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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 __u16 devpath_to_vendor(const char *dev_path); | |
37 | ||
38 | static void free_sys_dev(struct sys_dev **list) | |
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' */ | |
53 | char path[292]; | |
54 | char link[256]; | |
55 | char *c; | |
56 | DIR *driver_dir; | |
57 | struct dirent *de; | |
58 | struct sys_dev *head = NULL; | |
59 | struct sys_dev *list = NULL; | |
60 | enum sys_dev_type type; | |
61 | unsigned long long dev_id; | |
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 | |
68 | type = SYS_DEV_UNKNOWN; | |
69 | ||
70 | sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver); | |
71 | driver_dir = opendir(path); | |
72 | if (!driver_dir) | |
73 | return NULL; | |
74 | for (de = readdir(driver_dir); de; de = readdir(driver_dir)) { | |
75 | int n; | |
76 | ||
77 | /* is 'de' a device? check that the 'subsystem' link exists and | |
78 | * that its target matches 'bus' | |
79 | */ | |
80 | sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem", | |
81 | bus, driver, de->d_name); | |
82 | n = readlink(path, link, sizeof(link)); | |
83 | if (n < 0 || n >= (int)sizeof(link)) | |
84 | continue; | |
85 | link[n] = '\0'; | |
86 | c = strrchr(link, '/'); | |
87 | if (!c) | |
88 | continue; | |
89 | if (strncmp(bus, c+1, strlen(bus)) != 0) | |
90 | continue; | |
91 | ||
92 | sprintf(path, "/sys/bus/%s/drivers/%s/%s", | |
93 | bus, driver, de->d_name); | |
94 | ||
95 | /* if it's not Intel device skip it. */ | |
96 | if (devpath_to_vendor(path) != 0x8086) | |
97 | continue; | |
98 | ||
99 | if (devpath_to_ll(path, "device", &dev_id) != 0) | |
100 | continue; | |
101 | ||
102 | /* start / add list entry */ | |
103 | if (!head) { | |
104 | head = xmalloc(sizeof(*head)); | |
105 | list = head; | |
106 | } else { | |
107 | list->next = xmalloc(sizeof(*head)); | |
108 | list = list->next; | |
109 | } | |
110 | ||
111 | if (!list) { | |
112 | free_sys_dev(&head); | |
113 | break; | |
114 | } | |
115 | ||
116 | list->dev_id = (__u16) dev_id; | |
117 | list->type = type; | |
118 | list->path = realpath(path, NULL); | |
119 | list->next = NULL; | |
120 | if ((list->pci_id = strrchr(list->path, '/')) != NULL) | |
121 | list->pci_id++; | |
122 | } | |
123 | closedir(driver_dir); | |
124 | return head; | |
125 | } | |
126 | ||
127 | static struct sys_dev *intel_devices=NULL; | |
128 | static time_t valid_time = 0; | |
129 | ||
130 | static enum sys_dev_type device_type_by_id(__u16 device_id) | |
131 | { | |
132 | struct sys_dev *iter; | |
133 | ||
134 | for(iter = intel_devices; iter != NULL; iter = iter->next) | |
135 | if (iter->dev_id == device_id) | |
136 | return iter->type; | |
137 | return SYS_DEV_UNKNOWN; | |
138 | } | |
139 | ||
140 | static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val) | |
141 | { | |
142 | char path[strlen(dev_path) + strlen(entry) + 2]; | |
143 | int fd; | |
144 | int n; | |
145 | ||
146 | sprintf(path, "%s/%s", dev_path, entry); | |
147 | ||
148 | fd = open(path, O_RDONLY); | |
149 | if (fd < 0) | |
150 | return -1; | |
151 | n = sysfs_fd_get_ll(fd, val); | |
152 | close(fd); | |
153 | return n; | |
154 | } | |
155 | ||
156 | static __u16 devpath_to_vendor(const char *dev_path) | |
157 | { | |
158 | char path[strlen(dev_path) + strlen("/vendor") + 1]; | |
159 | char vendor[7]; | |
160 | int fd; | |
161 | __u16 id = 0xffff; | |
162 | int n; | |
163 | ||
164 | sprintf(path, "%s/vendor", dev_path); | |
165 | ||
166 | fd = open(path, O_RDONLY); | |
167 | if (fd < 0) | |
168 | return 0xffff; | |
169 | ||
170 | n = read(fd, vendor, sizeof(vendor)); | |
171 | if (n == sizeof(vendor)) { | |
172 | vendor[n - 1] = '\0'; | |
173 | id = strtoul(vendor, NULL, 16); | |
174 | } | |
175 | close(fd); | |
176 | ||
177 | return id; | |
178 | } | |
179 | ||
180 | struct sys_dev *find_intel_devices(void) | |
181 | { | |
182 | struct sys_dev *ahci, *isci; | |
183 | ||
184 | if (valid_time > time(0) - 10) | |
185 | return intel_devices; | |
186 | ||
187 | if (intel_devices) | |
188 | free_sys_dev(&intel_devices); | |
189 | ||
190 | isci = find_driver_devices("pci", "isci"); | |
191 | ahci = find_driver_devices("pci", "ahci"); | |
192 | ||
193 | if (!ahci) { | |
194 | ahci = isci; | |
195 | } else { | |
196 | struct sys_dev *elem = ahci; | |
197 | while (elem->next) | |
198 | elem = elem->next; | |
199 | elem->next = isci; | |
200 | } | |
201 | intel_devices = ahci; | |
202 | valid_time = time(0); | |
203 | return intel_devices; | |
204 | } | |
205 | ||
206 | /* | |
207 | * PCI Expansion ROM Data Structure Format */ | |
208 | struct pciExpDataStructFormat { | |
209 | __u8 ver[4]; | |
210 | __u16 vendorID; | |
211 | __u16 deviceID; | |
212 | } __attribute__ ((packed)); | |
213 | ||
214 | static struct imsm_orom imsm_orom[SYS_DEV_MAX]; | |
215 | static int populated_orom[SYS_DEV_MAX]; | |
216 | ||
217 | static int scan(const void *start, const void *end, const void *data) | |
218 | { | |
219 | int offset; | |
220 | const struct imsm_orom *imsm_mem; | |
221 | int dev; | |
222 | int len = (end - start); | |
223 | struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data; | |
224 | ||
225 | if (data + 0x18 > end) { | |
226 | dprintf("cannot find pciExpDataStruct \n"); | |
227 | return 0; | |
228 | } | |
229 | ||
230 | dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n", | |
231 | (ulong) __le16_to_cpu(ptr->vendorID), | |
232 | (ulong) __le16_to_cpu(ptr->deviceID)); | |
233 | ||
234 | if (__le16_to_cpu(ptr->vendorID) == 0x8086) { | |
235 | /* serach attached intel devices by device id from OROM */ | |
236 | dev = device_type_by_id(__le16_to_cpu(ptr->deviceID)); | |
237 | if (dev == SYS_DEV_UNKNOWN) | |
238 | return 0; | |
239 | } | |
240 | else | |
241 | return 0; | |
242 | ||
243 | for (offset = 0; offset < len; offset += 4) { | |
244 | imsm_mem = start + offset; | |
245 | if ((memcmp(imsm_mem->signature, "$VER", 4) == 0)) { | |
246 | imsm_orom[dev] = *imsm_mem; | |
247 | populated_orom[dev] = 1; | |
248 | return populated_orom[SYS_DEV_SATA] && populated_orom[SYS_DEV_SAS]; | |
249 | } | |
250 | } | |
251 | return 0; | |
252 | } | |
253 | ||
254 | const struct imsm_orom *imsm_platform_test(enum sys_dev_type hba_id, int *populated, | |
255 | struct imsm_orom *imsm_orom) | |
256 | { | |
257 | memset(imsm_orom, 0, sizeof(*imsm_orom)); | |
258 | imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
259 | IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5; | |
260 | imsm_orom->sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB | | |
261 | IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB | | |
262 | IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB | | |
263 | IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB | | |
264 | IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB; | |
265 | imsm_orom->dpa = IMSM_OROM_DISKS_PER_ARRAY; | |
266 | imsm_orom->tds = IMSM_OROM_TOTAL_DISKS; | |
267 | imsm_orom->vpa = IMSM_OROM_VOLUMES_PER_ARRAY; | |
268 | imsm_orom->vphba = IMSM_OROM_VOLUMES_PER_HBA; | |
269 | imsm_orom->attr = imsm_orom->rlc | IMSM_OROM_ATTR_ChecksumVerify; | |
270 | *populated = 1; | |
271 | ||
272 | if (check_env("IMSM_TEST_OROM_NORAID5")) { | |
273 | imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
274 | IMSM_OROM_RLC_RAID10; | |
275 | } | |
276 | if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba_id == SYS_DEV_SAS)) { | |
277 | imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
278 | IMSM_OROM_RLC_RAID10; | |
279 | } | |
280 | if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba_id == SYS_DEV_SATA)) { | |
281 | imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 | | |
282 | IMSM_OROM_RLC_RAID10; | |
283 | } | |
284 | ||
285 | return imsm_orom; | |
286 | } | |
287 | ||
288 | static const struct imsm_orom *find_imsm_hba_orom(enum sys_dev_type hba_id) | |
289 | { | |
290 | unsigned long align; | |
291 | ||
292 | if (hba_id >= SYS_DEV_MAX) | |
293 | return NULL; | |
294 | ||
295 | /* it's static data so we only need to read it once */ | |
296 | if (populated_orom[hba_id]) { | |
297 | dprintf("OROM CAP: %p, pid: %d pop: %d\n", | |
298 | &imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]); | |
299 | return &imsm_orom[hba_id]; | |
300 | } | |
301 | if (check_env("IMSM_TEST_OROM")) { | |
302 | dprintf("OROM CAP: %p, pid: %d pop: %d\n", | |
303 | &imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]); | |
304 | return imsm_platform_test(hba_id, &populated_orom[hba_id], &imsm_orom[hba_id]); | |
305 | } | |
306 | /* return empty OROM capabilities in EFI test mode */ | |
307 | if (check_env("IMSM_TEST_AHCI_EFI") || | |
308 | check_env("IMSM_TEST_SCU_EFI")) | |
309 | return NULL; | |
310 | ||
311 | find_intel_devices(); | |
312 | ||
313 | if (intel_devices == NULL) | |
314 | return NULL; | |
315 | ||
316 | /* scan option-rom memory looking for an imsm signature */ | |
317 | if (check_env("IMSM_SAFE_OROM_SCAN")) | |
318 | align = 2048; | |
319 | else | |
320 | align = 512; | |
321 | if (probe_roms_init(align) != 0) | |
322 | return NULL; | |
323 | probe_roms(); | |
324 | /* ignore return value - True is returned if both adapater roms are found */ | |
325 | scan_adapter_roms(scan); | |
326 | probe_roms_exit(); | |
327 | ||
328 | if (populated_orom[hba_id]) | |
329 | return &imsm_orom[hba_id]; | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | #define GUID_STR_MAX 37 /* according to GUID format: | |
334 | * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */ | |
335 | ||
336 | #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ | |
337 | ((struct efi_guid) \ | |
338 | {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ | |
339 | (b) & 0xff, ((b) >> 8) & 0xff, \ | |
340 | (c) & 0xff, ((c) >> 8) & 0xff, \ | |
341 | (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) | |
342 | ||
343 | #define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars" | |
344 | #define SCU_PROP "RstScuV" | |
345 | #define AHCI_PROP "RstSataV" | |
346 | ||
347 | #define VENDOR_GUID \ | |
348 | EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6) | |
349 | ||
350 | int populated_efi[SYS_DEV_MAX] = { 0, 0 }; | |
351 | ||
352 | static struct imsm_orom imsm_efi[SYS_DEV_MAX]; | |
353 | ||
354 | int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid) | |
355 | { | |
356 | char path[PATH_MAX]; | |
357 | char buf[GUID_STR_MAX]; | |
358 | int dfd; | |
359 | ssize_t n, var_data_len; | |
360 | ||
361 | snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid)); | |
362 | ||
363 | dprintf("EFI VAR: path=%s\n", path); | |
364 | /* get size of variable data */ | |
365 | dfd = open(path, O_RDONLY); | |
366 | if (dfd < 0) | |
367 | return 1; | |
368 | ||
369 | n = read(dfd, &buf, sizeof(buf)); | |
370 | close(dfd); | |
371 | if (n < 0) | |
372 | return 1; | |
373 | buf[n] = '\0'; | |
374 | ||
375 | errno = 0; | |
376 | var_data_len = strtoul(buf, NULL, 16); | |
377 | if ((errno == ERANGE && (var_data_len == LONG_MAX)) | |
378 | || (errno != 0 && var_data_len == 0)) | |
379 | return 1; | |
380 | ||
381 | /* get data */ | |
382 | snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid)); | |
383 | ||
384 | dprintf("EFI VAR: path=%s\n", path); | |
385 | dfd = open(path, O_RDONLY); | |
386 | if (dfd < 0) | |
387 | return 1; | |
388 | ||
389 | n = read(dfd, buffer, buf_size); | |
390 | close(dfd); | |
391 | if (n != var_data_len || n < buf_size) { | |
392 | return 1; | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id) | |
399 | { | |
400 | if (hba_id >= SYS_DEV_MAX) | |
401 | return NULL; | |
402 | ||
403 | dprintf("EFI CAP: %p, pid: %d pop: %d\n", | |
404 | &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]); | |
405 | ||
406 | /* it's static data so we only need to read it once */ | |
407 | if (populated_efi[hba_id]) { | |
408 | dprintf("EFI CAP: %p, pid: %d pop: %d\n", | |
409 | &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]); | |
410 | return &imsm_efi[hba_id]; | |
411 | } | |
412 | if (check_env("IMSM_TEST_AHCI_EFI") || | |
413 | check_env("IMSM_TEST_SCU_EFI")) { | |
414 | dprintf("OROM CAP: %p, pid: %d pop: %d\n", | |
415 | &imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]); | |
416 | return imsm_platform_test(hba_id, &populated_efi[hba_id], &imsm_efi[hba_id]); | |
417 | } | |
418 | /* OROM test is set, return that there is no EFI capabilities */ | |
419 | if (check_env("IMSM_TEST_OROM")) | |
420 | return NULL; | |
421 | ||
422 | if (read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID)) { | |
423 | populated_efi[hba_id] = 0; | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | populated_efi[hba_id] = 1; | |
428 | return &imsm_efi[hba_id]; | |
429 | } | |
430 | ||
431 | /* | |
432 | * backward interface compatibility | |
433 | */ | |
434 | const struct imsm_orom *find_imsm_orom(void) | |
435 | { | |
436 | return find_imsm_hba_orom(SYS_DEV_SATA); | |
437 | } | |
438 | ||
439 | const struct imsm_orom *find_imsm_capability(enum sys_dev_type hba_id) | |
440 | { | |
441 | const struct imsm_orom *cap=NULL; | |
442 | ||
443 | if ((cap = find_imsm_efi(hba_id)) != NULL) | |
444 | return cap; | |
445 | if ((cap = find_imsm_hba_orom(hba_id)) != NULL) | |
446 | return cap; | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | char *devt_to_devpath(dev_t dev) | |
451 | { | |
452 | char device[46]; | |
453 | ||
454 | sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev)); | |
455 | return realpath(device, NULL); | |
456 | } | |
457 | ||
458 | char *diskfd_to_devpath(int fd) | |
459 | { | |
460 | /* return the device path for a disk, return NULL on error or fd | |
461 | * refers to a partition | |
462 | */ | |
463 | struct stat st; | |
464 | ||
465 | if (fstat(fd, &st) != 0) | |
466 | return NULL; | |
467 | if (!S_ISBLK(st.st_mode)) | |
468 | return NULL; | |
469 | ||
470 | return devt_to_devpath(st.st_rdev); | |
471 | } | |
472 | ||
473 | int path_attached_to_hba(const char *disk_path, const char *hba_path) | |
474 | { | |
475 | int rc; | |
476 | ||
477 | if (check_env("IMSM_TEST_AHCI_DEV") || | |
478 | check_env("IMSM_TEST_SCU_DEV")) { | |
479 | return 1; | |
480 | } | |
481 | ||
482 | if (!disk_path || !hba_path) | |
483 | return 0; | |
484 | dprintf("hba: %s - disk: %s\n", hba_path, disk_path); | |
485 | if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0) | |
486 | rc = 1; | |
487 | else | |
488 | rc = 0; | |
489 | ||
490 | return rc; | |
491 | } | |
492 | ||
493 | int devt_attached_to_hba(dev_t dev, const char *hba_path) | |
494 | { | |
495 | char *disk_path = devt_to_devpath(dev); | |
496 | int rc = path_attached_to_hba(disk_path, hba_path); | |
497 | ||
498 | if (disk_path) | |
499 | free(disk_path); | |
500 | ||
501 | return rc; | |
502 | } | |
503 | ||
504 | int disk_attached_to_hba(int fd, const char *hba_path) | |
505 | { | |
506 | char *disk_path = diskfd_to_devpath(fd); | |
507 | int rc = path_attached_to_hba(disk_path, hba_path); | |
508 | ||
509 | if (disk_path) | |
510 | free(disk_path); | |
511 | ||
512 | return rc; | |
513 | } |