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/*
* osd_protocol.h - OSD T10 standard C definitions.
*
* Copyright (C) 2008 Panasas Inc. All rights reserved.
*
* Authors:
* Boaz Harrosh <bharrosh@panasas.com>
* Benny Halevy <bhalevy@panasas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
*
* This file contains types and constants that are defined by the protocol
* Note: All names and symbols are taken from the OSD standard's text.
*/
#ifndef __OSD_PROTOCOL_H__
#define __OSD_PROTOCOL_H__
#include <linux/types.h>
#include <asm/unaligned.h>
#include <scsi/scsi.h>
enum {
OSDv1_ADDITIONAL_CDB_LENGTH = 192,
OSDv1_TOTAL_CDB_LEN = OSDv1_ADDITIONAL_CDB_LENGTH + 8,
OSDv1_CAP_LEN = 80,
/* Latest supported version */
OSDv2_ADDITIONAL_CDB_LENGTH = 228,
OSD_ADDITIONAL_CDB_LENGTH =
OSDv2_ADDITIONAL_CDB_LENGTH,
OSD_TOTAL_CDB_LEN = OSD_ADDITIONAL_CDB_LENGTH + 8,
OSD_CAP_LEN = 104,
OSD_SYSTEMID_LEN = 20,
OSDv1_CRYPTO_KEYID_SIZE = 20,
OSDv2_CRYPTO_KEYID_SIZE = 32,
OSD_CRYPTO_KEYID_SIZE = OSDv2_CRYPTO_KEYID_SIZE,
OSD_CRYPTO_SEED_SIZE = 4,
OSD_CRYPTO_NONCE_SIZE = 12,
OSD_MAX_SENSE_LEN = 252, /* from SPC-3 */
OSD_PARTITION_FIRST_ID = 0x10000,
OSD_OBJECT_FIRST_ID = 0x10000,
};
/* (osd-r10 5.2.4)
* osd2r03: 5.2.3 Caching control bits
*/
enum osd_options_byte {
OSD_CDB_FUA = 0x08, /* Force Unit Access */
OSD_CDB_DPO = 0x10, /* Disable Page Out */
};
/*
* osd2r03: 5.2.5 Isolation.
* First 3 bits, V2-only.
* Also for attr 110h "default isolation method" at Root Information page
*/
enum osd_options_byte_isolation {
OSD_ISOLATION_DEFAULT = 0,
OSD_ISOLATION_NONE = 1,
OSD_ISOLATION_STRICT = 2,
OSD_ISOLATION_RANGE = 4,
OSD_ISOLATION_FUNCTIONAL = 5,
OSD_ISOLATION_VENDOR = 7,
};
/* (osd-r10: 6.7)
* osd2r03: 6.8 FLUSH, FLUSH COLLECTION, FLUSH OSD, FLUSH PARTITION
*/
enum osd_options_flush_scope_values {
OSD_CDB_FLUSH_ALL = 0,
OSD_CDB_FLUSH_ATTR_ONLY = 1,
OSD_CDB_FLUSH_ALL_RECURSIVE = 2,
/* V2-only */
OSD_CDB_FLUSH_ALL_RANGE = 2,
};
/* osd2r03: 5.2.10 Timestamps control */
enum {
OSD_CDB_NORMAL_TIMESTAMPS = 0,
OSD_CDB_BYPASS_TIMESTAMPS = 0x7f,
};
/* (osd-r10: 5.2.2.1)
* osd2r03: 5.2.4.1 Get and set attributes CDB format selection
* 2 bits at second nibble of command_specific_options byte
*/
enum osd_attributes_mode {
/* V2-only */
OSD_CDB_SET_ONE_ATTR = 0x10,
OSD_CDB_GET_ATTR_PAGE_SET_ONE = 0x20,
OSD_CDB_GET_SET_ATTR_LISTS = 0x30,
OSD_CDB_GET_SET_ATTR_MASK = 0x30,
};
/* (osd-r10: 4.12.5)
* osd2r03: 4.14.5 Data-In and Data-Out buffer offsets
* byte offset = mantissa * (2^(exponent+8))
* struct {
* unsigned mantissa: 28;
* int exponent: 04;
* }
*/
typedef __be32 __bitwise osd_cdb_offset;
enum {
OSD_OFFSET_UNUSED = 0xFFFFFFFF,
OSD_OFFSET_MAX_BITS = 28,
OSDv1_OFFSET_MIN_SHIFT = 8,
OSD_OFFSET_MIN_SHIFT = 3,
OSD_OFFSET_MAX_SHIFT = 16,
};
/* Return the smallest allowed encoded offset that contains @offset.
*
* The actual encoded offset returned is @offset + *padding.
* (up to max_shift, non-inclusive)
*/
osd_cdb_offset __osd_encode_offset(u64 offset, unsigned *padding,
int min_shift, int max_shift);
/* Minimum alignment is 256 bytes
* Note: Seems from std v1 that exponent can be from 0+8 to 0xE+8 (inclusive)
* which is 8 to 23 but IBM code restricts it to 16, so be it.
*/
static inline osd_cdb_offset osd_encode_offset_v1(u64 offset, unsigned *padding)
{
return __osd_encode_offset(offset, padding,
OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
}
/* Minimum 8 bytes alignment
* Same as v1 but since exponent can be signed than a less than
* 256 alignment can be reached with small offsets (<2GB)
*/
static inline osd_cdb_offset osd_encode_offset_v2(u64 offset, unsigned *padding)
{
return __osd_encode_offset(offset, padding,
OSD_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);
}
/* osd2r03: 5.2.1 Overview */
struct osd_cdb_head {
struct scsi_varlen_cdb_hdr varlen_cdb;
/*10*/ u8 options;
u8 command_specific_options;
u8 timestamp_control;
/*13*/ u8 reserved1[3];
/*16*/ __be64 partition;
/*24*/ __be64 object;
/*32*/ union { /* V1 vs V2 alignment differences */
struct __osdv1_cdb_addr_len {
/*32*/ __be32 list_identifier;/* Rarely used */
/*36*/ __be64 length;
/*44*/ __be64 start_address;
} __packed v1;
struct __osdv2_cdb_addr_len {
/* called allocation_length in some commands */
/*32*/ __be64 length;
/*40*/ __be64 start_address;
union {
/*48*/ __be32 list_identifier;/* Rarely used */
/* OSD2r05 5.2.5 CDB continuation length */
/*48*/ __be32 cdb_continuation_length;
};
} __packed v2;
};
/*52*/ union { /* selected attributes mode Page/List/Single */
struct osd_attributes_page_mode {
/*52*/ __be32 get_attr_page;
/*56*/ __be32 get_attr_alloc_length;
/*60*/ osd_cdb_offset get_attr_offset;
/*64*/ __be32 set_attr_page;
/*68*/ __be32 set_attr_id;
/*72*/ __be32 set_attr_length;
/*76*/ osd_cdb_offset set_attr_offset;
/*80*/ } __packed attrs_page;
struct osd_attributes_list_mode {
/*52*/ __be32 get_attr_desc_bytes;
/*56*/ osd_cdb_offset get_attr_desc_offset;
/*60*/ __be32 get_attr_alloc_length;
/*64*/ osd_cdb_offset get_attr_offset;
/*68*/ __be32 set_attr_bytes;
/*72*/ osd_cdb_offset set_attr_offset;
__be32 not_used;
/*80*/ } __packed attrs_list;
/* osd2r03:5.2.4.2 Set one attribute value using CDB fields */
struct osd_attributes_cdb_mode {
/*52*/ __be32 set_attr_page;
/*56*/ __be32 set_attr_id;
/*60*/ __be16 set_attr_len;
/*62*/ u8 set_attr_val[18];
/*80*/ } __packed attrs_cdb;
/*52*/ u8 get_set_attributes_parameters[28];
};
} __packed;
/*80*/
/*160 v1*/
struct osdv1_security_parameters {
/*160*/u8 integrity_check_value[OSDv1_CRYPTO_KEYID_SIZE];
/*180*/u8 request_nonce[OSD_CRYPTO_NONCE_SIZE];
/*192*/osd_cdb_offset data_in_integrity_check_offset;
/*196*/osd_cdb_offset data_out_integrity_check_offset;
} __packed;
/*200 v1*/
/*184 v2*/
struct osdv2_security_parameters {
/*184*/u8 integrity_check_value[OSDv2_CRYPTO_KEYID_SIZE];
/*216*/u8 request_nonce[OSD_CRYPTO_NONCE_SIZE];
/*228*/osd_cdb_offset data_in_integrity_check_offset;
/*232*/osd_cdb_offset data_out_integrity_check_offset;
} __packed;
/*236 v2*/
struct osd_security_parameters {
union {
struct osdv1_security_parameters v1;
struct osdv2_security_parameters v2;
};
};
struct osdv1_cdb {
struct osd_cdb_head h;
u8 caps[OSDv1_CAP_LEN];
struct osdv1_security_parameters sec_params;
} __packed;
struct osdv2_cdb {
struct osd_cdb_head h;
u8 caps[OSD_CAP_LEN];
struct osdv2_security_parameters sec_params;
} __packed;
struct osd_cdb {
union {
struct osdv1_cdb v1;
struct osdv2_cdb v2;
u8 buff[OSD_TOTAL_CDB_LEN];
};
} __packed;
static inline struct osd_cdb_head *osd_cdb_head(struct osd_cdb *ocdb)
{
return (struct osd_cdb_head *)ocdb->buff;
}
/* define both version actions
* Ex name = FORMAT_OSD we have OSD_ACT_FORMAT_OSD && OSDv1_ACT_FORMAT_OSD
*/
#define OSD_ACT___(Name, Num) \
OSD_ACT_##Name = __constant_cpu_to_be16(0x8880 + Num), \
OSDv1_ACT_##Name = __constant_cpu_to_be16(0x8800 + Num),
/* V2 only actions */
#define OSD_ACT_V2(Name, Num) \
OSD_ACT_##Name = __constant_cpu_to_be16(0x8880 + Num),
#define OSD_ACT_V1_V2(Name, Num1, Num2) \
OSD_ACT_##Name = __constant_cpu_to_be16(Num2), \
OSDv1_ACT_##Name = __constant_cpu_to_be16(Num1),
enum osd_service_actions {
OSD_ACT_V2(OBJECT_STRUCTURE_CHECK, 0x00)
OSD_ACT___(FORMAT_OSD, 0x01)
OSD_ACT___(CREATE, 0x02)
OSD_ACT___(LIST, 0x03)
OSD_ACT_V2(PUNCH, 0x04)
OSD_ACT___(READ, 0x05)
OSD_ACT___(WRITE, 0x06)
OSD_ACT___(APPEND, 0x07)
OSD_ACT___(FLUSH, 0x08)
OSD_ACT_V2(CLEAR, 0x09)
OSD_ACT___(REMOVE, 0x0A)
OSD_ACT___(CREATE_PARTITION, 0x0B)
OSD_ACT___(REMOVE_PARTITION, 0x0C)
OSD_ACT___(GET_ATTRIBUTES, 0x0E)
OSD_ACT___(SET_ATTRIBUTES, 0x0F)
OSD_ACT___(CREATE_AND_WRITE, 0x12)
OSD_ACT___(CREATE_COLLECTION,
|