
 237                 ahci = nvme;
 238         } else if (!ahci) {
 239                 ahci = isci;
 240                 struct sys_dev *elem = ahci;
 241                 while (elem->next)
 242                         elem = elem->next;
 243                 elem->next = nvme;
 244         } else {
 245                 struct sys_dev *elem = ahci;
 246                 while (elem->next)
 247                         elem = elem->next;
 248                 elem->next = isci;
 249                 while (elem->next)
 250                         elem = elem->next;
 251                 elem->next = nvme;
 252         }
 253         intel_devices = ahci;
 254         valid_time = time(0);
 255         return intel_devices;
 256 }
 257
 258 /*
 259  * PCI Expansion ROM Data Structure Format */
 260 struct pciExpDataStructFormat {
 261         __u8  ver[4];
 262         __u16 vendorID;
 263         __u16 deviceID;
 264         __u16 devListOffset;
 265         __u16 pciDataStructLen;
 266         __u8 pciDataStructRev;
 267 } __attribute__ ((packed));
 268
 269 struct orom_entry *orom_entries;
 270
 271 const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id)
 272 {
 273         struct orom_entry *entry;
 274         struct devid_list *devid;
 275
 276         for (entry = orom_entries; entry; entry = entry->next) {
 277                 for (devid = entry->devid_list; devid; devid = devid->next) {
 278                         if (devid->devid == dev_id)
 279                                 return entry;
 280                 }
 281         }
 282
 283         return NULL;
 284 }
 285
 286 const struct imsm_orom *get_orom_by_device_id(__u16 dev_id)
 287 {
 288         const struct orom_entry *entry = get_orom_entry_by_device_id(dev_id);
 289
 290         if (entry)
 291                 return &entry->orom;
 292
 293         return NULL;
 294 }
 295
 296 static struct orom_entry *add_orom(const struct imsm_orom *orom)
 297 {
 298         struct orom_entry *list;
 299         struct orom_entry *prev = NULL;
 300
 301         for (list = orom_entries; list; prev = list, list = list->next)
 302                 ;
 303
 304         list = xmalloc(sizeof(struct orom_entry));
 305         list->orom = *orom;
 306         list->devid_list = NULL;
 307         list->next = NULL;
 308
 309         if (prev == NULL)
 310                 orom_entries = list;
 311         else
 312                 prev->next = list;
 313
 314         return list;
 315 }
 316
 317 static void add_orom_device_id(struct orom_entry *entry, __u16 dev_id)
 318 {
 319         struct devid_list *list;
 320         struct devid_list *prev = NULL;
 321
 322         for (list = entry->devid_list; list; prev = list, list = list->next) {
 323                 if (list->devid == dev_id)
 324                         return;
 325         }
 326         list = xmalloc(sizeof(struct devid_list));
 327         list->devid = dev_id;
 328         list->next = NULL;
 329
 330         if (prev == NULL)
 331                 entry->devid_list = list;
 332         else
 333                 prev->next = list;
 334 }
 335
 336 static int scan(const void *start, const void *end, const void *data)
 337 {
 338         int offset;
 339         const struct imsm_orom *imsm_mem = NULL;
 340         int len = (end - start);
 341         struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;
 342
 343         if (data + 0x18 > end) {
 344                 dprintf("cannot find pciExpDataStruct \n");
 345                 return 0;
 346         }
 347
 348         dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
 349                 (ulong) __le16_to_cpu(ptr->vendorID),
 350                 (ulong) __le16_to_cpu(ptr->deviceID));
 351
 352         if (__le16_to_cpu(ptr->vendorID) != 0x8086)
 353                 return 0;
 354
 355         for (offset = 0; offset < len; offset += 4) {
 356                 const void *mem = start + offset;
 357
 358                 if ((memcmp(mem, IMSM_OROM_SIGNATURE, 4) == 0)) {
 359                         imsm_mem = mem;
 360                         break;
 361                 }
 362         }
 363
 364         if (!imsm_mem)
 365                 return 0;
 366
 367         struct orom_entry *orom = add_orom(imsm_mem);
 368
 369         /* only PciDataStructure with revision 3 and above supports devices list. */
 370         if (ptr->pciDataStructRev >= 3 && ptr->devListOffset) {
 371                 const __u16 *dev_list = (void *)ptr + ptr->devListOffset;
 372                 int i;
 373
 374                 for (i = 0; dev_list[i] != 0; i++)
 375                         add_orom_device_id(orom, dev_list[i]);
 376         } else {
 377                 add_orom_device_id(orom, __le16_to_cpu(ptr->deviceID));
 378         }
 379
 380         return 0;
 381 }
 382
 383 const struct imsm_orom *imsm_platform_test(struct sys_dev *hba)
 384 {
 385         struct imsm_orom orom = {
 386                 .signature = IMSM_OROM_SIGNATURE,
 387                 .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
 388                                         IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
 389                 .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
 390                                         IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
 391                                         IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB |
 392                                         IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
 393                                         IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB,
 394                 .dpa = IMSM_OROM_DISKS_PER_ARRAY,
 395                 .tds = IMSM_OROM_TOTAL_DISKS,
 396                 .vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
 397                 .vphba = IMSM_OROM_VOLUMES_PER_HBA
 398         };
 399         orom.attr = orom.rlc | IMSM_OROM_ATTR_ChecksumVerify;
 400
 401         if (check_env("IMSM_TEST_OROM_NORAID5")) {
 402                 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
 403                                 IMSM_OROM_RLC_RAID10;
 404         }
 405         if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba->type == SYS_DEV_SAS)) {
 406                 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
 407                                 IMSM_OROM_RLC_RAID10;
 408         }
 409         if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba->type == SYS_DEV_SATA)) {
 410                 orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
 411                                 IMSM_OROM_RLC_RAID10;
 412         }
 413
 414         struct orom_entry *ret = add_orom(&orom);
 415
 416         add_orom_device_id(ret, hba->dev_id);
 417
 418         return &ret->orom;
 419 }
 420
 421 static const struct imsm_orom *find_imsm_hba_orom(struct sys_dev *hba)
 422 {
 423         unsigned long align;
 424
 425         if (check_env("IMSM_TEST_OROM"))
 426                 return imsm_platform_test(hba);
 427
 428         /* return empty OROM capabilities in EFI test mode */
 429         if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
 430                 return NULL;
 431
 432         find_intel_devices();
 433
 434         if (intel_devices == NULL)
 435                 return NULL;
 436
 437         /* scan option-rom memory looking for an imsm signature */
 438         if (check_env("IMSM_SAFE_OROM_SCAN"))
 439                 align = 2048;
 440         else
 441                 align = 512;
 442         if (probe_roms_init(align) != 0)
 443                 return NULL;
 444         probe_roms();
 445         /* ignore return value - True is returned if both adapater roms are found */
 446         scan_adapter_roms(scan);
 447         probe_roms_exit();
 448
 449         return get_orom_by_device_id(hba->dev_id);
 450 }
 451
 452 #define GUID_STR_MAX    37  /* according to GUID format:
 453                              * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
 454
 455 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
 456 ((struct efi_guid) \
 457 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
 458   (b) & 0xff, ((b) >> 8) & 0xff, \
 459   (c) & 0xff, ((c) >> 8) & 0xff, \
 460   (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
 461
 462 #define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
 463 #define SYS_EFIVARS_PATH "/sys/firmware/efi/efivars"
 464 #define SCU_PROP "RstScuV"
 465 #define AHCI_PROP "RstSataV"
 466 #define AHCI_SSATA_PROP "RstsSatV"
 467 #define AHCI_CSATA_PROP "RstCSatV"
 468 #define VMD_PROP "RstUefiV"
 469
 470 #define VENDOR_GUID \
 471         EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
 472
 473 #define PCI_CLASS_RAID_CNTRL 0x010400
 474
 475 static int read_efi_var(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
 476 {
 477         char path[PATH_MAX];
 478         char buf[GUID_STR_MAX];
 479         int fd;
 480         ssize_t n;
 481
 482         snprintf(path, PATH_MAX, "%s/%s-%s", SYS_EFIVARS_PATH, variable_name, guid_str(buf, guid));
 483
 484         fd = open(path, O_RDONLY);
 485         if (fd < 0)
 486                 return 1;
 487
 488         /* read the variable attributes and ignore it */
 489         n = read(fd, buf, sizeof(__u32));
 490         if (n < 0) {
 491                 close(fd);
 492                 return 1;
 493         }
 494
 495         /* read the variable data */
 496         n = read(fd, buffer, buf_size);
 497         close(fd);
 498         if (n < buf_size)
 499                 return 1;
 500
 501         return 0;
 502 }
 503
 504 static int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
 505 {
 506         char path[PATH_MAX];
 507         char buf[GUID_STR_MAX];
 508         int dfd;
 509         ssize_t n, var_data_len;
 510
 511         /* Try to read the variable using the new efivarfs interface first.
 512          * If that fails, fall back to the old sysfs-efivars interface. */
 513         if (!read_efi_var(buffer, buf_size, variable_name, guid))
 514                 return 0;
 515
 516         snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
 517
 518         dprintf("EFI VAR: path=%s\n", path);
 519         /* get size of variable data */
 520         dfd = open(path, O_RDONLY);
 521         if (dfd < 0)
 522                 return 1;
 523
 524         n = read(dfd, &buf, sizeof(buf));
 525         close(dfd);
 526         if (n < 0)
 527                 return 1;
 528         buf[n] = '\0';
 529
 530         errno = 0;
 531         var_data_len = strtoul(buf, NULL, 16);
 532         if ((errno == ERANGE && (var_data_len == LONG_MAX))
 533             || (errno != 0 && var_data_len == 0))
 534                 return 1;
 535
 536         /* get data */
 537         snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));
 538
 539         dprintf("EFI VAR: path=%s\n", path);
 540         dfd = open(path, O_RDONLY);
 541         if (dfd < 0)
 542                 return 1;
 543
 544         n = read(dfd, buffer, buf_size);
 545         close(dfd);
 546         if (n != var_data_len || n < buf_size) {
 547                 return 1;
 548         }
 549
 550         return 0;
 551 }
 552
 553 const struct imsm_orom *find_imsm_efi(struct sys_dev *hba)
 554 {
 555         struct imsm_orom orom;
 556         struct orom_entry *ret;
 557         int err;
 558
 559         if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI"))
 560                 return imsm_platform_test(hba);
 561
 562         /* OROM test is set, return that there is no EFI capabilities */
 563         if (check_env("IMSM_TEST_OROM"))
 564                 return NULL;
 565
 566         if (hba->type == SYS_DEV_SATA && hba->class != PCI_CLASS_RAID_CNTRL)
 567                 return NULL;
 568
 569         err = read_efi_variable(&orom, sizeof(orom), hba->type == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID);
 570
 571         /* try to read variable for second AHCI controller */
 572         if (err && hba->type == SYS_DEV_SATA)
 573                 err = read_efi_variable(&orom, sizeof(orom), AHCI_SSATA_PROP, VENDOR_GUID);
 574
 575         /* try to read variable for combined AHCI controllers */
 576         if (err && hba->type == SYS_DEV_SATA) {
 577                 static struct orom_entry *csata;
 578
 579                 err = read_efi_variable(&orom, sizeof(orom), AHCI_CSATA_PROP, VENDOR_GUID);
 580                 if (!err) {
 581                         if (!csata)
 582                                 csata = add_orom(&orom);
 583                         add_orom_device_id(csata, hba->dev_id);
 584                         csata->type = hba->type;
 585                         return &csata->orom;
 586                 }
 587         }
 588
 589         if (hba->type == SYS_DEV_VMD) {
 590                 err = read_efi_variable(&orom, sizeof(orom), VMD_PROP, VENDOR_GUID);
 591         }
 592
 593         if (err)
 594                 return NULL;
 595
 596         ret = add_orom(&orom);
 597         add_orom_device_id(ret, hba->dev_id);
 598         ret->type = hba->type;
 599
 600         return &ret->orom;
 601 }
 602
 603 const struct imsm_orom *find_imsm_nvme(struct sys_dev *hba)
 604 {
 605         static struct orom_entry *nvme_orom;
 606
 607         if (hba->type != SYS_DEV_NVME)
 608                 return NULL;
 609
 610         if (!nvme_orom) {
 611                 struct imsm_orom nvme_orom_compat = {
 612                         .signature = IMSM_NVME_OROM_COMPAT_SIGNATURE,
 613                         .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
 614                                                 IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5,
 615                         .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
 616                                                 IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
 617                                                 IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB,
 618                         .dpa = IMSM_OROM_DISKS_PER_ARRAY_NVME,
 619                         .tds = IMSM_OROM_TOTAL_DISKS_NVME,
 620                         .vpa = IMSM_OROM_VOLUMES_PER_ARRAY,
 621                         .vphba = IMSM_OROM_TOTAL_DISKS_NVME / 2 * IMSM_OROM_VOLUMES_PER_ARRAY,
 622                         .attr = IMSM_OROM_ATTR_2TB | IMSM_OROM_ATTR_2TB_DISK,
 623                         .driver_features = IMSM_OROM_CAPABILITIES_EnterpriseSystem
 624                 };
 625                 nvme_orom = add_orom(&nvme_orom_compat);
 626         }
 627         add_orom_device_id(nvme_orom, hba->dev_id);
 628         nvme_orom->type = SYS_DEV_NVME;
 629         return &nvme_orom->orom;
 630 }
 631
 632 const struct imsm_orom *find_imsm_capability(struct sys_dev *hba)
 633 {
 634         const struct imsm_orom *cap = get_orom_by_device_id(hba->dev_id);
 635
 636         if (cap)
 637                 return cap;
 638
 639         if (hba->type == SYS_DEV_NVME)
 640                 return find_imsm_nvme(hba);
 641         if ((cap = find_imsm_efi(hba)) != NULL)
 642                 return cap;
 643         if ((cap = find_imsm_hba_orom(hba)) != NULL)
 644                 return cap;
 645
 646         return NULL;
 647 }
 648
 649 char *devt_to_devpath(dev_t dev)
 650 {
 651         char device[46];
 652
 653         sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
 654         return realpath(device, NULL);
 655 }
 656
 657 char *diskfd_to_devpath(int fd)
 658 {
 659         /* return the device path for a disk, return NULL on error or fd
 660          * refers to a partition
 661          */
 662         struct stat st;
 663
 664         if (fstat(fd, &st) != 0)
 665                 return NULL;
 666         if (!S_ISBLK(st.st_mode))
 667                 return NULL;
 668
 669         return devt_to_devpath(st.st_rdev);
 670 }
 671
 672 int path_attached_to_hba(const char *disk_path, const char *hba_path)
 673 {
 674         int rc;
 675
 676         if (check_env("IMSM_TEST_AHCI_DEV") ||
 677             check_env("IMSM_TEST_SCU_DEV")) {
 678                 return 1;
 679         }
 680
 681         if (!disk_path || !hba_path)
 682                 return 0;
 683         dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
 684         if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
 685                 rc = 1;
 686         else
 687                 rc = 0;
 688
 689         return rc;
 690 }
 691
 692 int devt_attached_to_hba(dev_t dev, const char *hba_path)
 693 {
 694         char *disk_path = devt_to_devpath(dev);
 695         int rc = path_attached_to_hba(disk_path, hba_path);
 696
 697         if (disk_path)
 698                 free(disk_path);
 699
 700         return rc;
 701 }
 702
 703 int disk_attached_to_hba(int fd, const char *hba_path)
 704 {
 705         char *disk_path = diskfd_to_devpath(fd);
 706         int rc = path_attached_to_hba(disk_path, hba_path);
 707
 708         if (disk_path)
 709                 free(disk_path);
 710
 711         return rc;
 712 }
 713
 714 char *vmd_domain_to_controller(struct sys_dev *hba, char *buf)
 715 {
 716         struct dirent *ent;
 717         DIR *dir;
 718         char path[PATH_MAX];
 719
 720         if (!hba)
 721                 return NULL;
 722
 723         if (hba->type != SYS_DEV_VMD)
 724                 return NULL;
 725
 726         dir = opendir("/sys/bus/pci/drivers/vmd");
 727         if (!dir)
 728                 return NULL;
 729
 730         for (ent = readdir(dir); ent; ent = readdir(dir)) {
 731                 sprintf(path, "/sys/bus/pci/drivers/vmd/%s/domain/device",
 732                         ent->d_name);
 733
 734                 if (!realpath(path, buf))
 735                         continue;
 736
 737                 if (strncmp(buf, hba->path, strlen(buf)) == 0) {
 738                         sprintf(path, "/sys/bus/pci/drivers/vmd/%s", ent->d_name);
 739                         closedir(dir);
 740                         return realpath(path, buf);
 741                 }
 742         }
 743
 744         closedir(dir);
 745         return NULL;
 746 }