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/*
* 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 <asm/types.h>
#include <strings.h>
/* The IMSM OROM Version Table definition */
struct imsm_orom {
__u8 signature[4];
__u8 table_ver_major; /* Currently 2 (can change with future revs) */
__u8 table_ver_minor; /* Currently 2 (can change with future revs) */
__u16 major_ver; /* Example: 8 as in 8.6.0.1020 */
__u16 minor_ver; /* Example: 6 as in 8.6.0.1020 */
__u16 hotfix_ver; /* Example: 0 as in 8.6.0.1020 */
__u16 build; /* Example: 1020 as in 8.6.0.1020 */
__u8 len; /* number of bytes in this entire table */
__u8 checksum; /* checksum of all the bytes in this table */
__u16 rlc; /* RAID Level Capability */
/* we assume the cpu is x86 as the orom should not be found
* anywhere else
*/
#define IMSM_OROM_RLC_RAID0 (1 << 0)
#define IMSM_OROM_RLC_RAID1 (1 << 1)
#define IMSM_OROM_RLC_RAID10 (1 << 2)
#define IMSM_OROM_RLC_RAID1E (1 << 3)
#define IMSM_OROM_RLC_RAID5 (1 << 4)
#define IMSM_OROM_RLC_RAID_CNG (1 << 5)
__u16 sss; /* Strip Size Supported */
#define IMSM_OROM_SSS_2kB (1 << 0)
#define IMSM_OROM_SSS_4kB (1 << 1)
#define IMSM_OROM_SSS_8kB (1 << 2)
#define IMSM_OROM_SSS_16kB (1 << 3)
#define IMSM_OROM_SSS_32kB (1 << 4)
#define IMSM_OROM_SSS_64kB (1 << 5)
#define IMSM_OROM_SSS_128kB (1 << 6)
#define IMSM_OROM_SSS_256kB (1 << 7)
#define IMSM_OROM_SSS_512kB (1 << 8)
#define IMSM_OROM_SSS_1MB (1 << 9)
#define IMSM_OROM_SSS_2MB (1 << 10)
#define IMSM_OROM_SSS_4MB (1 << 11)
#define IMSM_OROM_SSS_8MB (1 << 12)
#define IMSM_OROM_SSS_16MB (1 << 13)
#define IMSM_OROM_SSS_32MB (1 << 14)
#define IMSM_OROM_SSS_64MB (1 << 15)
__u16 dpa; /* Disks Per Array supported */
__u16 tds; /* Total Disks Supported */
__u8 vpa; /* # Volumes Per Array supported */
__u8 vphba; /* # Volumes Per Host Bus Adapter supported */
/* Attributes supported. This should map to the
* attributes in the MPB. Also, lower 16 bits
* should match/duplicate RLC bits above.
*/
__u32 attr;
#define IMSM_OROM_ATTR_RAID0 IMSM_OROM_RLC_RAID0
#define IMSM_OROM_ATTR_RAID1 IMSM_OROM_RLC_RAID1
#define IMSM_OROM_ATTR_RAID10 IMSM_OROM_RLC_RAID10
#define IMSM_OROM_ATTR_RAID1E IMSM_OROM_RLC_RAID1E
#define IMSM_OROM_ATTR_RAID5 IMSM_OROM_RLC_RAID5
#define IMSM_OROM_ATTR_RAID_CNG IMSM_OROM_RLC_RAID_CNG
#define IMSM_OROM_ATTR_2TB (1 << 29)
#define IMSM_OROM_ATTR_PM (1 << 30)
#define IMSM_OROM_ATTR_ChecksumVerify (1 << 31)
__u32 reserved1;
__u32 reserved2;
} __attribute__((packed));
static inline int imsm_orom_has_raid0(const struct imsm_orom *orom)
{
return !!(orom->rlc & IMSM_OROM_RLC_RAID0);
}
static inline int imsm_orom_has_raid1(const struct imsm_orom *orom)
{
return !!(orom->rlc & IMSM_OROM_RLC_RAID1);
}
static inline int imsm_orom_has_raid1e(const struct imsm_orom *orom)
{
return !!(orom->rlc & IMSM_OROM_RLC_RAID1E);
}
static inline int imsm_orom_has_raid10(const struct imsm_orom *orom)
{
return !!(orom->rlc & IMSM_OROM_RLC_RAID10);
}
static inline int imsm_orom_has_raid5(const struct imsm_orom *orom)
{
return !!(orom->rlc & IMSM_OROM_RLC_RAID5);
}
/**
* imsm_orom_has_chunk - check if the orom supports the given chunk size
* @orom: orom pointer from find_imsm_orom
* @chunk: chunk size in kibibytes
*/
static inline int imsm_orom_has_chunk(const struct imsm_orom *orom, int chunk)
{
int fs = ffs(chunk);
if (!fs)
return 0;
fs--; /* bit num to bit index */
return !!(orom->sss & (1 << (fs - 1)));
}
/**
* fls - find last (most-significant) bit set
* @x: the word to search
* The funciton is borrowed from Linux kernel code
* include/asm-generic/bitops/fls.h
*/
static inline int fls(int x)
{
int r = 32;
if (!x)
return 0;
if (!(x & 0xffff0000u)) {
x <<= 16;
r -= 16;
}
if (!(x & 0xff000000u)) {
x <<= 8;
r -= 8;
}
if (!(x & 0xf0000000u)) {
x <<= 4;
r -= 4;
}
if (!(x & 0xc0000000u)) {
x <<= 2;
r -= 2;
}
if (!(x & 0x80000000u)) {
x <<= 1;
r -= 1;
}
return r;
}
/**
* imsm_orom_default_chunk - return the largest chunk size supported via orom
* @orom: orom pointer from find_imsm_orom
*/
static inline int imsm_orom_default_chunk(const struct imsm_orom *orom)
{
int fs = fls(orom->sss);
if (!fs)
return 0;
return min(512, (1 << fs));
}
struct sys_dev {
char *path;
struct sys_dev *next;
};
struct sys_dev *find_driver_devices(const char *bus, const char *driver);
__u16 devpath_to_vendor(const char *dev_path);
void free_sys_dev(struct sys_dev **list);
const struct imsm_orom *find_imsm_orom(void);
int disk_attached_to_hba(int fd, const char *hba_path);
char *devt_to_devpath(dev_t dev);
int path_attached_to_hba(const char *disk_path, const char *hba_path);
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