2 * Intel(R) Matrix Storage Manager hardware and firmware support routines
4 * Copyright (C) 2008 Intel Corporation
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.
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
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.
20 #include "platform-intel.h"
21 #include "probe_roms.h"
29 #include <sys/types.h>
34 static int devpath_to_ll(const char *dev_path
, const char *entry
,
35 unsigned long long *val
);
37 static __u16
devpath_to_vendor(const char *dev_path
);
39 void free_sys_dev(struct sys_dev
**list
)
42 struct sys_dev
*next
= (*list
)->next
;
51 struct sys_dev
*find_driver_devices(const char *bus
, const char *driver
)
53 /* search sysfs for devices driven by 'driver' */
59 struct sys_dev
*head
= NULL
;
60 struct sys_dev
*list
= NULL
;
61 enum sys_dev_type type
;
62 unsigned long long dev_id
;
64 if (strcmp(driver
, "isci") == 0)
66 else if (strcmp(driver
, "ahci") == 0)
69 type
= SYS_DEV_UNKNOWN
;
71 sprintf(path
, "/sys/bus/%s/drivers/%s", bus
, driver
);
72 driver_dir
= opendir(path
);
75 for (de
= readdir(driver_dir
); de
; de
= readdir(driver_dir
)) {
78 /* is 'de' a device? check that the 'subsystem' link exists and
79 * that its target matches 'bus'
81 sprintf(path
, "/sys/bus/%s/drivers/%s/%s/subsystem",
82 bus
, driver
, de
->d_name
);
83 n
= readlink(path
, link
, sizeof(link
));
84 if (n
< 0 || n
>= (int)sizeof(link
))
87 c
= strrchr(link
, '/');
90 if (strncmp(bus
, c
+1, strlen(bus
)) != 0)
93 sprintf(path
, "/sys/bus/%s/drivers/%s/%s",
94 bus
, driver
, de
->d_name
);
96 /* if it's not Intel device skip it. */
97 if (devpath_to_vendor(path
) != 0x8086)
100 if (devpath_to_ll(path
, "device", &dev_id
) != 0)
103 /* start / add list entry */
105 head
= malloc(sizeof(*head
));
108 list
->next
= malloc(sizeof(*head
));
117 list
->dev_id
= (__u16
) dev_id
;
119 list
->path
= canonicalize_file_name(path
);
121 if ((list
->pci_id
= strrchr(list
->path
, '/')) != NULL
)
124 closedir(driver_dir
);
129 static struct sys_dev
*intel_devices
=NULL
;
131 static enum sys_dev_type
device_type_by_id(__u16 device_id
)
133 struct sys_dev
*iter
;
135 for(iter
= intel_devices
; iter
!= NULL
; iter
= iter
->next
)
136 if (iter
->dev_id
== device_id
)
138 return SYS_DEV_UNKNOWN
;
141 static int devpath_to_ll(const char *dev_path
, const char *entry
, unsigned long long *val
)
143 char path
[strlen(dev_path
) + strlen(entry
) + 2];
147 sprintf(path
, "%s/%s", dev_path
, entry
);
149 fd
= open(path
, O_RDONLY
);
152 n
= sysfs_fd_get_ll(fd
, val
);
158 static __u16
devpath_to_vendor(const char *dev_path
)
160 char path
[strlen(dev_path
) + strlen("/vendor") + 1];
166 sprintf(path
, "%s/vendor", dev_path
);
168 fd
= open(path
, O_RDONLY
);
172 n
= read(fd
, vendor
, sizeof(vendor
));
173 if (n
== sizeof(vendor
)) {
174 vendor
[n
- 1] = '\0';
175 id
= strtoul(vendor
, NULL
, 16);
182 struct sys_dev
*find_intel_devices(void)
184 struct sys_dev
*ahci
, *isci
;
186 isci
= find_driver_devices("pci", "isci");
187 ahci
= find_driver_devices("pci", "ahci");
192 struct sys_dev
*elem
= ahci
;
201 * PCI Expansion ROM Data Structure Format */
202 struct pciExpDataStructFormat
{
206 } __attribute__ ((packed
));
208 static struct imsm_orom imsm_orom
[SYS_DEV_MAX
];
209 static int populated_orom
[SYS_DEV_MAX
];
211 static int scan(const void *start
, const void *end
, const void *data
)
214 const struct imsm_orom
*imsm_mem
;
216 int len
= (end
- start
);
217 struct pciExpDataStructFormat
*ptr
= (struct pciExpDataStructFormat
*)data
;
219 if (data
+ 0x18 > end
) {
220 dprintf("cannot find pciExpDataStruct \n");
224 dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
225 (ulong
) __le16_to_cpu(ptr
->vendorID
),
226 (ulong
) __le16_to_cpu(ptr
->deviceID
));
228 if (__le16_to_cpu(ptr
->vendorID
) == 0x8086) {
229 /* serach attached intel devices by device id from OROM */
230 dev
= device_type_by_id(__le16_to_cpu(ptr
->deviceID
));
231 if (dev
== SYS_DEV_UNKNOWN
)
237 for (offset
= 0; offset
< len
; offset
+= 4) {
238 imsm_mem
= start
+ offset
;
239 if ((memcmp(imsm_mem
->signature
, "$VER", 4) == 0) ||
240 (memcmp(imsm_mem
->signature
, "$OEM", 4) == 0)) {
241 imsm_orom
[dev
] = *imsm_mem
;
242 populated_orom
[dev
] = 1;
243 return populated_orom
[SYS_DEV_SATA
] && populated_orom
[SYS_DEV_SAS
];
250 const struct imsm_orom
*imsm_platform_test(enum sys_dev_type hba_id
, int *populated
,
251 struct imsm_orom
*imsm_orom
)
253 memset(imsm_orom
, 0, sizeof(*imsm_orom
));
254 imsm_orom
->rlc
= IMSM_OROM_RLC_RAID0
| IMSM_OROM_RLC_RAID1
|
255 IMSM_OROM_RLC_RAID10
| IMSM_OROM_RLC_RAID5
;
256 imsm_orom
->sss
= IMSM_OROM_SSS_4kB
| IMSM_OROM_SSS_8kB
|
257 IMSM_OROM_SSS_16kB
| IMSM_OROM_SSS_32kB
|
258 IMSM_OROM_SSS_64kB
| IMSM_OROM_SSS_128kB
|
259 IMSM_OROM_SSS_256kB
| IMSM_OROM_SSS_512kB
|
260 IMSM_OROM_SSS_1MB
| IMSM_OROM_SSS_2MB
;
261 imsm_orom
->dpa
= IMSM_OROM_DISKS_PER_ARRAY
;
262 imsm_orom
->tds
= IMSM_OROM_TOTAL_DISKS
;
263 imsm_orom
->vpa
= IMSM_OROM_VOLUMES_PER_ARRAY
;
264 imsm_orom
->vphba
= IMSM_OROM_VOLUMES_PER_HBA
;
265 imsm_orom
->attr
= imsm_orom
->rlc
| IMSM_OROM_ATTR_ChecksumVerify
;
268 if (check_env("IMSM_TEST_OROM_NORAID5")) {
269 imsm_orom
->rlc
= IMSM_OROM_RLC_RAID0
| IMSM_OROM_RLC_RAID1
|
270 IMSM_OROM_RLC_RAID10
;
272 if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba_id
== SYS_DEV_SAS
)) {
273 imsm_orom
->rlc
= IMSM_OROM_RLC_RAID0
| IMSM_OROM_RLC_RAID1
|
274 IMSM_OROM_RLC_RAID10
;
276 if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba_id
== SYS_DEV_SATA
)) {
277 imsm_orom
->rlc
= IMSM_OROM_RLC_RAID0
| IMSM_OROM_RLC_RAID1
|
278 IMSM_OROM_RLC_RAID10
;
286 static const struct imsm_orom
*find_imsm_hba_orom(enum sys_dev_type hba_id
)
290 if (hba_id
>= SYS_DEV_MAX
)
293 /* it's static data so we only need to read it once */
294 if (populated_orom
[hba_id
]) {
295 dprintf("OROM CAP: %p, pid: %d pop: %d\n",
296 &imsm_orom
[hba_id
], (int) getpid(), populated_orom
[hba_id
]);
297 return &imsm_orom
[hba_id
];
299 if (check_env("IMSM_TEST_OROM")) {
300 dprintf("OROM CAP: %p, pid: %d pop: %d\n",
301 &imsm_orom
[hba_id
], (int) getpid(), populated_orom
[hba_id
]);
302 return imsm_platform_test(hba_id
, &populated_orom
[hba_id
], &imsm_orom
[hba_id
]);
304 /* return empty OROM capabilities in EFI test mode */
305 if (check_env("IMSM_TEST_AHCI_EFI") ||
306 check_env("IMSM_TEST_SCU_EFI"))
310 if (intel_devices
!= NULL
)
311 free_sys_dev(&intel_devices
);
313 intel_devices
= find_intel_devices();
315 if (intel_devices
== NULL
)
318 /* scan option-rom memory looking for an imsm signature */
319 if (check_env("IMSM_SAFE_OROM_SCAN"))
323 if (probe_roms_init(align
) != 0)
326 /* ignore return value - True is returned if both adapater roms are found */
327 scan_adapter_roms(scan
);
330 if (intel_devices
!= NULL
)
331 free_sys_dev(&intel_devices
);
332 intel_devices
= NULL
;
334 if (populated_orom
[hba_id
])
335 return &imsm_orom
[hba_id
];
339 #define GUID_STR_MAX 37 /* according to GUID format:
340 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */
342 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
344 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
345 (b) & 0xff, ((b) >> 8) & 0xff, \
346 (c) & 0xff, ((c) >> 8) & 0xff, \
347 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
350 #define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
351 #define SCU_PROP "RstScuV"
352 #define SCU_PROP_OEM "RstScuO"
353 #define AHCI_PROP "RstSataV"
355 #define VENDOR_GUID \
356 EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
358 int populated_efi
[SYS_DEV_MAX
] = { 0, 0 };
360 static struct imsm_orom imsm_efi
[SYS_DEV_MAX
];
362 const struct imsm_orom
*find_imsm_efi(enum sys_dev_type hba_id
)
366 char buf
[GUID_STR_MAX
];
369 if (hba_id
>= SYS_DEV_MAX
)
372 dprintf("EFI CAP: %p, pid: %d pop: %d\n",
373 &imsm_efi
[hba_id
], (int) getpid(), populated_efi
[hba_id
]);
375 /* it's static data so we only need to read it once */
376 if (populated_efi
[hba_id
]) {
377 dprintf("EFI CAP: %p, pid: %d pop: %d\n",
378 &imsm_efi
[hba_id
], (int) getpid(), populated_efi
[hba_id
]);
379 return &imsm_efi
[hba_id
];
381 if (check_env("IMSM_TEST_AHCI_EFI") ||
382 check_env("IMSM_TEST_SCU_EFI")) {
383 dprintf("OROM CAP: %p, pid: %d pop: %d\n",
384 &imsm_efi
[hba_id
], (int) getpid(), populated_efi
[hba_id
]);
385 return imsm_platform_test(hba_id
, &populated_efi
[hba_id
], &imsm_efi
[hba_id
]);
387 /* OROM test is set, return that there is no EFI capabilities */
388 if (check_env("IMSM_TEST_OROM")) {
391 if (hba_id
== SYS_DEV_SAS
)
392 snprintf(path
, PATH_MAX
, "%s/%s-%s", SYS_EFI_VAR_PATH
, SCU_PROP
, guid_str(buf
, VENDOR_GUID
));
394 snprintf(path
, PATH_MAX
, "%s/%s-%s", SYS_EFI_VAR_PATH
, AHCI_PROP
, guid_str(buf
, VENDOR_GUID
));
396 dprintf("EFI VAR: path=%s\n", path
);
397 dfd
= open(path
, O_RDONLY
);
398 if ((dfd
< 0) && (hba_id
== SYS_DEV_SAS
)) {
399 /* check OEM parameters */
400 snprintf(path
, PATH_MAX
, "%s/%s-%s", SYS_EFI_VAR_PATH
, SCU_PROP_OEM
, guid_str(buf
, VENDOR_GUID
));
401 dfd
= open(path
, O_RDONLY
);
402 dprintf("EFI VAR: path=%s\n", path
);
405 populated_efi
[hba_id
] = 0;
408 n
= read(dfd
, &imsm_efi
[hba_id
], sizeof(imsm_efi
[0]));
410 if (n
< (int) (sizeof(imsm_efi
[0]))) {
413 populated_efi
[hba_id
] = 1;
414 return &imsm_efi
[hba_id
];
418 * backward interface compatibility
420 const struct imsm_orom
*find_imsm_orom(void)
422 return find_imsm_hba_orom(SYS_DEV_SATA
);
425 const struct imsm_orom
*find_imsm_capability(enum sys_dev_type hba_id
)
427 const struct imsm_orom
*cap
=NULL
;
430 if ((cap
= find_imsm_efi(hba_id
)) != NULL
)
432 if ((cap
= find_imsm_hba_orom(hba_id
)) != NULL
)
437 char *devt_to_devpath(dev_t dev
)
441 sprintf(device
, "/sys/dev/block/%d:%d/device", major(dev
), minor(dev
));
442 return canonicalize_file_name(device
);
445 char *diskfd_to_devpath(int fd
)
447 /* return the device path for a disk, return NULL on error or fd
448 * refers to a partition
452 if (fstat(fd
, &st
) != 0)
454 if (!S_ISBLK(st
.st_mode
))
457 return devt_to_devpath(st
.st_rdev
);
460 int path_attached_to_hba(const char *disk_path
, const char *hba_path
)
464 if (check_env("IMSM_TEST_AHCI_DEV") ||
465 check_env("IMSM_TEST_SCU_DEV")) {
469 if (!disk_path
|| !hba_path
)
471 dprintf("hba: %s - disk: %s\n", hba_path
, disk_path
);
472 if (strncmp(disk_path
, hba_path
, strlen(hba_path
)) == 0)
480 int devt_attached_to_hba(dev_t dev
, const char *hba_path
)
482 char *disk_path
= devt_to_devpath(dev
);
483 int rc
= path_attached_to_hba(disk_path
, hba_path
);
491 int disk_attached_to_hba(int fd
, const char *hba_path
)
493 char *disk_path
= diskfd_to_devpath(fd
);
494 int rc
= path_attached_to_hba(disk_path
, hba_path
);