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b390f610 DW |
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> | |
fc13853f LM |
31 | #include <limits.h> |
32 | ||
d835518b BK |
33 | #define NVME_SUBSYS_PATH "/sys/devices/virtual/nvme-subsystem/" |
34 | ||
9c747fa0 LM |
35 | static int devpath_to_ll(const char *dev_path, const char *entry, |
36 | unsigned long long *val); | |
37 | ||
9bc4ae77 | 38 | static void free_sys_dev(struct sys_dev **list) |
b390f610 DW |
39 | { |
40 | while (*list) { | |
41 | struct sys_dev *next = (*list)->next; | |
42 | ||
43 | if ((*list)->path) | |
44 | free((*list)->path); | |
45 | free(*list); | |
46 | *list = next; | |
47 | } | |
48 | } | |
49 | ||
50 | struct sys_dev *find_driver_devices(const char *bus, const char *driver) | |
51 | { | |
52 | /* search sysfs for devices driven by 'driver' */ | |
30730cb8 AO |
53 | char path[PATH_MAX]; |
54 | char link[PATH_MAX]; | |
55 | char *c, *p; | |
b390f610 DW |
56 | DIR *driver_dir; |
57 | struct dirent *de; | |
58 | struct sys_dev *head = NULL; | |
59 | struct sys_dev *list = NULL; | |
60f0f54d | 60 | struct sys_dev *vmd = NULL; |
a8e5382a | 61 | enum sys_dev_type type; |
9c747fa0 | 62 | unsigned long long dev_id; |
6b781d33 | 63 | unsigned long long class; |
a8e5382a LM |
64 | |
65 | if (strcmp(driver, "isci") == 0) | |
66 | type = SYS_DEV_SAS; | |
75350d87 KF |
67 | else if (strcmp(driver, "ahci") == 0) { |
68 | vmd = find_driver_devices("pci", "vmd"); | |
a8e5382a | 69 | type = SYS_DEV_SATA; |
75350d87 | 70 | } else if (strcmp(driver, "nvme") == 0) { |
60f0f54d PB |
71 | /* if looking for nvme devs, first look for vmd */ |
72 | vmd = find_driver_devices("pci", "vmd"); | |
614902f6 | 73 | type = SYS_DEV_NVME; |
60f0f54d PB |
74 | } else if (strcmp(driver, "vmd") == 0) |
75 | type = SYS_DEV_VMD; | |
a8e5382a LM |
76 | else |
77 | type = SYS_DEV_UNKNOWN; | |
b390f610 DW |
78 | |
79 | sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver); | |
80 | driver_dir = opendir(path); | |
60f0f54d PB |
81 | if (!driver_dir) { |
82 | if (vmd) | |
83 | free_sys_dev(&vmd); | |
b390f610 | 84 | return NULL; |
60f0f54d | 85 | } |
b390f610 | 86 | for (de = readdir(driver_dir); de; de = readdir(driver_dir)) { |
5a1920f2 | 87 | int n; |
60f0f54d | 88 | int skip = 0; |
5a1920f2 | 89 | |
b390f610 DW |
90 | /* is 'de' a device? check that the 'subsystem' link exists and |
91 | * that its target matches 'bus' | |
92 | */ | |
93 | sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem", | |
94 | bus, driver, de->d_name); | |
5a1920f2 | 95 | n = readlink(path, link, sizeof(link)); |
f21e18ca | 96 | if (n < 0 || n >= (int)sizeof(link)) |
b390f610 | 97 | continue; |
5a1920f2 | 98 | link[n] = '\0'; |
b390f610 DW |
99 | c = strrchr(link, '/'); |
100 | if (!c) | |
101 | continue; | |
102 | if (strncmp(bus, c+1, strlen(bus)) != 0) | |
103 | continue; | |
104 | ||
a8e5382a LM |
105 | sprintf(path, "/sys/bus/%s/drivers/%s/%s", |
106 | bus, driver, de->d_name); | |
107 | ||
60f0f54d PB |
108 | /* if searching for nvme - skip vmd connected one */ |
109 | if (type == SYS_DEV_NVME) { | |
110 | struct sys_dev *dev; | |
111 | char *rp = realpath(path, NULL); | |
112 | for (dev = vmd; dev; dev = dev->next) { | |
113 | if ((strncmp(dev->path, rp, strlen(dev->path)) == 0)) | |
114 | skip = 1; | |
115 | } | |
116 | free(rp); | |
117 | } | |
118 | ||
75350d87 KF |
119 | /* change sata type if under a vmd controller */ |
120 | if (type == SYS_DEV_SATA) { | |
121 | struct sys_dev *dev; | |
122 | char *rp = realpath(path, NULL); | |
123 | for (dev = vmd; dev; dev = dev->next) { | |
124 | if ((strncmp(dev->path, rp, strlen(dev->path)) == 0)) | |
125 | type = SYS_DEV_SATA_VMD; | |
126 | } | |
127 | free(rp); | |
128 | } | |
129 | ||
60f0f54d PB |
130 | /* if it's not Intel device or mark as VMD connected - skip it. */ |
131 | if (devpath_to_vendor(path) != 0x8086 || skip == 1) | |
a8e5382a LM |
132 | continue; |
133 | ||
9c747fa0 LM |
134 | if (devpath_to_ll(path, "device", &dev_id) != 0) |
135 | continue; | |
136 | ||
6b781d33 AP |
137 | if (devpath_to_ll(path, "class", &class) != 0) |
138 | continue; | |
139 | ||
30730cb8 AO |
140 | /* |
141 | * Each VMD device (domain) adds separate PCI bus, it is better | |
142 | * to store path as a path to that bus (easier further | |
143 | * determination which NVMe dev is connected to this particular | |
144 | * VMD domain). | |
145 | */ | |
146 | if (type == SYS_DEV_VMD) { | |
147 | sprintf(path, "/sys/bus/%s/drivers/%s/%s/domain/device", | |
148 | bus, driver, de->d_name); | |
149 | } | |
150 | p = realpath(path, NULL); | |
151 | if (p == NULL) { | |
152 | pr_err("Unable to get real path for '%s'\n", path); | |
153 | continue; | |
154 | } | |
155 | ||
b390f610 DW |
156 | /* start / add list entry */ |
157 | if (!head) { | |
503975b9 | 158 | head = xmalloc(sizeof(*head)); |
b390f610 DW |
159 | list = head; |
160 | } else { | |
503975b9 | 161 | list->next = xmalloc(sizeof(*head)); |
b390f610 DW |
162 | list = list->next; |
163 | } | |
164 | ||
165 | if (!list) { | |
166 | free_sys_dev(&head); | |
167 | break; | |
168 | } | |
169 | ||
9c747fa0 | 170 | list->dev_id = (__u16) dev_id; |
6b781d33 | 171 | list->class = (__u32) class; |
a8e5382a | 172 | list->type = type; |
b390f610 | 173 | list->next = NULL; |
30730cb8 AO |
174 | list->path = p; |
175 | ||
a8e5382a LM |
176 | if ((list->pci_id = strrchr(list->path, '/')) != NULL) |
177 | list->pci_id++; | |
b390f610 | 178 | } |
2a17c77b | 179 | closedir(driver_dir); |
60f0f54d | 180 | |
75350d87 KF |
181 | /* nvme vmd needs a list separate from sata vmd */ |
182 | if (vmd && type == SYS_DEV_NVME) { | |
60f0f54d PB |
183 | if (list) |
184 | list->next = vmd; | |
185 | else | |
186 | head = vmd; | |
187 | } | |
188 | ||
b390f610 DW |
189 | return head; |
190 | } | |
191 | ||
9c747fa0 | 192 | static struct sys_dev *intel_devices=NULL; |
9bc4ae77 | 193 | static time_t valid_time = 0; |
9c747fa0 | 194 | |
0858eccf AP |
195 | struct sys_dev *device_by_id(__u16 device_id) |
196 | { | |
197 | struct sys_dev *iter; | |
198 | ||
199 | for (iter = intel_devices; iter != NULL; iter = iter->next) | |
200 | if (iter->dev_id == device_id) | |
201 | return iter; | |
202 | return NULL; | |
203 | } | |
204 | ||
d3c11416 AO |
205 | struct sys_dev *device_by_id_and_path(__u16 device_id, const char *path) |
206 | { | |
207 | struct sys_dev *iter; | |
208 | ||
209 | for (iter = intel_devices; iter != NULL; iter = iter->next) | |
210 | if ((iter->dev_id == device_id) && strstr(iter->path, path)) | |
211 | return iter; | |
212 | return NULL; | |
213 | } | |
214 | ||
9c747fa0 LM |
215 | static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val) |
216 | { | |
dd5ab402 | 217 | char path[strnlen(dev_path, PATH_MAX) + strnlen(entry, PATH_MAX) + 2]; |
9c747fa0 LM |
218 | int fd; |
219 | int n; | |
220 | ||
221 | sprintf(path, "%s/%s", dev_path, entry); | |
222 | ||
223 | fd = open(path, O_RDONLY); | |
224 | if (fd < 0) | |
225 | return -1; | |
226 | n = sysfs_fd_get_ll(fd, val); | |
227 | close(fd); | |
228 | return n; | |
229 | } | |
230 | ||
60f0f54d | 231 | __u16 devpath_to_vendor(const char *dev_path) |
b390f610 DW |
232 | { |
233 | char path[strlen(dev_path) + strlen("/vendor") + 1]; | |
234 | char vendor[7]; | |
235 | int fd; | |
236 | __u16 id = 0xffff; | |
237 | int n; | |
238 | ||
239 | sprintf(path, "%s/vendor", dev_path); | |
240 | ||
241 | fd = open(path, O_RDONLY); | |
242 | if (fd < 0) | |
243 | return 0xffff; | |
244 | ||
245 | n = read(fd, vendor, sizeof(vendor)); | |
246 | if (n == sizeof(vendor)) { | |
247 | vendor[n - 1] = '\0'; | |
248 | id = strtoul(vendor, NULL, 16); | |
249 | } | |
250 | close(fd); | |
251 | ||
252 | return id; | |
253 | } | |
254 | ||
fcebeb77 MT |
255 | /* Description: Read text value of dev_path/entry field |
256 | * Parameters: | |
257 | * dev_path - sysfs path to the device | |
258 | * entry - entry to be read | |
259 | * buf - buffer for read value | |
260 | * len - size of buf | |
261 | * verbose - error logging level | |
262 | */ | |
263 | int devpath_to_char(const char *dev_path, const char *entry, char *buf, int len, | |
264 | int verbose) | |
265 | { | |
266 | char path[PATH_MAX]; | |
267 | ||
268 | snprintf(path, sizeof(path), "%s/%s", dev_path, entry); | |
269 | if (load_sys(path, buf, len)) { | |
270 | if (verbose) | |
271 | pr_err("Cannot read %s, aborting\n", path); | |
272 | return 1; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
a8e5382a | 278 | struct sys_dev *find_intel_devices(void) |
b390f610 | 279 | { |
614902f6 | 280 | struct sys_dev *ahci, *isci, *nvme; |
a8e5382a | 281 | |
9bc4ae77 N |
282 | if (valid_time > time(0) - 10) |
283 | return intel_devices; | |
284 | ||
285 | if (intel_devices) | |
286 | free_sys_dev(&intel_devices); | |
287 | ||
a8e5382a | 288 | isci = find_driver_devices("pci", "isci"); |
75350d87 | 289 | /* Searching for AHCI will return list of SATA and SATA VMD controllers */ |
a8e5382a | 290 | ahci = find_driver_devices("pci", "ahci"); |
60f0f54d | 291 | /* Searching for NVMe will return list of NVMe and VMD controllers */ |
614902f6 | 292 | nvme = find_driver_devices("pci", "nvme"); |
a8e5382a | 293 | |
614902f6 PB |
294 | if (!isci && !ahci) { |
295 | ahci = nvme; | |
296 | } else if (!ahci) { | |
a8e5382a | 297 | ahci = isci; |
614902f6 PB |
298 | struct sys_dev *elem = ahci; |
299 | while (elem->next) | |
300 | elem = elem->next; | |
301 | elem->next = nvme; | |
a8e5382a LM |
302 | } else { |
303 | struct sys_dev *elem = ahci; | |
304 | while (elem->next) | |
305 | elem = elem->next; | |
306 | elem->next = isci; | |
614902f6 PB |
307 | while (elem->next) |
308 | elem = elem->next; | |
309 | elem->next = nvme; | |
a8e5382a | 310 | } |
9bc4ae77 N |
311 | intel_devices = ahci; |
312 | valid_time = time(0); | |
313 | return intel_devices; | |
b390f610 DW |
314 | } |
315 | ||
3c8bfb5d | 316 | /* |
fc13853f | 317 | * PCI Expansion ROM Data Structure Format */ |
3c8bfb5d LM |
318 | struct pciExpDataStructFormat { |
319 | __u8 ver[4]; | |
320 | __u16 vendorID; | |
321 | __u16 deviceID; | |
6b781d33 | 322 | __u16 devListOffset; |
f666bcc6 PB |
323 | __u16 pciDataStructLen; |
324 | __u8 pciDataStructRev; | |
3c8bfb5d LM |
325 | } __attribute__ ((packed)); |
326 | ||
5e1d6128 | 327 | struct orom_entry *orom_entries; |
0858eccf | 328 | |
72a45777 | 329 | const struct orom_entry *get_orom_entry_by_device_id(__u16 dev_id) |
6b781d33 | 330 | { |
5e1d6128 AP |
331 | struct orom_entry *entry; |
332 | struct devid_list *devid; | |
6b781d33 | 333 | |
5e1d6128 AP |
334 | for (entry = orom_entries; entry; entry = entry->next) { |
335 | for (devid = entry->devid_list; devid; devid = devid->next) { | |
336 | if (devid->devid == dev_id) | |
72a45777 | 337 | return entry; |
6b781d33 AP |
338 | } |
339 | } | |
5e1d6128 | 340 | |
6b781d33 AP |
341 | return NULL; |
342 | } | |
343 | ||
72a45777 PB |
344 | const struct imsm_orom *get_orom_by_device_id(__u16 dev_id) |
345 | { | |
346 | const struct orom_entry *entry = get_orom_entry_by_device_id(dev_id); | |
347 | ||
348 | if (entry) | |
349 | return &entry->orom; | |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
5e1d6128 | 354 | static struct orom_entry *add_orom(const struct imsm_orom *orom) |
6b781d33 | 355 | { |
5e1d6128 AP |
356 | struct orom_entry *list; |
357 | struct orom_entry *prev = NULL; | |
358 | ||
359 | for (list = orom_entries; list; prev = list, list = list->next) | |
360 | ; | |
361 | ||
362 | list = xmalloc(sizeof(struct orom_entry)); | |
363 | list->orom = *orom; | |
364 | list->devid_list = NULL; | |
365 | list->next = NULL; | |
366 | ||
367 | if (prev == NULL) | |
368 | orom_entries = list; | |
369 | else | |
370 | prev->next = list; | |
371 | ||
372 | return list; | |
6b781d33 AP |
373 | } |
374 | ||
5e1d6128 | 375 | static void add_orom_device_id(struct orom_entry *entry, __u16 dev_id) |
6b781d33 | 376 | { |
6b781d33 AP |
377 | struct devid_list *list; |
378 | struct devid_list *prev = NULL; | |
379 | ||
5e1d6128 AP |
380 | for (list = entry->devid_list; list; prev = list, list = list->next) { |
381 | if (list->devid == dev_id) | |
6b781d33 | 382 | return; |
6b781d33 | 383 | } |
5e1d6128 AP |
384 | list = xmalloc(sizeof(struct devid_list)); |
385 | list->devid = dev_id; | |
386 | list->next = NULL; | |
387 | ||
388 | if (prev == NULL) | |
389 | entry->devid_list = list; | |
390 | else | |
391 | prev->next = list; | |
6b781d33 | 392 | } |
fc13853f | 393 | |
3c8bfb5d | 394 | static int scan(const void *start, const void *end, const void *data) |
b390f610 DW |
395 | { |
396 | int offset; | |
6b781d33 | 397 | const struct imsm_orom *imsm_mem = NULL; |
b390f610 | 398 | int len = (end - start); |
3c8bfb5d LM |
399 | struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data; |
400 | ||
9c747fa0 LM |
401 | if (data + 0x18 > end) { |
402 | dprintf("cannot find pciExpDataStruct \n"); | |
403 | return 0; | |
404 | } | |
405 | ||
3c8bfb5d LM |
406 | dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n", |
407 | (ulong) __le16_to_cpu(ptr->vendorID), | |
408 | (ulong) __le16_to_cpu(ptr->deviceID)); | |
409 | ||
6b781d33 | 410 | if (__le16_to_cpu(ptr->vendorID) != 0x8086) |
3c8bfb5d | 411 | return 0; |
b390f610 | 412 | |
5c4cc0c8 RS |
413 | if (get_orom_by_device_id(ptr->deviceID)) |
414 | return 0; | |
415 | ||
b390f610 | 416 | for (offset = 0; offset < len; offset += 4) { |
6b781d33 AP |
417 | const void *mem = start + offset; |
418 | ||
419 | if ((memcmp(mem, IMSM_OROM_SIGNATURE, 4) == 0)) { | |
420 | imsm_mem = mem; | |
421 | break; | |
b390f610 DW |
422 | } |
423 | } | |
6b781d33 AP |
424 | |
425 | if (!imsm_mem) | |
426 | return 0; | |
427 | ||
5e1d6128 | 428 | struct orom_entry *orom = add_orom(imsm_mem); |
6b781d33 | 429 | |
f666bcc6 PB |
430 | /* only PciDataStructure with revision 3 and above supports devices list. */ |
431 | if (ptr->pciDataStructRev >= 3 && ptr->devListOffset) { | |
6b781d33 AP |
432 | const __u16 *dev_list = (void *)ptr + ptr->devListOffset; |
433 | int i; | |
434 | ||
435 | for (i = 0; dev_list[i] != 0; i++) | |
436 | add_orom_device_id(orom, dev_list[i]); | |
437 | } else { | |
438 | add_orom_device_id(orom, __le16_to_cpu(ptr->deviceID)); | |
439 | } | |
440 | ||
b390f610 DW |
441 | return 0; |
442 | } | |
443 | ||
6b781d33 | 444 | const struct imsm_orom *imsm_platform_test(struct sys_dev *hba) |
fc13853f | 445 | { |
6b781d33 AP |
446 | struct imsm_orom orom = { |
447 | .signature = IMSM_OROM_SIGNATURE, | |
448 | .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
449 | IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5, | |
450 | .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB | | |
451 | IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB | | |
452 | IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB | | |
453 | IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB | | |
454 | IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB, | |
455 | .dpa = IMSM_OROM_DISKS_PER_ARRAY, | |
456 | .tds = IMSM_OROM_TOTAL_DISKS, | |
457 | .vpa = IMSM_OROM_VOLUMES_PER_ARRAY, | |
458 | .vphba = IMSM_OROM_VOLUMES_PER_HBA | |
459 | }; | |
460 | orom.attr = orom.rlc | IMSM_OROM_ATTR_ChecksumVerify; | |
fc13853f LM |
461 | |
462 | if (check_env("IMSM_TEST_OROM_NORAID5")) { | |
6b781d33 | 463 | orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | |
fc13853f LM |
464 | IMSM_OROM_RLC_RAID10; |
465 | } | |
6b781d33 AP |
466 | if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba->type == SYS_DEV_SAS)) { |
467 | orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
fc13853f LM |
468 | IMSM_OROM_RLC_RAID10; |
469 | } | |
6b781d33 AP |
470 | if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba->type == SYS_DEV_SATA)) { |
471 | orom.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
fc13853f | 472 | IMSM_OROM_RLC_RAID10; |
cceebc67 DW |
473 | } |
474 | ||
5e1d6128 | 475 | struct orom_entry *ret = add_orom(&orom); |
6b781d33 AP |
476 | |
477 | add_orom_device_id(ret, hba->dev_id); | |
478 | ||
5e1d6128 | 479 | return &ret->orom; |
fc13853f LM |
480 | } |
481 | ||
6b781d33 | 482 | static const struct imsm_orom *find_imsm_hba_orom(struct sys_dev *hba) |
fc13853f LM |
483 | { |
484 | unsigned long align; | |
485 | ||
6b781d33 AP |
486 | if (check_env("IMSM_TEST_OROM")) |
487 | return imsm_platform_test(hba); | |
fc13853f | 488 | |
fc13853f | 489 | /* return empty OROM capabilities in EFI test mode */ |
6b781d33 | 490 | if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI")) |
fc13853f LM |
491 | return NULL; |
492 | ||
9bc4ae77 | 493 | find_intel_devices(); |
9c747fa0 LM |
494 | |
495 | if (intel_devices == NULL) | |
b390f610 DW |
496 | return NULL; |
497 | ||
498 | /* scan option-rom memory looking for an imsm signature */ | |
969c2555 DW |
499 | if (check_env("IMSM_SAFE_OROM_SCAN")) |
500 | align = 2048; | |
501 | else | |
502 | align = 512; | |
503 | if (probe_roms_init(align) != 0) | |
b390f610 DW |
504 | return NULL; |
505 | probe_roms(); | |
9c747fa0 | 506 | /* ignore return value - True is returned if both adapater roms are found */ |
fc13853f | 507 | scan_adapter_roms(scan); |
b390f610 DW |
508 | probe_roms_exit(); |
509 | ||
6b781d33 | 510 | return get_orom_by_device_id(hba->dev_id); |
fc13853f LM |
511 | } |
512 | ||
1a901471 LM |
513 | #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ |
514 | ((struct efi_guid) \ | |
515 | {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ | |
516 | (b) & 0xff, ((b) >> 8) & 0xff, \ | |
517 | (c) & 0xff, ((c) >> 8) & 0xff, \ | |
518 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) | |
fc13853f | 519 | |
5a6baf66 | 520 | #define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars" |
88605db9 | 521 | #define SYS_EFIVARS_PATH "/sys/firmware/efi/efivars" |
5a6baf66 LM |
522 | #define SCU_PROP "RstScuV" |
523 | #define AHCI_PROP "RstSataV" | |
81188ef8 | 524 | #define AHCI_SSATA_PROP "RstsSatV" |
f94df5cf | 525 | #define AHCI_TSATA_PROP "RsttSatV" |
ea7a02a3 OJ |
526 | #define VROC_VMD_PROP "RstUefiV" |
527 | #define RST_VMD_PROP "RstVmdV" | |
5a6baf66 LM |
528 | |
529 | #define VENDOR_GUID \ | |
530 | EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6) | |
531 | ||
6b781d33 | 532 | #define PCI_CLASS_RAID_CNTRL 0x010400 |
5a6baf66 | 533 | |
f94df5cf MT |
534 | static int read_efi_var(void *buffer, ssize_t buf_size, |
535 | const char *variable_name, struct efi_guid guid) | |
88605db9 AP |
536 | { |
537 | char path[PATH_MAX]; | |
538 | char buf[GUID_STR_MAX]; | |
539 | int fd; | |
540 | ssize_t n; | |
541 | ||
542 | snprintf(path, PATH_MAX, "%s/%s-%s", SYS_EFIVARS_PATH, variable_name, guid_str(buf, guid)); | |
543 | ||
544 | fd = open(path, O_RDONLY); | |
545 | if (fd < 0) | |
546 | return 1; | |
547 | ||
548 | /* read the variable attributes and ignore it */ | |
549 | n = read(fd, buf, sizeof(__u32)); | |
550 | if (n < 0) { | |
551 | close(fd); | |
552 | return 1; | |
553 | } | |
554 | ||
555 | /* read the variable data */ | |
556 | n = read(fd, buffer, buf_size); | |
557 | close(fd); | |
558 | if (n < buf_size) | |
559 | return 1; | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
f94df5cf MT |
564 | static int read_efi_variable(void *buffer, ssize_t buf_size, |
565 | const char *variable_name, struct efi_guid guid) | |
5a6baf66 | 566 | { |
5a6baf66 LM |
567 | char path[PATH_MAX]; |
568 | char buf[GUID_STR_MAX]; | |
aae4c111 HCP |
569 | int dfd; |
570 | ssize_t n, var_data_len; | |
571 | ||
88605db9 AP |
572 | /* Try to read the variable using the new efivarfs interface first. |
573 | * If that fails, fall back to the old sysfs-efivars interface. */ | |
574 | if (!read_efi_var(buffer, buf_size, variable_name, guid)) | |
575 | return 0; | |
576 | ||
aae4c111 HCP |
577 | snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid)); |
578 | ||
579 | dprintf("EFI VAR: path=%s\n", path); | |
580 | /* get size of variable data */ | |
581 | dfd = open(path, O_RDONLY); | |
582 | if (dfd < 0) | |
583 | return 1; | |
584 | ||
585 | n = read(dfd, &buf, sizeof(buf)); | |
586 | close(dfd); | |
587 | if (n < 0) | |
588 | return 1; | |
589 | buf[n] = '\0'; | |
590 | ||
591 | errno = 0; | |
592 | var_data_len = strtoul(buf, NULL, 16); | |
d7be7d87 JS |
593 | if ((errno == ERANGE && (var_data_len == LONG_MAX)) || |
594 | (errno != 0 && var_data_len == 0)) | |
aae4c111 HCP |
595 | return 1; |
596 | ||
597 | /* get data */ | |
598 | snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid)); | |
599 | ||
600 | dprintf("EFI VAR: path=%s\n", path); | |
601 | dfd = open(path, O_RDONLY); | |
602 | if (dfd < 0) | |
603 | return 1; | |
604 | ||
605 | n = read(dfd, buffer, buf_size); | |
606 | close(dfd); | |
607 | if (n != var_data_len || n < buf_size) { | |
608 | return 1; | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
5a6baf66 | 613 | |
6b781d33 | 614 | const struct imsm_orom *find_imsm_efi(struct sys_dev *hba) |
aae4c111 | 615 | { |
6b781d33 | 616 | struct imsm_orom orom; |
5e1d6128 | 617 | struct orom_entry *ret; |
f94df5cf MT |
618 | static const char * const sata_efivars[] = {AHCI_PROP, AHCI_SSATA_PROP, |
619 | AHCI_TSATA_PROP}; | |
ea7a02a3 | 620 | static const char * const vmd_efivars[] = {VROC_VMD_PROP, RST_VMD_PROP}; |
f94df5cf | 621 | unsigned long i; |
5a6baf66 | 622 | |
6b781d33 AP |
623 | if (check_env("IMSM_TEST_AHCI_EFI") || check_env("IMSM_TEST_SCU_EFI")) |
624 | return imsm_platform_test(hba); | |
5a6baf66 | 625 | |
5a6baf66 | 626 | /* OROM test is set, return that there is no EFI capabilities */ |
aae4c111 | 627 | if (check_env("IMSM_TEST_OROM")) |
5a6baf66 | 628 | return NULL; |
5a6baf66 | 629 | |
f94df5cf MT |
630 | switch (hba->type) { |
631 | case SYS_DEV_SAS: | |
632 | if (!read_efi_variable(&orom, sizeof(orom), SCU_PROP, | |
633 | VENDOR_GUID)) | |
634 | break; | |
81188ef8 | 635 | |
f94df5cf MT |
636 | return NULL; |
637 | case SYS_DEV_SATA: | |
638 | if (hba->class != PCI_CLASS_RAID_CNTRL) | |
639 | return NULL; | |
81188ef8 | 640 | |
f94df5cf MT |
641 | for (i = 0; i < ARRAY_SIZE(sata_efivars); i++) { |
642 | if (!read_efi_variable(&orom, sizeof(orom), | |
643 | sata_efivars[i], VENDOR_GUID)) | |
644 | break; | |
81188ef8 | 645 | |
81188ef8 | 646 | } |
f94df5cf MT |
647 | if (i == ARRAY_SIZE(sata_efivars)) |
648 | return NULL; | |
81188ef8 | 649 | |
f94df5cf MT |
650 | break; |
651 | case SYS_DEV_VMD: | |
75350d87 | 652 | case SYS_DEV_SATA_VMD: |
ea7a02a3 OJ |
653 | for (i = 0; i < ARRAY_SIZE(vmd_efivars); i++) { |
654 | if (!read_efi_variable(&orom, sizeof(orom), | |
655 | vmd_efivars[i], VENDOR_GUID)) | |
656 | break; | |
657 | } | |
658 | ||
659 | if (i == ARRAY_SIZE(vmd_efivars)) | |
660 | return NULL; | |
661 | ||
662 | break; | |
f94df5cf MT |
663 | default: |
664 | return NULL; | |
665 | } | |
5a6baf66 | 666 | |
6b781d33 AP |
667 | ret = add_orom(&orom); |
668 | add_orom_device_id(ret, hba->dev_id); | |
60f0f54d | 669 | ret->type = hba->type; |
6b781d33 | 670 | |
5e1d6128 | 671 | return &ret->orom; |
fc13853f LM |
672 | } |
673 | ||
614902f6 PB |
674 | const struct imsm_orom *find_imsm_nvme(struct sys_dev *hba) |
675 | { | |
5e1d6128 | 676 | static struct orom_entry *nvme_orom; |
614902f6 PB |
677 | |
678 | if (hba->type != SYS_DEV_NVME) | |
679 | return NULL; | |
680 | ||
681 | if (!nvme_orom) { | |
682 | struct imsm_orom nvme_orom_compat = { | |
683 | .signature = IMSM_NVME_OROM_COMPAT_SIGNATURE, | |
684 | .rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
685 | IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5, | |
686 | .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB | | |
687 | IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB | | |
688 | IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB, | |
689 | .dpa = IMSM_OROM_DISKS_PER_ARRAY_NVME, | |
690 | .tds = IMSM_OROM_TOTAL_DISKS_NVME, | |
691 | .vpa = IMSM_OROM_VOLUMES_PER_ARRAY, | |
692 | .vphba = IMSM_OROM_TOTAL_DISKS_NVME / 2 * IMSM_OROM_VOLUMES_PER_ARRAY, | |
693 | .attr = IMSM_OROM_ATTR_2TB | IMSM_OROM_ATTR_2TB_DISK, | |
0858eccf | 694 | .driver_features = IMSM_OROM_CAPABILITIES_EnterpriseSystem |
614902f6 PB |
695 | }; |
696 | nvme_orom = add_orom(&nvme_orom_compat); | |
697 | } | |
698 | add_orom_device_id(nvme_orom, hba->dev_id); | |
60f0f54d | 699 | nvme_orom->type = SYS_DEV_NVME; |
5e1d6128 | 700 | return &nvme_orom->orom; |
614902f6 PB |
701 | } |
702 | ||
8d1114be MG |
703 | #define VMD_REGISTER_OFFSET 0x3FC |
704 | #define VMD_REGISTER_SKU_SHIFT 1 | |
705 | #define VMD_REGISTER_SKU_MASK (0x00000007) | |
706 | #define VMD_REGISTER_SKU_PREMIUM 2 | |
707 | #define MD_REGISTER_VER_MAJOR_SHIFT 4 | |
708 | #define MD_REGISTER_VER_MAJOR_MASK (0x0000000F) | |
709 | #define MD_REGISTER_VER_MINOR_SHIFT 8 | |
710 | #define MD_REGISTER_VER_MINOR_MASK (0x0000000F) | |
711 | ||
712 | /* | |
713 | * read_vmd_register() - Reads VMD register and writes contents to buff ptr | |
714 | * @buff: buffer for vmd register data, should be the size of uint32_t | |
715 | * | |
716 | * Return: 0 on success, 1 on error | |
717 | */ | |
718 | int read_vmd_register(uint32_t *buff, struct sys_dev *hba) | |
719 | { | |
720 | int fd; | |
721 | char vmd_pci_config_path[PATH_MAX]; | |
722 | ||
723 | if (!vmd_domain_to_controller(hba, vmd_pci_config_path)) | |
724 | return 1; | |
725 | ||
726 | strncat(vmd_pci_config_path, "/config", PATH_MAX - strnlen(vmd_pci_config_path, PATH_MAX)); | |
727 | ||
728 | fd = open(vmd_pci_config_path, O_RDONLY); | |
729 | if (fd < 0) | |
730 | return 1; | |
731 | ||
732 | if (pread(fd, buff, sizeof(uint32_t), VMD_REGISTER_OFFSET) != sizeof(uint32_t)) { | |
733 | close(fd); | |
734 | return 1; | |
735 | } | |
736 | close(fd); | |
737 | return 0; | |
738 | } | |
739 | ||
740 | /* | |
741 | * add_vmd_orom() - Adds VMD orom cap to orom list, writes orom_entry ptr into vmd_orom | |
742 | * @vmd_orom: pointer to orom entry pointer | |
743 | * | |
744 | * Return: 0 on success, 1 on error | |
745 | */ | |
746 | int add_vmd_orom(struct orom_entry **vmd_orom, struct sys_dev *hba) | |
747 | { | |
748 | uint8_t sku; | |
749 | uint32_t vmd_register_data; | |
750 | struct imsm_orom vmd_orom_cap = { | |
751 | .signature = IMSM_VMD_OROM_COMPAT_SIGNATURE, | |
752 | .sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB | | |
753 | IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB | | |
754 | IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB, | |
755 | .dpa = IMSM_OROM_DISKS_PER_ARRAY_NVME, | |
756 | .tds = IMSM_OROM_TOTAL_DISKS_VMD, | |
757 | .vpa = IMSM_OROM_VOLUMES_PER_ARRAY, | |
758 | .vphba = IMSM_OROM_VOLUMES_PER_HBA_VMD, | |
759 | .attr = IMSM_OROM_ATTR_2TB | IMSM_OROM_ATTR_2TB_DISK, | |
760 | .driver_features = IMSM_OROM_CAPABILITIES_EnterpriseSystem | | |
761 | IMSM_OROM_CAPABILITIES_TPV | |
762 | }; | |
763 | ||
764 | if (read_vmd_register(&vmd_register_data, hba) != 0) | |
765 | return 1; | |
766 | ||
767 | sku = (uint8_t)((vmd_register_data >> VMD_REGISTER_SKU_SHIFT) & | |
768 | VMD_REGISTER_SKU_MASK); | |
769 | ||
770 | if (sku == VMD_REGISTER_SKU_PREMIUM) | |
771 | vmd_orom_cap.rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
772 | IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5; | |
773 | else | |
774 | vmd_orom_cap.rlc = IMSM_OROM_RLC_RAID_CNG; | |
775 | ||
776 | vmd_orom_cap.major_ver = (uint8_t) | |
777 | ((vmd_register_data >> MD_REGISTER_VER_MAJOR_SHIFT) & | |
778 | MD_REGISTER_VER_MAJOR_MASK); | |
779 | vmd_orom_cap.minor_ver = (uint8_t) | |
780 | ((vmd_register_data >> MD_REGISTER_VER_MINOR_SHIFT) & | |
781 | MD_REGISTER_VER_MINOR_MASK); | |
782 | ||
783 | *vmd_orom = add_orom(&vmd_orom_cap); | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
788 | const struct imsm_orom *find_imsm_vmd(struct sys_dev *hba) | |
789 | { | |
790 | static struct orom_entry *vmd_orom; | |
791 | ||
792 | if (hba->type != SYS_DEV_VMD) | |
793 | return NULL; | |
794 | ||
795 | if (!vmd_orom && add_vmd_orom(&vmd_orom, hba) != 0) | |
796 | return NULL; | |
797 | ||
798 | add_orom_device_id(vmd_orom, hba->dev_id); | |
799 | vmd_orom->type = SYS_DEV_VMD; | |
800 | return &vmd_orom->orom; | |
801 | } | |
802 | ||
6b781d33 | 803 | const struct imsm_orom *find_imsm_capability(struct sys_dev *hba) |
fc13853f | 804 | { |
6b781d33 AP |
805 | const struct imsm_orom *cap = get_orom_by_device_id(hba->dev_id); |
806 | ||
807 | if (cap) | |
808 | return cap; | |
fc13853f | 809 | |
614902f6 PB |
810 | if (hba->type == SYS_DEV_NVME) |
811 | return find_imsm_nvme(hba); | |
8d1114be MG |
812 | |
813 | cap = find_imsm_efi(hba); | |
814 | if (cap) | |
5a6baf66 | 815 | return cap; |
8d1114be MG |
816 | |
817 | if (hba->type == SYS_DEV_VMD) { | |
818 | cap = find_imsm_vmd(hba); | |
819 | if (cap) | |
820 | return cap; | |
821 | } | |
822 | ||
823 | cap = find_imsm_hba_orom(hba); | |
824 | if (cap) | |
fc13853f | 825 | return cap; |
614902f6 | 826 | |
b390f610 DW |
827 | return NULL; |
828 | } | |
25921536 | 829 | |
d835518b BK |
830 | /* Check whether the nvme device is represented by nvme subsytem, |
831 | * if yes virtual path should be changed to hardware device path, | |
832 | * to allow IMSM capabilities detection. | |
833 | * Returns: | |
834 | * hardware path to device - if the device is represented via | |
835 | * nvme virtual subsytem | |
836 | * NULL - if the device is not represented via nvme virtual subsytem | |
837 | */ | |
838 | char *get_nvme_multipath_dev_hw_path(const char *dev_path) | |
839 | { | |
840 | DIR *dir; | |
841 | struct dirent *ent; | |
842 | char *rp = NULL; | |
843 | ||
844 | if (strncmp(dev_path, NVME_SUBSYS_PATH, strlen(NVME_SUBSYS_PATH)) != 0) | |
845 | return NULL; | |
846 | ||
847 | dir = opendir(dev_path); | |
848 | if (!dir) | |
849 | return NULL; | |
850 | ||
851 | for (ent = readdir(dir); ent; ent = readdir(dir)) { | |
852 | char buf[strlen(dev_path) + strlen(ent->d_name) + 1]; | |
853 | ||
854 | /* Check if dir is a controller, ignore namespaces*/ | |
855 | if (!(strncmp(ent->d_name, "nvme", 4) == 0) || | |
856 | (strrchr(ent->d_name, 'n') != &ent->d_name[0])) | |
857 | continue; | |
858 | ||
859 | sprintf(buf, "%s/%s", dev_path, ent->d_name); | |
860 | rp = realpath(buf, NULL); | |
861 | break; | |
862 | } | |
863 | ||
864 | closedir(dir); | |
865 | return rp; | |
866 | } | |
867 | ||
7c798f87 MT |
868 | /* Description: Return part or whole realpath for the dev |
869 | * Parameters: | |
870 | * dev - the device to be quered | |
871 | * dev_level - level of "/device" entries. It allows to caller to access | |
872 | * virtual or physical devices which are on "path" to quered | |
873 | * one. | |
874 | * buf - optional, must be PATH_MAX size. If set, then will be used. | |
875 | */ | |
876 | char *devt_to_devpath(dev_t dev, int dev_level, char *buf) | |
25921536 | 877 | { |
7c798f87 MT |
878 | char device[PATH_MAX]; |
879 | char *hw_path; | |
880 | int i; | |
881 | unsigned long device_free_len = sizeof(device) - 1; | |
882 | char dev_str[] = "/device"; | |
883 | unsigned long dev_str_len = strlen(dev_str); | |
884 | ||
885 | snprintf(device, sizeof(device), "/sys/dev/block/%d:%d", major(dev), | |
886 | minor(dev)); | |
887 | ||
888 | /* If caller wants block device, return path to it even if it is exposed | |
889 | * via virtual layer. | |
890 | */ | |
891 | if (dev_level == 0) | |
892 | return realpath(device, buf); | |
25921536 | 893 | |
7c798f87 MT |
894 | device_free_len -= strlen(device); |
895 | for (i = 0; i < dev_level; i++) { | |
896 | if (device_free_len < dev_str_len) | |
897 | return NULL; | |
d835518b | 898 | |
7c798f87 | 899 | strncat(device, dev_str, device_free_len); |
d835518b | 900 | |
7c798f87 MT |
901 | /* Resolve nvme-subsystem abstraction if needed |
902 | */ | |
903 | device_free_len -= dev_str_len; | |
904 | if (i == 0) { | |
905 | char rp[PATH_MAX]; | |
906 | ||
907 | if (!realpath(device, rp)) | |
908 | return NULL; | |
909 | hw_path = get_nvme_multipath_dev_hw_path(rp); | |
910 | if (hw_path) { | |
911 | strcpy(device, hw_path); | |
912 | device_free_len = sizeof(device) - | |
913 | strlen(device) - 1; | |
914 | free(hw_path); | |
915 | } | |
916 | } | |
d835518b BK |
917 | } |
918 | ||
7c798f87 | 919 | return realpath(device, buf); |
25921536 DW |
920 | } |
921 | ||
7c798f87 | 922 | char *diskfd_to_devpath(int fd, int dev_level, char *buf) |
25921536 DW |
923 | { |
924 | /* return the device path for a disk, return NULL on error or fd | |
925 | * refers to a partition | |
926 | */ | |
927 | struct stat st; | |
928 | ||
929 | if (fstat(fd, &st) != 0) | |
930 | return NULL; | |
931 | if (!S_ISBLK(st.st_mode)) | |
932 | return NULL; | |
933 | ||
7c798f87 | 934 | return devt_to_devpath(st.st_rdev, dev_level, buf); |
25921536 DW |
935 | } |
936 | ||
937 | int path_attached_to_hba(const char *disk_path, const char *hba_path) | |
938 | { | |
939 | int rc; | |
940 | ||
fc13853f LM |
941 | if (check_env("IMSM_TEST_AHCI_DEV") || |
942 | check_env("IMSM_TEST_SCU_DEV")) { | |
943 | return 1; | |
944 | } | |
945 | ||
25921536 DW |
946 | if (!disk_path || !hba_path) |
947 | return 0; | |
a8e5382a | 948 | dprintf("hba: %s - disk: %s\n", hba_path, disk_path); |
25921536 DW |
949 | if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0) |
950 | rc = 1; | |
951 | else | |
952 | rc = 0; | |
953 | ||
954 | return rc; | |
955 | } | |
956 | ||
957 | int devt_attached_to_hba(dev_t dev, const char *hba_path) | |
958 | { | |
7c798f87 | 959 | char *disk_path = devt_to_devpath(dev, 1, NULL); |
25921536 DW |
960 | int rc = path_attached_to_hba(disk_path, hba_path); |
961 | ||
962 | if (disk_path) | |
963 | free(disk_path); | |
964 | ||
965 | return rc; | |
966 | } | |
967 | ||
968 | int disk_attached_to_hba(int fd, const char *hba_path) | |
969 | { | |
7c798f87 | 970 | char *disk_path = diskfd_to_devpath(fd, 1, NULL); |
25921536 DW |
971 | int rc = path_attached_to_hba(disk_path, hba_path); |
972 | ||
973 | if (disk_path) | |
974 | free(disk_path); | |
975 | ||
976 | return rc; | |
977 | } | |
60f0f54d PB |
978 | |
979 | char *vmd_domain_to_controller(struct sys_dev *hba, char *buf) | |
980 | { | |
981 | struct dirent *ent; | |
982 | DIR *dir; | |
983 | char path[PATH_MAX]; | |
984 | ||
985 | if (!hba) | |
986 | return NULL; | |
987 | ||
988 | if (hba->type != SYS_DEV_VMD) | |
989 | return NULL; | |
990 | ||
991 | dir = opendir("/sys/bus/pci/drivers/vmd"); | |
b9135011 JS |
992 | if (!dir) |
993 | return NULL; | |
60f0f54d | 994 | |
b9135011 | 995 | for (ent = readdir(dir); ent; ent = readdir(dir)) { |
60f0f54d PB |
996 | sprintf(path, "/sys/bus/pci/drivers/vmd/%s/domain/device", |
997 | ent->d_name); | |
998 | ||
999 | if (!realpath(path, buf)) | |
1000 | continue; | |
1001 | ||
1002 | if (strncmp(buf, hba->path, strlen(buf)) == 0) { | |
1003 | sprintf(path, "/sys/bus/pci/drivers/vmd/%s", ent->d_name); | |
b9135011 | 1004 | closedir(dir); |
7071320a | 1005 | return realpath(path, buf); |
60f0f54d PB |
1006 | } |
1007 | } | |
b9135011 JS |
1008 | |
1009 | closedir(dir); | |
60f0f54d PB |
1010 | return NULL; |
1011 | } | |
8662f92d MT |
1012 | |
1013 | /* Scan over all controller's namespaces and compare nsid value to verify if | |
1014 | * current one is supported. The routine doesn't check IMSM capabilities for | |
1015 | * namespace. Only one nvme namespace is supported by IMSM. | |
1016 | * Paramteres: | |
1017 | * fd - open descriptor to the nvme namespace | |
1018 | * verbose - error logging level | |
a8f3cfd5 | 1019 | * Returns: |
8662f92d MT |
1020 | * 1 - if namespace is supported |
1021 | * 0 - otherwise | |
a8f3cfd5 | 1022 | */ |
8662f92d | 1023 | int imsm_is_nvme_namespace_supported(int fd, int verbose) |
a8f3cfd5 | 1024 | { |
8662f92d MT |
1025 | DIR *dir = NULL; |
1026 | struct dirent *ent; | |
1027 | char cntrl_path[PATH_MAX]; | |
1028 | char ns_path[PATH_MAX]; | |
1029 | unsigned long long lowest_nsid = ULLONG_MAX; | |
1030 | unsigned long long this_nsid; | |
1031 | int rv = 0; | |
a8f3cfd5 | 1032 | |
a8f3cfd5 | 1033 | |
8662f92d MT |
1034 | if (!diskfd_to_devpath(fd, 1, cntrl_path) || |
1035 | !diskfd_to_devpath(fd, 0, ns_path)) { | |
1036 | if (verbose) | |
1037 | pr_err("Cannot get device paths\n"); | |
1038 | goto abort; | |
1039 | } | |
a8f3cfd5 | 1040 | |
a8f3cfd5 | 1041 | |
8662f92d | 1042 | if (devpath_to_ll(ns_path, "nsid", &this_nsid)) { |
a8f3cfd5 | 1043 | if (verbose) |
8662f92d MT |
1044 | pr_err("Cannot read nsid value for %s", |
1045 | basename(ns_path)); | |
1046 | goto abort; | |
a8f3cfd5 | 1047 | } |
8662f92d MT |
1048 | |
1049 | dir = opendir(cntrl_path); | |
1050 | if (!dir) | |
1051 | goto abort; | |
1052 | ||
1053 | /* The lowest nvme namespace is supported */ | |
1054 | for (ent = readdir(dir); ent; ent = readdir(dir)) { | |
1055 | unsigned long long curr_nsid; | |
1056 | char curr_ns_path[PATH_MAX + 256]; | |
1057 | ||
1058 | if (!strstr(ent->d_name, "nvme")) | |
1059 | continue; | |
1060 | ||
1061 | snprintf(curr_ns_path, sizeof(curr_ns_path), "%s/%s", | |
1062 | cntrl_path, ent->d_name); | |
1063 | ||
1064 | if (devpath_to_ll(curr_ns_path, "nsid", &curr_nsid)) | |
1065 | goto abort; | |
1066 | ||
1067 | if (lowest_nsid > curr_nsid) | |
1068 | lowest_nsid = curr_nsid; | |
1069 | } | |
1070 | ||
1071 | if (this_nsid == lowest_nsid) | |
1072 | rv = 1; | |
1073 | else if (verbose) | |
1074 | pr_err("IMSM is supported on the lowest NVMe namespace\n"); | |
1075 | ||
1076 | abort: | |
1077 | if (dir) | |
1078 | closedir(dir); | |
1079 | ||
1080 | return rv; | |
a8f3cfd5 | 1081 | } |
d835518b BK |
1082 | |
1083 | /* Verify if multipath is supported by NVMe controller | |
1084 | * Returns: | |
1085 | * 0 - not supported | |
1086 | * 1 - supported | |
1087 | */ | |
1088 | int is_multipath_nvme(int disk_fd) | |
1089 | { | |
d835518b | 1090 | char ns_path[PATH_MAX]; |
d835518b | 1091 | |
7c798f87 | 1092 | if (!diskfd_to_devpath(disk_fd, 0, ns_path)) |
d835518b BK |
1093 | return 0; |
1094 | ||
1095 | if (strncmp(ns_path, NVME_SUBSYS_PATH, strlen(NVME_SUBSYS_PATH)) == 0) | |
1096 | return 1; | |
1097 | ||
1098 | return 0; | |
1099 | } |