[thirdparty/mdadm.git] / platform-intel.c

/*
 * Intel(R) Matrix Storage Manager hardware and firmware support routines
 *
 * Copyright (C) 2008 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */
#include "mdadm.h"
#include "platform-intel.h"
#include "probe_roms.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>

static int devpath_to_ll(const char *dev_path, const char *entry,
			 unsigned long long *val);

static __u16 devpath_to_vendor(const char *dev_path);

static void free_sys_dev(struct sys_dev **list)
{
	while (*list) {
		struct sys_dev *next = (*list)->next;

		if ((*list)->path)
			free((*list)->path);
		free(*list);
		*list = next;
	}
}

struct sys_dev *find_driver_devices(const char *bus, const char *driver)
{
	/* search sysfs for devices driven by 'driver' */
	char path[292];
	char link[256];
	char *c;
	DIR *driver_dir;
	struct dirent *de;
	struct sys_dev *head = NULL;
	struct sys_dev *list = NULL;
	enum sys_dev_type type;
	unsigned long long dev_id;

	if (strcmp(driver, "isci") == 0)
		type = SYS_DEV_SAS;
	else if (strcmp(driver, "ahci") == 0)
		type = SYS_DEV_SATA;
	else
		type = SYS_DEV_UNKNOWN;

	sprintf(path, "/sys/bus/%s/drivers/%s", bus, driver);
	driver_dir = opendir(path);
	if (!driver_dir)
		return NULL;
	for (de = readdir(driver_dir); de; de = readdir(driver_dir)) {
		int n;

		/* is 'de' a device? check that the 'subsystem' link exists and
		 * that its target matches 'bus'
		 */
		sprintf(path, "/sys/bus/%s/drivers/%s/%s/subsystem",
			bus, driver, de->d_name);
		n = readlink(path, link, sizeof(link));
		if (n < 0 || n >= (int)sizeof(link))
			continue;
		link[n] = '\0';
		c = strrchr(link, '/');
		if (!c)
			continue;
		if (strncmp(bus, c+1, strlen(bus)) != 0)
			continue;

		sprintf(path, "/sys/bus/%s/drivers/%s/%s",
			bus, driver, de->d_name);

		/* if it's not Intel device skip it. */
		if (devpath_to_vendor(path) != 0x8086)
			continue;

		if (devpath_to_ll(path, "device", &dev_id) != 0)
			continue;

		/* start / add list entry */
		if (!head) {
			head = xmalloc(sizeof(*head));
			list = head;
		} else {
			list->next = xmalloc(sizeof(*head));
			list = list->next;
		}

		if (!list) {
			free_sys_dev(&head);
			break;
		}

		list->dev_id = (__u16) dev_id;
		list->type = type;
		list->path = realpath(path, NULL);
		list->next = NULL;
		if ((list->pci_id = strrchr(list->path, '/')) != NULL)
			list->pci_id++;
	}
	closedir(driver_dir);
	return head;
}

static struct sys_dev *intel_devices=NULL;
static time_t valid_time = 0;

static enum sys_dev_type device_type_by_id(__u16 device_id)
{
	struct sys_dev *iter;

	for(iter = intel_devices; iter != NULL; iter = iter->next)
		if (iter->dev_id == device_id)
			return iter->type;
	return SYS_DEV_UNKNOWN;
}

static int devpath_to_ll(const char *dev_path, const char *entry, unsigned long long *val)
{
	char path[strlen(dev_path) + strlen(entry) + 2];
	int fd;
	int n;

	sprintf(path, "%s/%s", dev_path, entry);

	fd = open(path, O_RDONLY);
	if (fd < 0)
		return -1;
	n = sysfs_fd_get_ll(fd, val);
	close(fd);
	return n;
}

static __u16 devpath_to_vendor(const char *dev_path)
{
	char path[strlen(dev_path) + strlen("/vendor") + 1];
	char vendor[7];
	int fd;
	__u16 id = 0xffff;
	int n;

	sprintf(path, "%s/vendor", dev_path);

	fd = open(path, O_RDONLY);
	if (fd < 0)
		return 0xffff;

	n = read(fd, vendor, sizeof(vendor));
	if (n == sizeof(vendor)) {
		vendor[n - 1] = '\0';
		id = strtoul(vendor, NULL, 16);
	}
	close(fd);

	return id;
}

struct sys_dev *find_intel_devices(void)
{
	struct sys_dev *ahci, *isci;

	if (valid_time > time(0) - 10)
		return intel_devices;

	if (intel_devices)
		free_sys_dev(&intel_devices);

	isci = find_driver_devices("pci", "isci");
	ahci = find_driver_devices("pci", "ahci");

	if (!ahci) {
		ahci = isci;
	} else {
		struct sys_dev *elem = ahci;
		while (elem->next)
			elem = elem->next;
		elem->next = isci;
	}
	intel_devices = ahci;
	valid_time = time(0);
	return intel_devices;
}

/*
 * PCI Expansion ROM Data Structure Format */
struct pciExpDataStructFormat {
	__u8  ver[4];
	__u16 vendorID;
	__u16 deviceID;
} __attribute__ ((packed));

static struct imsm_orom imsm_orom[SYS_DEV_MAX];
static int populated_orom[SYS_DEV_MAX];

static int scan(const void *start, const void *end, const void *data)
{
	int offset;
	const struct imsm_orom *imsm_mem;
	int dev;
	int len = (end - start);
	struct pciExpDataStructFormat *ptr= (struct pciExpDataStructFormat *)data;

	if (data + 0x18 > end) {
		dprintf("cannot find pciExpDataStruct \n");
		return 0;
	}

	dprintf("ptr->vendorID: %lx __le16_to_cpu(ptr->deviceID): %lx \n",
		(ulong) __le16_to_cpu(ptr->vendorID),
		(ulong) __le16_to_cpu(ptr->deviceID));

	if (__le16_to_cpu(ptr->vendorID) == 0x8086) {
		/* serach  attached intel devices by device id from OROM */
		dev = device_type_by_id(__le16_to_cpu(ptr->deviceID));
		if (dev == SYS_DEV_UNKNOWN)
			return 0;
	}
	else
		return 0;

	for (offset = 0; offset < len; offset += 4) {
		imsm_mem = start + offset;
		if ((memcmp(imsm_mem->signature, "$VER", 4) == 0)) {
			imsm_orom[dev] = *imsm_mem;
			populated_orom[dev] = 1;
			return populated_orom[SYS_DEV_SATA] && populated_orom[SYS_DEV_SAS];
		}
	}
	return 0;
}

const struct imsm_orom *imsm_platform_test(enum sys_dev_type hba_id, int *populated,
					   struct imsm_orom *imsm_orom)
{
	memset(imsm_orom, 0, sizeof(*imsm_orom));
	imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
				IMSM_OROM_RLC_RAID10 | IMSM_OROM_RLC_RAID5;
	imsm_orom->sss = IMSM_OROM_SSS_4kB | IMSM_OROM_SSS_8kB |
				IMSM_OROM_SSS_16kB | IMSM_OROM_SSS_32kB |
				IMSM_OROM_SSS_64kB | IMSM_OROM_SSS_128kB |
				IMSM_OROM_SSS_256kB | IMSM_OROM_SSS_512kB |
				IMSM_OROM_SSS_1MB | IMSM_OROM_SSS_2MB;
	imsm_orom->dpa = IMSM_OROM_DISKS_PER_ARRAY;
	imsm_orom->tds = IMSM_OROM_TOTAL_DISKS;
	imsm_orom->vpa = IMSM_OROM_VOLUMES_PER_ARRAY;
	imsm_orom->vphba = IMSM_OROM_VOLUMES_PER_HBA;
	imsm_orom->attr = imsm_orom->rlc | IMSM_OROM_ATTR_ChecksumVerify;
	*populated = 1;

	if (check_env("IMSM_TEST_OROM_NORAID5")) {
		imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
				IMSM_OROM_RLC_RAID10;
	}
	if (check_env("IMSM_TEST_AHCI_EFI_NORAID5") && (hba_id == SYS_DEV_SAS)) {
		imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
				IMSM_OROM_RLC_RAID10;
	}
	if (check_env("IMSM_TEST_SCU_EFI_NORAID5") && (hba_id == SYS_DEV_SATA)) {
		imsm_orom->rlc = IMSM_OROM_RLC_RAID0 | IMSM_OROM_RLC_RAID1 |
				IMSM_OROM_RLC_RAID10;
	}

	return imsm_orom;
}

static const struct imsm_orom *find_imsm_hba_orom(enum sys_dev_type hba_id)
{
	unsigned long align;

	if (hba_id >= SYS_DEV_MAX)
		return NULL;

	/* it's static data so we only need to read it once */
	if (populated_orom[hba_id]) {
		dprintf("OROM CAP: %p, pid: %d pop: %d\n",
			&imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
		return &imsm_orom[hba_id];
	}
	if (check_env("IMSM_TEST_OROM")) {
		dprintf("OROM CAP: %p,  pid: %d pop: %d\n",
			&imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
		return imsm_platform_test(hba_id, &populated_orom[hba_id], &imsm_orom[hba_id]);
	}
	/* return empty OROM capabilities in EFI test mode */
	if (check_env("IMSM_TEST_AHCI_EFI") ||
	    check_env("IMSM_TEST_SCU_EFI"))
		return NULL;

	find_intel_devices();

	if (intel_devices == NULL)
		return NULL;

	/* scan option-rom memory looking for an imsm signature */
	if (check_env("IMSM_SAFE_OROM_SCAN"))
		align = 2048;
	else
		align = 512;
	if (probe_roms_init(align) != 0)
		return NULL;
	probe_roms();
	/* ignore return value - True is returned if both adapater roms are found */
	scan_adapter_roms(scan);
	probe_roms_exit();

	if (populated_orom[hba_id])
		return &imsm_orom[hba_id];
	return NULL;
}

#define GUID_STR_MAX	37  /* according to GUID format:
			     * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" */

#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
((struct efi_guid) \
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  (b) & 0xff, ((b) >> 8) & 0xff, \
  (c) & 0xff, ((c) >> 8) & 0xff, \
  (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})

#define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
#define SCU_PROP "RstScuV"
#define AHCI_PROP "RstSataV"

#define VENDOR_GUID \
	EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)

int populated_efi[SYS_DEV_MAX] = { 0, 0 };

static struct imsm_orom imsm_efi[SYS_DEV_MAX];

int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struct efi_guid guid)
{
	char path[PATH_MAX];
	char buf[GUID_STR_MAX];
	int dfd;
	ssize_t n, var_data_len;

	snprintf(path, PATH_MAX, "%s/%s-%s/size", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));

	dprintf("EFI VAR: path=%s\n", path);
	/* get size of variable data */
	dfd = open(path, O_RDONLY);
	if (dfd < 0)
		return 1;

	n = read(dfd, &buf, sizeof(buf));
	close(dfd);
	if (n < 0)
		return 1;
	buf[n] = '\0';

	errno = 0;
	var_data_len = strtoul(buf, NULL, 16);
	if ((errno == ERANGE && (var_data_len == LONG_MAX))
	    || (errno != 0 && var_data_len == 0))
		return 1;

	/* get data */
	snprintf(path, PATH_MAX, "%s/%s-%s/data", SYS_EFI_VAR_PATH, variable_name, guid_str(buf, guid));

	dprintf("EFI VAR: path=%s\n", path);
	dfd = open(path, O_RDONLY);
	if (dfd < 0)
		return 1;

	n = read(dfd, buffer, buf_size);
	close(dfd);
	if (n != var_data_len || n < buf_size) {
		return 1;
	}

	return 0;
}

const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id)
{
	if (hba_id >= SYS_DEV_MAX)
		return NULL;

	dprintf("EFI CAP: %p,  pid: %d pop: %d\n",
		&imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);

	/* it's static data so we only need to read it once */
	if (populated_efi[hba_id]) {
		dprintf("EFI CAP: %p, pid: %d pop: %d\n",
			&imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);
		return &imsm_efi[hba_id];
	}
	if (check_env("IMSM_TEST_AHCI_EFI") ||
	    check_env("IMSM_TEST_SCU_EFI")) {
		dprintf("OROM CAP: %p,  pid: %d pop: %d\n",
			&imsm_efi[hba_id], (int) getpid(), populated_efi[hba_id]);
		return imsm_platform_test(hba_id, &populated_efi[hba_id], &imsm_efi[hba_id]);
	}
	/* OROM test is set, return that there is no EFI capabilities */
	if (check_env("IMSM_TEST_OROM"))
		return NULL;

	if (read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID)) {
		populated_efi[hba_id] = 0;
		return NULL;
	}

	populated_efi[hba_id] = 1;
	return &imsm_efi[hba_id];
}

/*
 * backward interface compatibility
 */
const struct imsm_orom *find_imsm_orom(void)
{
	return find_imsm_hba_orom(SYS_DEV_SATA);
}

const struct imsm_orom *find_imsm_capability(enum sys_dev_type hba_id)
{
	const struct imsm_orom *cap=NULL;

	if ((cap = find_imsm_efi(hba_id)) != NULL)
		return cap;
	if ((cap = find_imsm_hba_orom(hba_id)) != NULL)
		return cap;
	return NULL;
}

char *devt_to_devpath(dev_t dev)
{
	char device[46];

	sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
	return realpath(device, NULL);
}

char *diskfd_to_devpath(int fd)
{
	/* return the device path for a disk, return NULL on error or fd
	 * refers to a partition
	 */
	struct stat st;

	if (fstat(fd, &st) != 0)
		return NULL;
	if (!S_ISBLK(st.st_mode))
		return NULL;

	return devt_to_devpath(st.st_rdev);
}

int path_attached_to_hba(const char *disk_path, const char *hba_path)
{
	int rc;

	if (check_env("IMSM_TEST_AHCI_DEV") ||
	    check_env("IMSM_TEST_SCU_DEV")) {
		return 1;
	}

	if (!disk_path || !hba_path)
		return 0;
	dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
	if (strncmp(disk_path, hba_path, strlen(hba_path)) == 0)
		rc = 1;
	else
		rc = 0;

	return rc;
}

int devt_attached_to_hba(dev_t dev, const char *hba_path)
{
	char *disk_path = devt_to_devpath(dev);
	int rc = path_attached_to_hba(disk_path, hba_path);

	if (disk_path)
		free(disk_path);

	return rc;
}

int disk_attached_to_hba(int fd, const char *hba_path)
{
	char *disk_path = diskfd_to_devpath(fd);
	int rc = path_attached_to_hba(disk_path, hba_path);

	if (disk_path)
		free(disk_path);

	return rc;
}
Commit	Line	Data
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>
fc13853f LM	32
9c747fa0 LM	33	static int devpath_to_ll(const char dev_path, const char entry,
	34	unsigned long long *val);
	35
fc13853f	36	static __u16 devpath_to_vendor(const char *dev_path);
b390f610	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' */
5dbb8c8d	53	char path[292];
b390f610 DW	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;
a8e5382a	60	enum sys_dev_type type;
9c747fa0	61	unsigned long long dev_id;
a8e5382a LM	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;
b390f610 DW	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)) {
5a1920f2 AW	75	int n;
5a1920f2 AW	76
b390f610 DW	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);
5a1920f2	82	n = readlink(path, link, sizeof(link));
f21e18ca	83	if (n < 0 \|\| n >= (int)sizeof(link))
b390f610	84	continue;
5a1920f2	85	link[n] = '\0';
b390f610 DW	86	c = strrchr(link, '/');
	87	if (!c)
	88	continue;
	89	if (strncmp(bus, c+1, strlen(bus)) != 0)
	90	continue;
	91
a8e5382a LM	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
9c747fa0 LM	99	if (devpath_to_ll(path, "device", &dev_id) != 0)
	100	continue;
	101
b390f610 DW	102	/* start / add list entry */
b390f610 DW	103	if (!head) {
503975b9	104	head = xmalloc(sizeof(*head));
b390f610 DW	105	list = head;
b390f610 DW	106	} else {
503975b9	107	list->next = xmalloc(sizeof(*head));
b390f610 DW	108	list = list->next;
	109	}
	110
	111	if (!list) {
	112	free_sys_dev(&head);
	113	break;
	114	}
	115
9c747fa0	116	list->dev_id = (__u16) dev_id;
a8e5382a	117	list->type = type;
e3635eee	118	list->path = realpath(path, NULL);
b390f610	119	list->next = NULL;
a8e5382a LM	120	if ((list->pci_id = strrchr(list->path, '/')) != NULL)
a8e5382a LM	121	list->pci_id++;
b390f610	122	}
2a17c77b	123	closedir(driver_dir);
b390f610 DW	124	return head;
	125	}
	126
9c747fa0	127	static struct sys_dev *intel_devices=NULL;
9bc4ae77	128	static time_t valid_time = 0;
9c747fa0 LM	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
fc13853f	156	static __u16 devpath_to_vendor(const char *dev_path)
b390f610 DW	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
a8e5382a	180	struct sys_dev *find_intel_devices(void)
b390f610	181	{
a8e5382a LM	182	struct sys_dev ahci, isci;
a8e5382a LM	183
9bc4ae77 N	184	if (valid_time > time(0) - 10)
	185	return intel_devices;
	186
	187	if (intel_devices)
	188	free_sys_dev(&intel_devices);
	189
a8e5382a LM	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	}
9bc4ae77 N	201	intel_devices = ahci;
	202	valid_time = time(0);
	203	return intel_devices;
b390f610 DW	204	}
b390f610 DW	205
3c8bfb5d	206	/*
fc13853f	207	* PCI Expansion ROM Data Structure Format */
3c8bfb5d LM	208	struct pciExpDataStructFormat {
	209	__u8 ver[4];
	210	__u16 vendorID;
	211	__u16 deviceID;
	212	} __attribute__ ((packed));
	213
fc13853f LM	214	static struct imsm_orom imsm_orom[SYS_DEV_MAX];
	215	static int populated_orom[SYS_DEV_MAX];
	216
3c8bfb5d	217	static int scan(const void start, const void end, const void *data)
b390f610 DW	218	{
	219	int offset;
	220	const struct imsm_orom *imsm_mem;
fc13853f	221	int dev;
b390f610	222	int len = (end - start);
3c8bfb5d LM	223	struct pciExpDataStructFormat ptr= (struct pciExpDataStructFormat )data;
3c8bfb5d LM	224
9c747fa0 LM	225	if (data + 0x18 > end) {
	226	dprintf("cannot find pciExpDataStruct \n");
	227	return 0;
	228	}
	229
3c8bfb5d LM	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
9c747fa0 LM	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	}
fc13853f	240	else
3c8bfb5d	241	return 0;
b390f610 DW	242
	243	for (offset = 0; offset < len; offset += 4) {
	244	imsm_mem = start + offset;
96687b79	245	if ((memcmp(imsm_mem->signature, "$VER", 4) == 0)) {
fc13853f LM	246	imsm_orom[dev] = *imsm_mem;
	247	populated_orom[dev] = 1;
	248	return populated_orom[SYS_DEV_SATA] && populated_orom[SYS_DEV_SAS];
b390f610 DW	249	}
b390f610 DW	250	}
b390f610 DW	251	return 0;
	252	}
	253
fc13853f LM	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 \|
cceebc67	259	IMSM_OROM_RLC_RAID10 \| IMSM_OROM_RLC_RAID5;
fc13853f	260	imsm_orom->sss = IMSM_OROM_SSS_4kB \| IMSM_OROM_SSS_8kB \|
cceebc67 DW	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;
fc13853f LM	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;
cceebc67 DW	283	}
cceebc67 DW	284
fc13853f LM	285	return imsm_orom;
	286	}
	287
fc13853f LM	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",
5d500228	303	&imsm_orom[hba_id], (int) getpid(), populated_orom[hba_id]);
fc13853f LM	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
9bc4ae77	311	find_intel_devices();
9c747fa0 LM	312
9c747fa0 LM	313	if (intel_devices == NULL)
b390f610 DW	314	return NULL;
	315
	316	/* scan option-rom memory looking for an imsm signature */
969c2555 DW	317	if (check_env("IMSM_SAFE_OROM_SCAN"))
	318	align = 2048;
	319	else
	320	align = 512;
	321	if (probe_roms_init(align) != 0)
b390f610 DW	322	return NULL;
b390f610 DW	323	probe_roms();
9c747fa0	324	/* ignore return value - True is returned if both adapater roms are found */
fc13853f	325	scan_adapter_roms(scan);
b390f610 DW	326	probe_roms_exit();
b390f610 DW	327
fc13853f LM	328	if (populated_orom[hba_id])
	329	return &imsm_orom[hba_id];
	330	return NULL;
	331	}
	332
1a901471 LM	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) }})
fc13853f	342
5a6baf66 LM	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
aae4c111	354	int read_efi_variable(void buffer, ssize_t buf_size, char variable_name, struct efi_guid guid)
5a6baf66	355	{
5a6baf66 LM	356	char path[PATH_MAX];
5a6baf66 LM	357	char buf[GUID_STR_MAX];
aae4c111 HCP	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))
5d500228	378	\|\| (errno != 0 && var_data_len == 0))
aae4c111 HCP	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	}
5a6baf66	397
aae4c111 HCP	398	const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id)
aae4c111 HCP	399	{
5a6baf66 LM	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 */
aae4c111	419	if (check_env("IMSM_TEST_OROM"))
5a6baf66	420	return NULL;
5a6baf66	421
aae4c111	422	if (read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID)) {
5a6baf66 LM	423	populated_efi[hba_id] = 0;
	424	return NULL;
	425	}
aae4c111	426
5a6baf66 LM	427	populated_efi[hba_id] = 1;
	428	return &imsm_efi[hba_id];
	429	}
	430
fc13853f LM	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
5a6baf66 LM	443	if ((cap = find_imsm_efi(hba_id)) != NULL)
5a6baf66 LM	444	return cap;
fc13853f LM	445	if ((cap = find_imsm_hba_orom(hba_id)) != NULL)
fc13853f LM	446	return cap;
b390f610 DW	447	return NULL;
b390f610 DW	448	}
25921536 DW	449
	450	char *devt_to_devpath(dev_t dev)
	451	{
37f0e1e0	452	char device[46];
25921536 DW	453
25921536 DW	454	sprintf(device, "/sys/dev/block/%d:%d/device", major(dev), minor(dev));
e3635eee	455	return realpath(device, NULL);
25921536 DW	456	}
25921536 DW	457
a8e5382a	458	char *diskfd_to_devpath(int fd)
25921536 DW	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
fc13853f LM	477	if (check_env("IMSM_TEST_AHCI_DEV") \|\|
	478	check_env("IMSM_TEST_SCU_DEV")) {
	479	return 1;
	480	}
	481
25921536 DW	482	if (!disk_path \|\| !hba_path)
25921536 DW	483	return 0;
a8e5382a	484	dprintf("hba: %s - disk: %s\n", hba_path, disk_path);
25921536 DW	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	}